What does the water pump impeller do?

In a water pump, the impeller is the part that distributes coolant throughout the cooling system of the vehicle. And it must be properly designed to provide the correct system pressure for all driving conditions.

The rotating vanes on this small, round disc assist in moving the coolant through the cooling circuit and thus cool the vehicle’s engine. When this component fails, the coolant supply is cut off, causing the engine to overheat. As you know, the health and efficiency of your vehicle’s engine requires an optimal temperature. Without it, it could cause serious and irreparable damage.

The impeller is made up of several curved blades. The coolant flows through the turbine along its axis and escapes between the fins along the circumference.

Keep reading: Types of automotive water pumps

Water pump impellers: Types

All water pumps are not the same. Some are made with plastic impellers while others have metal.

The impellers manufactured in DOLZ are made from injected plastic, cast iron or aluminum passivated, depending on the original OEM design. Besides, factors such as diameter, number and height of the fins, and other specifications determine the type of impeller.

So, let’s get to know which are the two main types of water pump impellers:

1. Open turbine

An open impeller has blades that are open on both sides and also lacks a protective cover. It is a type of turbine that, as a general rule, is found in smaller water pumps and that also are not subject to much stress. Although there is also the possibility of finding them in larger water pumps.

2. Closed turbine

On the other hand, the closed impeller is completely covered at the front of the part and offers maximum resistance. They are generally the most popular type of turbine for large pumps that move coolant, although smaller water pumps can also be found. Thus, thanks to its design, axial thrust is reduced, which can increase the useful life of the bearing.

How to know if a water pump impeller is malfunctioning?

Though impeller failure is not common, it can happen when the impeller blades slip when the engine is started. Impeller corrosion can also occur from unsuitable or deteriorated coolant. So, when you have a bad impeller, you can have a lot of troubles.

If your impeller fails, the pump will be unable to provide coolant to the engine, causing it to overheat. You may be able to avoid serious difficulties if you notice that your water pump is failing early on. However, if you overlook a bad impeller in time, the consequences might be disastrous for your engine.

There are five symptoms that your cooling system needs attention:

• Pump leakage

• Slow re-priming

• Unusual noises or vibrations

• Overheating

• Reduced pump flow

Article of interest: Failing car water pump: Signs

It’s also possible for the impeller to become loose on the shaft, so although the impeller looks well, it doesn’t pump anything!

Dolz TIP: You will pay the price later if you keep your water pump impeller going with patchwork repairs and makeshift remedies, and you have to pay it later. While you may be under pressure to keep production going, these temporary repairs will not prevent the pump from failing.

Think of it like insurance and protecting your investment. For that, DOLZ recommends replace the water pumps and prevent future problems for your vehicle.

If you need further information or have any technical question with the water pump impeller, please contact us and our team will help you.

Fresh Stock! September’s New-to-Range: DOLZ New-to-Range September 25

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In today’s article we talk about the top 5 mistakes in the installation of a water pump and how to effectively install this key element of the cooling system.

Keep learning: Understanding the water pump drive: Exploring its location and operation

Installing a water pump: Mistakes

1. Cooling System Preparation

One of the main and often overlooked problems is in the preparation of the system through which the water pump will circulate the coolant.

Before installing a water pump it will be especially important to flush, drain and refill the cooling system with the OE (original equipment) specified coolant mix. On the contrary, the correct operation of the new water pump would be jeopardized.

Dolz Tip: When preparing the cooling system, if you notice that the old coolant is very dirty, it is advisable to check the thermostat and replace it if necessary. If you’re unsure how to check thermostat car, ensure you follow proper steps, including inspecting the thermostat for signs of malfunction and verifying coolant flow behavior.

2. Improper mix of coolant and water

Another common error is found in contamination caused by the incorrect mix of coolant and water or its improper use. Contaminated or improperly mixed coolant can cause corrosion problems, the dreaded cavitation, and cause leaks between the two contact faces of the water pump’s dynamic seal.

When choosing the right coolant, it is essential to check the expiration date and follow the vehicle manufacturer’s recommendations, as each individual engine is made from different materials and has specific needs.

3. Incorrect use of sealing paste

The use of sealing paste in the water pump is only necessary in those that are supplied without a gasket. Otherwise, if we add sealant when it is not needed, we will cause any particle of sealing paste that circulates through the cooling circuit coming from the pump gasket, which may affect the functionality of the dynamic seal, preventing the correct sealing function and causing a failure premature of it.

Incorrect use of sealing paste will directly affect the life expectancy of the water pump. Therefore, unless specified or referenced without a gasket, avoid the use of sealants.

