As a result, more and more manufacturers are incorporating an electronic thermostat control in their final products, increasing their durability and precision.

Keep reading to find out more about the MAP-controlled thermostat and its main benefits.

Map Controlled vs Conventional temperature regulation

Depending on the application and technology of the combustion engine, thermostats must exhibit different functional characteristics and ways of functioning.

To increase engine efficiency, a new electronically controlled thermostat technology was developed. This type of thermostat can be understood as an improvement on conventional thermostats, characterized by a wider working range.

An electrically controlled thermostat (MAP) works in the same way and has the same mechanical structure as a conventional thermostat, but its main difference is that the map-controlled thermostat also works at a higher engine temperature.

It also complements the conventional regulation of the cooling circuit by means of an electrically controlled integrated heating element that is activated on demand. Consequently, the thermostat can influence the temperature considerably faster.

As such, the result is a higher and more precise influence of the thermostat on engine temperature, which adjusts to particular engine conditions and needs, all while meeting optimum temperature ranges.

All in all, while the function of map-controlled thermostats is the same as conventional thermostats, they provide a series of unmatched benefits: 

• Stabilize engines even at higher temperatures.
• Greater and more instant power responses.
• Optimized combustions, regardless of coolant temperatures.
• Minimized emissions and pollution, thanks to better combustions.
• Less fuel consumptions, as engine viscosity is reduced and so are frictional losses.
• Enhanced interior heating in cars and higher user comfort.

This improved regulation of the cooling system helps manufacturers meet increasing pressures to minimize pollution and increase engine efficiencies.

Related content: Official unboxing of the new Dolz’s automotive thermostats

How a map-controlled thermostat works

(MAP) Controlled Thermostats are controlled by the engine’s Electronic Control Unit (ECU).

Traditional versions incorporated a wax component to act as an expansion and heating element. When temperatures rise, this wax component increases its size and starts a moving system where pistons are in charge of increasing flow volumes in the coolant liquid. What map-controlled thermostats do is integrate an electrical interface and heating coil in the equation, which are in charge of connecting the expansion element to the heating. 

During standard operations, the map controlled thermostat works the same way as conventional ones, only they allow higher engine temperatures. 

Additionally, when sensors detect an expanded need based on the engine’s loads, the thermostat opens accordingly. This can happen when the control system for the powertrain detects a higher engine load, a faster vehicle speed or the activation of the sport mode. In that case, the wax element will quickly open up the thermostat to its maximum position thanks to heating, and coolant temperatures will be able to be lowered.

Thus, while map-controlled thermostats also employ expanding wax, they are able to better control the temperature of said wax, doing so in a faster manner. The result is an engine that performs efficiently at multiple load and operating conditions.

Advantages of map-controlled thermostats in the aftermarket

The main benefit of this type of thermostat is the ability to open the thermostat before the coolant reaches too high an operating temperature. To do this, the engine’s control unit will activate it before the coolant reaches a certain temperature. This fact becomes very useful when the vehicle is under certain conditions, such as the sport mode.

Map-controlled thermostats not only generate less pollution and greater engine efficiencies: they’re also extremely durable, they don’t present natural wear and perform without required service or maintenance. In other words, they can last for the entire service life of an engine.

Article of interest: 5 thermostat failure symptoms and how to avoid them

However, improper practices or factors such as the use of low-quality coolant can cause damage to the part. At Dolz, we remind you of the importance of the cooling system, and we always recommend that when replacing the water pump or bleeding the cooling system, you check how to test a thermostat in a car. This ensures that all components are functioning well, preventing engine overheating and possible future breakdowns.

DOLZ thermostats for a perfect temperature and flow

As the independent aftermarket industry evolves and navigates increasingly complex conditions and requirements, the challenge to find a suitable manufacturer and supplier is more important than ever.

Keep reading: Thermostat: Discover its key elements

At Industrias Dolz we work with the firm commitment to guarantee the supply of high-quality spare parts for both transmission and the vehicle’s cooling, including the electronically controlled thermostat.

Highlighting our products for:

• Use of premium materials that improve durability and reduce maintenance needs.
• Quality production processes and in-house production …All in Dolz.
• A constant investment in innovation through our dedicated R&D department.
• Decades-long experience in the aftermarket sector. Manufacturing since 1934

For further information on any of our product lines, receive commercial information or technical product specifications (including assembly notes), plese please contact us and our team will help you.