4. Water pump dry rotation

Another mistake to avoid during installation is dry rotation of the water pump.

When refilling the cooling circuit after replacing the water pump, many manufacturers recommend that the pump be turned by hand until it is full. This fine-tuning of the pump can reduce the possibility of loss of the “mechanical” seal since the coolant liquid reaches the component of the mechanical seal creating a film that will prevent its spillage.

Otherwise, if the pump runs dry, it will cause damage to the seal, which may lead to premature leaks or squeaking noise in the water pump.

5. Water pump and timing belt

One of the most common mistakes is to overlook the distribution when we are doing the installation of the new water pump. The water pump is driven by the belt transmission system, which means that combining the replacement of both systems improves the quality and the safety of the process, which is why it is a highly recommended practice.

Previously the replacement of these two components was carried out separately, but nowadays it is more and more common to carry out this operation at the same time. This allows better vehicle performance and longer average lifespan of the water pump.

If the timing belt and other related items are installed incorrectly, this will directly affect the performance of the water pump.

Relating Content: Discovering the main water pump components

Discover Dolz’s water pump range

We manufacture more than 5.5 million units per year over a range which comprises:

• Water pumps for passenger cars
• Water pumps for industrial vehicles
• Auxiliary electric water pumps
• Variable water pumps
• Electric water pumps

All our range has the ISO 9001:2015 certification, which means quality 100% tested. A process as simple as it is fundamental and for which, among many other factors, DOLZ water pumps are the pumps with the highest quality on the market.

Main characteristics of the range

• The DOLZ range is made of 1300 references, among which 990 for cars applications & 18% only for Asian applications,
• 95% coverage of the European car parc.
• 95% of the DOLZ range includes a Silicon Carbide Dynamic Seal, that guarantees optimum tightness and durability of the water pump,
• Water pumps designed according to OE specifications,
• Automatized manufacturing process that guarantees an excellent quality.

All of them have 100% cast aluminum material, resistant to wear and OE equivalent, always following the highest standards.

At DOLZ, we have been an expert manufacturer of water pumps since 1934. If you would like to find out more about our range of water pumps and other Dolz product lines, contact us!

La entrada Top 5 mistakes to avoid when installing the water pump se publicó primero en Industrias Dolz.

Heavy vehicles such as trucks or industrial vehicles involve large engines and therefore generate a large amount of heat. That is why the cooling system is considered a key element for good engine performance. Overheating can increase the risk of engine damage, so it is essential to ensure that the engine does not experience additional stress due to extremely high temperatures.

Keep reading to learn more about electromagnetic truck water pumps, their variable operation and how they differ from traditional mechanical water pumps.

What is an electromagnetic water pump?

There are different ways to regulate the coolant, some of them are carried out by an electro hydraulic actuator, or a belt drive, also by electrical activation on the water pump back housing (thermostat) or also by an electromagnetic coupling.

In relation to the last one mentioned, the use of this electromagnetic technology has spread to form part of systems such as vehicle air conditioning or engine cooling system, meeting the growing demands for efficiency and flexibility in engine performance.

A key component of any water pump is the impeller, responsible for moving the coolant through the system. But what is impeller in pump technology? The impeller is a rotating component with vanes or blades designed to increase fluid pressure and flow. In an electromagnetic water pump, the impeller’s operation is optimized by the electromagnetic clutch, adjusting the coolant flow based on engine demand.

The main difference between a mechanical water pump and one that has the EM (electromagnetic) clutch is that this electromagnetic clutch system can automatically adjust output flow of the water pump more meets the demand of motor. On the other hand, the traditional water pump will circulate the coolant in a fixed and constant way because its speed is directly connected to the speed of the engine.

How does the electromagnetic clutch work? 

In an electromagnetic clutch, the pulley (rotor) is independent of impeller. The connection between both elements is achieved by pressing two friction elements using an electromagnet.

When this electromagnet is activated, the clutch engages, and both the rotor and the impeller rotate together. Without current, a spring separates the friction elements leaving the rotor free of the system. Clutch system control is performed by the engine control unit (ECU) using thermal sensors located on the engine.

To guarantee a minimum flow of the pump when the electromagnetic clutch is deactivated, a second magnetic clutch is fixed to the rotor. This second clutch does not guarantee joint rotation between both components, but it guarantees a 50% and 60% of the flow between them when there is a friction coupling.

In most situations, this flow is enough to keep the engine properly cooled and to have this type of clutch, which has no friction or contact between the rotor and the impeller, significantly reducing power consumption and besides fuel consumption. Only in some situations as per example high outside temperatures, a 100% flow is necessary and, in those cases, the electromagnet will activate to generate a total coupling by friction.

For all the above considerations, its main advantages are:

1. 1. Reduces fuel consumption.
   2. Provides greater flexibility thermal management.
   3. Reduces system inertia and increases tolerance to changes in revolutions.

• Guarantees minimum flow for normal circuit operation if an electrical system failure occurs.

*V501 Dolz electromagnetic water pump for truck

Related content: Truck water pump: How to select the correct one?

Main components of the EM clutch

• The rotor, the pulley, the element that is in contact with the belt fixed to the water pump.
• The static friction ring, attached to the rotor, and the spring-loaded secondary friction ring, engaged to the impeller through the inner shaft.
• The electromagnet, attached to the water pump, which acts on the spring-loaded friction ring and engages it on the static ring. And then, there is a secondary magnetic clutch magnets.
• The secondary clutch armature ring, over the magnets.
• Heat dissipation system

Dolz Electromagnetic Water Pump

Industrias Dolz has been manufacturing and distributing high-quality water pumps for passenger cars, commercial & industrial vehicles since 1934.

Among the strengths of Dolz water pumps are:

• Full in-house production …All in Dolz
• Self-lubricating silicon carbide (SiC) seals, with HNBR rubbers and synthetic graphite contact rings to increase durability and guarantee performance.
• OE equivalent.
• ISO 9001:2015 Quality Management System
• All water pumps are supplied with the necessary fittings/gaskets.

Dolz has a manufacturing plant built on an aera of 25,000 square meters focused on innovation and market demands, automation and robotization in production processes and logistics efficiency. It manufactures more than 100,000 automotive water pumps per week and has a permanent stock of more than half a million water pumps.

Keep reading: …All in Dolz. In-house production end to end.

Contact to discover more about our full range of electromagnetic water pumps and other Dolz product lines. 

La entrada Electromagnetic water pumps for truck se publicó primero en Industrias Dolz.

Main uses and functions of secondary water pumps in vehicles

Secondary water pumps, also known as auxiliary pumps, are the star component in upsetting any vehicle’s cooling system. Even though not all vehicles have one (yet), these pumps are growingly popular as engines become more efficient and generate less excess heat. 

This type of pump is not connected to the main engine cooling system, so it is not running all the time. Instead, it provides supplementary coolant that circulates through a bypass hose to the heater core when needed. Additionally, it guarantees the cooling of the electric motor, and the inverter that electric and hybrid vehicles have.

Secondary water pumps keep the coolant flowing even when the engine is not running, ensuring there is always enough volume of coolant to keep the heater core warm. This enables vehicle engineers to use larger heater cores, allowing for the following features:

Improve driver comfort

Some types of engines, such as diesel-power ones, do not generate great amounts of heat when running or idling. This means that in lower engine speeds, the coolant in the heater core might lose its heat before being passed through the outlet. Adding a secondary coolant pump secures optimum heating even at low speeds.

This is important for passenger comfort, since it allows for sufficient heating even when passengers are driving in traffic or at low RPM. Moreover, an auxiliary water pump can also keep the cabin heated for short periods of time, even after the driver has turned off the ignition.

Maintain battery temperature

Thermal management poses a singular challenge in fully or partially battery-powered vehicles. Modern vehicles with hybrid drive and stop/start systems use batteries that must be kept at a certain operating temperature of engine to remain efficient in the long term. This is where auxiliary pumps come into play, for example to cool down the turbocharge.

The intelligent thermal management in these vehicles relies on several auxiliary pumps, which are turned on by the ECU when needed for a more targeted cooling. These pumps are individually adjustable; each of them is responsible for cooling a different area and can fail or be replaced without affecting the others.

Related content: When and how to install an auxiliary electric water pump

Signs and causes of failure in the secondary water pump

The main reasons why a secondary water pump fails are:

1. Fluctuating heating performance
2. Buzzing sound under the dashboard
3. Age and wear
4. Overheating
5. Low or bad coolant
6. Defective pump or improper installation

Keep reading to know more in depth about them:

1. Fluctuating heating performance

If the secondary water pump in a vehicle is inoperative, it will most probably lead to reduced or fluctuating heater performance at low speeds and at idle. This might also affect window fog, resulting in the defrost mode not working.

2. Buzzing sound under the dashboard

If there is an electrical problem with the secondary coolant pump, the pump might run faster than it should or continue to run after the engine is turned off. This will occasionally result in a high-pitched buzzing sound.