La entrada Map-Controlled Thermostat: How It Works & What Are Its Benefits? se publicó primero en Industrias Dolz.

In this article, we explore the role of the engine coolant thermostat and its simple but necessary mechanism. In addition, we provide you with easy methods to check thermostat car issues and ensure your cooling system is working efficiently.

Engine coolant thermostat: What is it and how does it work?

The engine thermostat might be a simple and small device but plays an oversized role as a crucial component of a vehicle’s cooling system. Its main job is to control the coolant flow towards the radiator, deciding when and how the heat is added, increasing engine combustion efficiency, and reducing emissions.

Keep learning: Car temperature: Key aspect in a vehicle’s performance

A traditional thermostat contains a wax that’s compounded to melt at a certain temperature. As the engine temperature rises, the wax melts and expands causing the thermostat to open and coolant to flow. When the engine temperature drops, the wax cools and contracts, causing the valve to close. Engine thermostats have a temperature rating at which they open or close, this rating differs from vehicle to vehicle.

However, modern systems use a map controlled engine cooling thermostat, which allows for more precise control over the engine’s temperature. This system adapts to various engine conditions, improving efficiency and performance by controlling the coolant flow based on the engine’s operating map.

How to test thermostat car

There are several ways to check the health of your car’s thermostat and you don’t necessarily have to remove it: observing the coolant flow or measuring the temperature of the upper and lower radiator hoses with an infrared thermometer.

Here’s how to check thermostat car performance effectively:

1. Check if the thermostat is stuck closed.

Watch the flow of coolant through your radiator. If the hose is cool, there would be no flow even after the engine reached the operating temperature, and the lower radiator hose would remain cool. It’s probably a sign that you have a stuck closed thermostat that needs replacement.

Watch the flow of coolant through your radiator. If the hose is cool, there would be no flow even after the engine reached the operating temperature of engine, and the lower radiator hose would remain cool. It’s probably a sign that you have a stuck closed thermostat that needs replacement.

Article of interest: 5 thermostat failure symptoms and how to avoid them

2. Check if the thermostat is stuck open.

The most basic test you can do is to start the engine on your car and allow it to idle for 10-20 minutes to reach its optimal running temperature. After several minutes, you will see that the temperature goes high while the engine is operating. The first thing to do is to examine the radiator hose. If the thermostat is stuck open, the lower radiator hose will start warming up as soon as the engine is started.

3. Valve’s test: testing by heating in hot water.

A quick and easy way to check the thermostat is also to remove it from the engine and test it by heating in hot water. This is one of the most accurate methods to test thermostat car performance.

First off, with the help of a thermometer, heat water until it is at least twenty degrees above the open temperature of the thermostat. Then, get the thermostat and drop it in the pot of hot water (make sure it’s deep enough to cover the whole thermostat) and carefully lower it into the water and observe it: at the temperature marked on the thermostat, it should quickly open the unit. If it does not fully open, it is stuck.

Recommended for you: Thermostat: discover its key elements

Is your thermostat stuck?

The main problems a thermostat can experience are being stuck in an open or closed position. In any case, the thermostat replacement should be carried out with a new one if it’s faulty.

• A thermostat that is stuck open: If it’s stuck open, it’s definitely going to cause some problems for you. In this scenario, the flow of coolant will be unrestricted throughout your engine and the engine warms up with difficulties. In this case, you’ll notice a significant performance drop, low power and torque.

• A thermostat that is stuck closed: If the thermostat is stuck closed, coolant flow is disrupted and coolant cannot get through the radiator causing the engine to overheat, which also influences fuel consumption. This can lead also to the damage to cylinder-head gaskets.

Dolz thermostats: Proven reliability and premium qualit

All Dolz thermostats are integrated thermostats that adjust the flow of coolant towards the radiator, deciding when and how heat is added and are designed according to OE specifications:

• Proven reliability. 100% tested.
• Premium quality. ISO 9001:2015 Quality management system.
• Optimal design for maximum efficiency.

So, if you experience that your car overheats soon after starting it, or the dashboard’s temperature gauge goes below normal, make sure to get your thermostat replaced.

For further information on any reference, receive commercial information or technical product specifications (including assembly notes), contact us! Keep your vehicle running smoothly by staying ahead of potential cooling system issues!

La entrada Understanding and testing the engine coolant thermostat se publicó primero en Industrias Dolz.