The sound indicates an electrical short in the wiring that powers the engine auxiliary water pump and is a key indicator of a need for replacement.

3. Age and wear

Like all moving and rotating components, brushes wear and windings short. The most common cause of water pump failure is simply from age and wear of its electric motor. Over time, most parts in a car or truck, auxiliary pumps included, start to break down due to constant wear and tear. 

4. Overheating

Overheating issues might affect any water pump’s lifespan. Too much heat in the engine can cause problems with the coolant system. Overheating can hasten the auxiliary water pump’s failure because increased cooling system pressures can force coolant past the shaft seals.

5. Low or bad coolant

Low coolant can cause a pump to fail. If too little coolant is circulating through the circuit, the blower fan will pull enough heat out of the coolant and cause the heater core to get cold. Furthermore, if the fluid in the cooling system is not properly maintained or if it is mixed with improper fluids such as water, corrosion will occur, reducing pump efficiency.

6. Defective pump or improper installation

A defective or improperly installed auxiliary pump will, at some early point, start showing the malfunctioning symptoms outlined in the previous section. Investing in a quality and compatible brand, as well as paying attention to all individual specifications of assembly will ensure the correct functioning of the vehicle’s cooling system.

You may like: Peculiarities of an auxiliary water pump

Guaranteed auxiliary water pumps with a trusted supplier

Industrias Dolz, with almost 90 years of history, is a leader in the manufacture of water pumps. From mechanical and electrical water pumps to variable and auxiliary water pumps.

Currently our range of auxiliary electric water pumps offers more than 70 references, all of them now available, which allows us to cover most of the current fleet of vehicles, fully covering the needs and demands of our customers and allows us to continue expanding our range of products.

This year we launched 28 new references of our auxiliary electric water pumps.

The new secondary water pump references cover the demands of more than 850 vehicle models from brands such as Mercedes-Benz, Audi, BMW, Ford, Porsche, Jaguar, or Opel.

If you want to know more about them, check this post!

And if you are looking for top-tier auxiliary electric water pumps, contact us and we will provide you with the information and support you need.

…yes we have!

La entrada Common causes and symptoms of secondary water pump failure se publicó primero en Industrias Dolz.

Where a car’s engine is housed, there are several systems in charge of making it work as it should. Among them, the cooling system where the engine water pump is a key component, helps to lower the excessive temperature of the engine dissipating excess heat.

Find out everything you need to know about the water pump, what role it plays in your engine, and how to choose the correct water pump to ensure efficient driving.

What does the engine water pump do?

Simply put, an engine water pump is at the heart of an engine’s cooling system (without it, the system would not be able to fulfill its purpose). Thanks to the water pump, which operates together with the thermostat and the radiator, it is ensured that the engine block maintains the correct temperature, preventing overheating and optimally completing combustion.

As we’ve seen, the job of the engine water pump is to circulate coolant that absorbs heat, the full circuit being receiving coolant from the radiator and sending it through hoses to the engine. Once it reaches it, the coolant liquid absorbs heat and goes back to the radiator, where it’s cooled so that the cycle can start again. All this allows the combustion engine to reach its intended service temperature as soon as possible and maintain optimal conditions in different load situations.

Thus, the water pump is essential for the proper functioning and durability of the cooling system and the overall operation of the engine. It’s important to ensure that this system has the best possible quality and therefore contributes to good thermal management of the engine.

Basic parts of an engine water pump

A water pump consists of several key components, each playing a crucial role in ensuring the efficient circulation of coolant throughout the engine. Below are the basic parts of water pump and their function:

• Impeller: It is a rotor that increases the pressure and flow of liquid inside a water pump. The impeller is the heart of a water pump, and without it, the entire system can fail. There are different impeller types, each designed for specific applications to optimize efficiency and durability.
• Housing: responsible for protecting the water pump from external damage, as well as preventing the coolant from leaking out of the circuit and damaging the engine. They can be made from aluminum, cast iron or steel.
• Spindle bearing: it represents the mechanical support enabling the shaft to move continuously and steadily. It receives the turning force from the pulley and transfers it to the next component in line, which is the impeller. 
• Hub or Pulley: it acts as the power source for the impeller, thus generating the rotation forces needed to the engine water pump to function.
• Seal: it’s in charge of preventing leakages and avoiding bearings from being contaminated. It plays an important role in keeping the water pump intact.

Related content: Discover the main parts of a car engine (and its functions)

The relationship between the water pump and the engine

The purpose of the water pump is to counteract the increased heat produced by the engine. It would not be possible to dissipate the excess heat generated by combustion or to cool it faster and more efficiently without a water pump in the cooling circuit.

All in all, the performance of the different parts of the engine and the water pump is intrinsically connected: the power consumption of the water pump thereby increases in line with the engine speed. In fact, if your water pump stops working, your engine could fail.

Understanding the engine cooling system 

A typical engine cooling system comprises the following components: 

• Radiator, which acts as a sort of heat exchanger through the use of many fine tubes in charge of receiving and cooling the liquid sent from the engine. Radiators pass excess heat into an airstream, effectively cooling the liquid that is then returned to flow back into the channels. 
• Water pump in charge of circulating coolant. As we’ve seen, it’s driven by pulley and belts from engine crankshafts. It will send coolant down through the radiator, assisting in the circulation of the coolant.
• Thermostat, in charge of adjusting the level of coolant that will later circulate into radiator.
• Fans, driven by belts, it is responsible for pulling out air through the radiator.
• Hoses, where the coolant circulates.
• Coolant, the liquid in charge of absorbing heat from the engine and circulating through the whole cooling system. It is highly recommended to always use the antifreeze that’s recommended by your car manufacturer and never use water.

Keep reading: Engine cooling system: how it works and main components

Expert manufacturers of engine water pumps

One consideration to keep in mind after what we have seen in this post is that the process of choosing the right water pump brand can make a difference in engine efficiency and durability.

At Dolz we produce and distribute quality water pumps for passenger cars and industrial vehicles as part of the independent aftermarket. 

As such, we’re in charge of manufacturing more than 5.5 million water pump units per year. Our water pump catalogue includes 1,300 references: 900 for passenger cars (of which 230 are specifically for Asian applications, and another 200 for hybrid and gasoline cars) and 400 for trucks (trucks, vans, tractors, 4×4, 4×5, 4×6, 4×7, 4×8, 4×9, marine applications, forklifts, industrial engines).

Get in touch with us and discover our full range of products. 

La entrada Engine water pump: what does it do and why it’s a key component se publicó primero en Industrias Dolz.

Why is the water pump so important for the engine?

The water pump is the heart of the thermal loop, since it forces the coolant flow through the loop, according to the engine requirements. Water pumps can fail, and when they do they put your engine at risk of a severe issue.

Each engine has a water designed to assure the best thermodynamic performance; the water pump performance & dimensions must be under control to ensure the right assembly and cooling to the engine.

How to effectively identify a bad water pump

If you’re concerned about your car’s water pump, there are some common signs to look out for:

• Leaking coolant: If there are coolant drops on the front of the engine, inspect the vehicle pump properly to trace the source. It could be the gasket or the seal on the water pump shaft.
• Overheating: This is a serious condition that can be trigged due to a failing water pump. If you notice your engine is overheating it means the heat generated is not being cooled.
• Squealing/Whining noise: The noise may be an indication of a fault and could be caused by a loose drive belt or a worn-out water pump that is no longer properly functioning.

Article of interest: Failing car water pump: Signs

Water Pump Questions About Dynamic seal

The dynamic seal is the effective sealing of the water pump. It is one of the critical components of the water pump since it guarantees optimum tightness and durability of the water pump. The main different materials used for the ring are Hard Carbon (HC), Aluminum Oxide or ceramic (Alox) and Silicone Carbide (SiC).

Dolz uses HC/SiC (95% of the DOLZ range includes a Silicon Carbide Dynamic Seal) that guarantees optimum tightness and durability of the water pump.

Considered as the best-balanced solution, and even better than SiC/SiC in terms of friction, noise, and lubrication. Being the only limitation of the HC/SiC type when the cooling system is contaminated. This dynamic seal offers an excellent thermal conductivity and durability.

About impellers

Why does Dolz offer different impeller types?

The impellers manufactured by DOLZ are made from injected plastic, cast iron or aluminum passivated depending on the original OEM design. Besides, depending on the diameter, number and height of the fins, and other specifications, it will determine the type of impeller.

Impellers made of aluminum are more robust in term of mechanical and thermal resistance and have a good behavior against chemical agents, specially when we compare it with steel impellers.

About Spindle bearings

Water pump bearings can support both large axial and radial loads and come in two different types:

• “Ball-Ball” type (Symetric or asymmetric contact/Angular or radial contact) consisting of only balls. It is used to support a high load index for a limited construction space.
• “Ball-Roller” type (re-inforced) always respecting OE design or improved for a better resistance. This design offers a much higher radial load capability of the roller row.

Can my water pump leak be fixed?

As we touched on briefly, coolant leaks from the water pump are a clear sign that it’s time to replace the pump (before it fails completely and causes more components to fail along with it).

How often should I change my vehicle’s water pump?

These questions about the water pump depend on various factors such as mileage, make, model, etc. An automotive water pump can easily last from 60,000 to 100,000 miles. Here at DOLZ we always recommend change the timing belt and flush the coolant when it’s time to replace the water pump to ensure continued consistency of the Timing System.

Always refer to your car’s manual for specific recommendations and follow the original manufacturer’s fitting instructions.

Dolz water pumps: High quality standards

Dolz offers quality water pumps you can trust. With a competitive that covers over 95% of the current European parc.

Main characteristics of the range

• DOLZ range includes 1300+ references, among which 990 for cars applications & 18% only for Asian applications.
• 95% coverage of the European car parc.
• 95% of the DOLZ range includes a Silicon Carbide Dynamic Seal, that guarantees optimum tightness and durability of the water pump.
• Water pumps designed according to OE specifications.
• Automatized manufacturing process.

Get in touch for all information you need. Including our different catalogues, technical bulletins, certifications and more.

La entrada Common questions about Water Pumps se publicó primero en Industrias Dolz.

What is a timing belt used for?

Timing belts are a key component for any vehicle’s functioning (being timing chains their alternative), since these synchronize the crankshaft and camshaft in response to the opening and closing of the exhaust valves.

Timing belts have two different sides, an internal one that is characterized by being toothed and an external one that is smooth and where the tensioners are supported, which make the belt stay attached, in addition to other elements such as the water pump.

Being largely dependent on the water pump, both components require taking care off and maintenance.

Water pump and timing belt: When should I replace them?

The fact that timing belts and water pumps have such a long service interval makes it easy for users to disattend and underestimate the eventual need for a replacement of these. The dependency between both components arises from the fact that the timing belt usually drives the water pump.

Dolz recommends following the recommendations specified in the car’s owner’s manual, depending on each model, this replacement will be made sooner or later. However, a timing belt’s failure does not necessarily mean that the water pump is in bad condition. Having said this, it is strongly recommended both parts being replaced simultaneously, as per the reasons exhibited bellow. 

Related content: Expert advice: when should you carry out a car timing belt replacement

3 reasons to replace the water pump and the timing belt at once

The main three reasons are: their relationship, savings and safe maintaining. Let’s break them down:

1. Relationship between the timing belt and the water pump

Replacing the water pump or the timing belt are two of the most common operations in a workshop. While the water pump is designed as a cooling system component in charge of preventing the engine from overheating, it is driven by the timing belt and it derives its power from the crankshaft of the engine. This means that if the timing belt is in bad condition, the water pump will start to malfunction sooner than later.

On the other side, if the water pump fails independently, the belt will possibly have to be removed first anyway for the water pump to be replaced. This is because in many cases, in order to reach the water pump, the access remains past the timing belt.

2. Cost and labor savings

A joint replacement of both components will be beneficial to the vehicle’s engine and your pocket. The timing belt and water pump replacement cost is definitely something to catch an eye on.

Not replacing the water pump during a timing belt change means if the pump fails at a later stage, the investment will be close to double. The labor involved in dissembling the engine to access these parts in particular is complicated and time-consuming, and can take from a few hours to a full day of work.

Replacing both at the same time accounts for money and time saving, as much of the preparatory work and chargeable time have already been done. It is also a way of ensuring best maintenance practices and avoiding undetected failures that can result in unexpected and expensive engine repairs.

3. Ensuring a safe maintenance

Making sure the water pump is in optimal conditions is essential to avoid overheating of the engine, even though sometimes the signals might seem out of sight.

Waiting for a water pump to develop a problem is risky. Furthermore, pumps and belts need to be matched at times, and replacement kits are an ideal way to provide degrees of assurance while preventing future engine problems.

Keep reading: Common questions about water pumps

Industrias Dolz: worldwide leader in aftermarket vehicle parts

Searching for the ultimate timing belt and water pump solutions? Dolz’s range of Timing Belt Kits include everything you need to ensure the proper functioning of the engine and the cooling system.

From timing belt, to water pump, tensioners and screws required for assembly, at Dolz we put our nearly 90 years of knowledge and experience at your service to provide you an optimal replacement of your spare parts. Contact us!

La entrada Water pump and timing belt: 3 reasons to replace both of them at the same time se publicó primero en Industrias Dolz.

This article guides you through water pump leakage as a sign of engine malfunctioning, giving you all the necessary tips to prevent and react to water pump leakage and the resulting damage in the vehicle’s functioning and performance.

Water pump leaking: ¿What causes a water pump to leak?

1. Use of a wrong coolant liquid

A suitable coolant will be determined not only by the type of vehicle, but also by the climate and region where the vehicle is to be driven, thus, only the right coolant will fulfil its temperature-regulating mission.

Using the wrong refrigerant and/or mixing two different coolers can create solid residue in the circuit and cause leakage between the two contact faces of the dynamic seal. This will eventually lead to corrosive deposits that can generate clogging, cavitation damage and corrosion.

In order to choose the right coolant, it is essential to firmly consider expiry dates and follow vehicle manufacturer recommendations, as every individual engine is made of different materials and have specific needs.

2. Improper use of sealant paste

When learning how to install a water pump, remember that sealant paste is only necessary for models provided without a gasket. In such cases, be cautious, as using excessive sealant during the installation can damage the engine.

Applying the right amount of paste is crucial to avoid damaging the internal seal of the pump, as too much paste can create pollution in the system and damage the mechanical seal, resulting in water pump leakage and engine breakdown.

3. Inefficient water pump purging and/or dismantling

Never underestimate the degree to which a housing and a water pump impeller design contributes to its efficiency. Most of the wear that occurs on a water pump is on the internal parts of the unit. Experts must remove, inspect, and clean individually all auxiliary and core devices, to accurately check for wear at central parts and ensure an optimum operating condition.

Dolz’s recommended purging machine

Micrauto’s high-end technology machines eliminate at least 90% of residues in only 20-45 minutes. A highly efficient purging system that eradicates from iron oxide, to aluminum oxide and other oil residues that might cause leakage.

4. Lack of preventive maintenance

preventive maintenance should be always carried out by qualified professionals with the skills, experience and necessary tools to inspect, adjust, replace and repair any components that are not performing as intended.

Beyond this, specialists must advise end users to dig a little deeper into the condition of their water pump by carrying out routinary checks and considering best practices such as the replacement of the water pump and distribution system at the same time for a long-lasting vehicle service.

In these ways, preventive rather than corrective maintenance allows the solving of existing faults before these affect pump performances. The following offer some of the most evident and popular signs of water pump failure.

Related content: Keys to choose the best water pump company

Common signs of water pump failure

1. Coolant leaking

One of the first signs and most evident indications of a potentially faulty water pump is a puddle of colored coolant on the ground right under your parked vehicle. If the sealing of the pump cracks or breaks, the coolant will leak from the pump.

In this case, it is advisable to drive your vehicle immediately to your closest mechanic for repairing, as this can still mean a relatively easy and minor fix.

2. Engine overheating

A dying water pump cannot circulate coolant through your vehicle’s engine and, as a result, the engine will overheat. If the car temperature gauge is showing a temperature rise, it should be immediately taken to inspection.

The hotter the engine gets, the greater the chance of serious damage; including damage to the cylinders, pistons, head gasket and even resulting in engine breakdown. If you keep driving your vehicle, the damage might end up not being repairable.

Keep reading: How to detect cooling circuit problems

3. Appearance of rust and corrosion

Rust and corrosion on the water pump’s surfaces make the pump ineffective in moving the coolant. When checking your vehicle, you might spot rust or tiny holes on the exterior of the pump. If you do, it is time to replace the water pump, as a corroded or damaged one cannot operate effectively.

Yellowish and reddish coloring, white spots, incrustations and the presence of rust indicate the use of an unsuitable coolant and will eventually damage the dynamic seal, causing the pump to leak.

4. Whining noise

A high-pitched whining noise coming from the front of your vehicle’s engine when accelerating can be a sign that the water pump is failing. If the water pump components remain too loose or are worn out, the frontal part of the car will make a whining sound that some may describe as harmonic buzzing.

In many cases, the belt could be responsible for this sound. Having it replaced along with your vehicle’s maintenance schedule will keep you safe from more serious damage.

Water pump leaking: Preventions and solutions

Good quality water pumps do not leak under conditions of adequate work. Dolz’s water pumps, for instance, have its watertightness checked in a calibrated and extremely precise automatic leak detection machine. Therefore, it is important to ensure the following coolant conditions to avoid temporary leakage:

• Make sure there is no solid particles dissolved in the coolant that are smaller than 0,5mm.
• Make sure there is no air in the cooling circuit by constantly checking that the expansion vessel is within the minimum and maximum levels. Temporary pressure variations caused by air might cause a hydrostatic imbalance in the dynamic seal, causing a temporary leakage.

La entrada Water pump leaking: how to solve this problem se publicó primero en Industrias Dolz.

In addition to their efficient performance, electric water pumps consume approximately 90% less energy compared to mechanically operated counterparts. This surge in demand for electric water pumps has not only contributed to enhanced vehicle efficiency but has also played a vital role in reducing emissions, thereby fostering a safer and more environmentally friendly environment.

A new era for modern vehicle engines

As opposed to electric auxiliary water pumps, which have been market for decades, electric water pumps, acting in the main cooling system, only became available in the automotive market recently. 

The rising popularity of EVs has boosted the demand this type of water pumps, with leading vehicle brands such as BMW, Toyota of Ford incorporating them into their vehicles. 

The versatility of the electric water pumps makes them not only suitable for electric vehicles, but also for modern combustion engines. Their multiple advantages in comparison to traditional water pumps makes them a key choice for the leading players in the market. 

Where does the automotive electric water pump market stand?

As stated by Fortune Business Insights in its 2010 report, the global automotive electric water pump market is growing, and will continue to, at a compound annual growth rate of 14% in the forecasting period of 2018-2026.

The global electric water pumps market can be divided into two different segments:

• Passenger car segment: electric, hybrid and fuel cars.
• Commercial vehicle segment: vans, trucks and tractors.

The passenger vehicle segment has been the strongest in terms of electric water pumps, and it is likely to hold a significant share of the market for at least the next ten years. The rise in demand for private and utility vehicles has come along with the preference for more efficient and durable cars.

Attractive opportunities are posed on the electric water pumps industry as the buying power of consumers is increasing. Consumers are now able to access and easily understand information and features regarding their buying options. The will to spend wisely has positively impacted the preference for cost-effective, environmentally friendly, and low toxic products. Whereas branding and aesthetics were powerful demand drivers in the early 2000’s, the market trend is boosting on quality and practicality.

Although the recent effects of the COVID-19 crisis led the global material supplier industry to suffering serious disruptions, such as supply chain breaks and office shutdowns, the supply side of the electric water pumps market is predicted to recover its normal functioning this year, with an increasing reliance on the automotive aftermarket industry.

Keep reading: Characteristics and Benefits of an automotive electric water pump

Keys on the evolution of the electric water pump market

Innovative modern technologies

New technologies have been adopted globally in vehicles design. This has urged the need for vehicle manufacturers to implement technology in their production processes in order to ensure operating reliability and service life of vehicles. 

Automotive water pumps play an essential role in this sense, as they are reliable over a longer life span, while minimizing wear & tear hazards. New technologies are therefore promoting a positive outlook for the further growth of this market.

Increase in demand for fuel-efficiency

Emission reduction and fuel efficiency are no more a trend, but rather a need. Consciousness regarding the environment, together with government requirements and regulations are expected to drive the electric pump market. 

Electric water pumps power system dramatically decreases load and stress levels in the engine, thus highly increasing results and durability. Furthermore, matching its output to actual cooling requirements of the combustion engine can reduce exhaust emissions and fuel consumption significantly.

Forecast of market trends in the upcoming years

Industry experts expect that the market will continue growing in the long-term. According to recent reports, such as the Global Electric Water Pumps Market report by Market Watch, the market is expected to stabilize at a 10.3% CAGR in the forecasted period 2021-2027.

Major companies in the global automotive electric water pumps market are increasingly focusing on research and development activities to create new and innovative products that secure them staying ahead of the competition.

Only this way will companies be able to make a difference and fight against real-life concerns such as ambient air pollution.  Fuel efficiency must therefore live at the heart of vehicle manufacturing, and the only way through is by using electric water pumps.

Know more about Dolz’s electric water pumps

DOLZ is in charge of producing and distributing automotive water pumps for passenger and commercial vehicles in the aftermarket. With more than 5,5 million pumps being produced per year, we are proud to count with more than 1.300 references.

Our electric water pumps highly reduce emissions from modern engine. Their supply flow is independent from the number of engine revolutions, allowing cooling as required and reducing fuel consumption and pollution.

Dolz’s electric water pumps meet the highest possible standards, as they are OE equivalent. At our fully automated plants we work to ensure premium quality, extreme durability and a completely personalized service. 

Contact us if you would like to have further information about our products:

La entrada Market trends on the electric water pumps industry se publicó primero en Industrias Dolz.

La entrada Types of automotive water pumps se publicó primero en Industrias Dolz.