Do you want to learn how to detect thermostat failure symptoms or how to check thermostat car? Keep reading!

The thermostat acts as the temperature control device in any engine cooling system. Thermostats are in charge of constantly monitoring coolant temperature. When required, they regulate the exact flow of coolant that must pass through the radiator for a constant and optimal engine operating temperature.

Thermostats use a rather simple mechanism; they open or block the flow of coolant to the radiator according to its temperature. This way, the thermostat valve blocks the flow of coolant when the engine needs warming up, while it allows the coolant to flow when the engine’s temperature needs colling down.

Why is it important to check the thermostat for failure symptoms?

Preventing our vehicle’s thermostat from failing requires taking into account some considerations. One of these will be to ensure that the coolant is replaced regularly and carefully so that air does not enter the system as this would lead to overheating and/or faulty sensors.

Another factor to consider in preventive maintenance is visual inspection. Dolz recommends inspecting the thermostat at the same time as the water pump and timing belt. Replacing them in one single operation will ensure that the valves are mounted in the correct position and that necessary fixings are avoided.

Related content: Thermostat: Discover its key elements

Thermostat failure symptoms that you should know

1. High temperature readings

The main symptoms of a failing thermostat are related to engine overheating. It can be easily noticed because the temperature gauge in the vehicle will probably read unusually high. This can be caused by the valves being stuck in a closed position. As a result, the coolant will not be able to flow and overheating will damage the engine.

2. Erratic changes in temperature

Thermostat failure will commonly cause the whole cooling system functions erratically and fluctuates. Keeping an eye on the dashboard’s temperature gauge will allow you to realize if the needle spikes and drops. If this happens, it is probably due to temperature confusion caused by the failing thermostat. One of the bad thermostat symptoms related with the temperature is overcooling. It’s the opposite of overheating: the engine never reaches operating temperature. This happens when a thermostat gets stuck open and it causes its fair share of issues as well. 

3. Leaking coolant

The coolant helps to keep the engine functioning at the right temperature, and the lack or imbalance of the fluid can affect its performance. If the vehicle’s coolant leaks out of the thermostat’s housing or under the vehicle, there is a big chance that the air is getting into the system or that the coolant is escaping it. But keep in mind coolant can leak from different parts, don’t automatically assume it’s coming from the thermostat housing.

4. Increased fuel consumption

Both engine overheating and engine overcooling can largely increase exhaust emissions and damage fuel economy. This happens because the vehicle is not able to reach its operating temperature. In this case, thermostat failure symptoms will most probably be translated into an increased fuel consumption and a resulting unexpected spike in monthly utility bills. 

5. Unusual noises

Sounds coming from the engine, from the vibrator or from both could easily be symptoms of a failing thermostat. Gurling, knocking and rumbling sounds might be the result of boiling coolant caused by a stuck valve or by a worn-out thermostat.

You may like: Official Unboxing: New Dolz’s thermostats 

Have you found any thermostat failure symptom?

As an experienced manufacturer and distributor in the aftermarket sector, Dolz has a complete range of thermostats designed according to the specifications of the original manufacturers and using the latest technology.

All our thermostats are integrated thermostats that adjust the flow of coolant towards the radiator, deciding when and how heat is added and are OE equivalent:

• Proven reliability. 100% tested.
• Premium quality. ISO 9001: 2015 Certificate.
• Optimal design for maximum efficiency.

If you detect any of these thermostat failure symptoms and need to change your thermostat, don’t hesitate and ask for a Dolz spare part!

Contact us for more information.

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Its operating principle is the heat generated during fuel combustion, which migrates to the engine components, is transmitted to the coolant. So, the cooling system serves three important functions. First, it removes excess heat from the engine; second, it maintains the engine operating temperature where it works most efficiently; and finally, it brings the engine up to the right operating temperature as quickly as possible.

This system is composed of five main parts—a radiator, a water pump, a cooling fan, hoses, and a thermostat. And it is precisely this last component that we focus on in today’s blog. Read on to learn why this small but essential component should not be underestimated.

Read on to learn more about an engine’s thermostat, as well as how to detect a damaged thermostat and how it protects our engine from damages due to overheating.

Importance of a properly operating thermostat

Thermostat is one of the most misunderstood parts of a car despite this device was a decisive improvement to engine cooling. The engine is designed to be maintained at a stable temperature, which is the purpose of the thermostat, vital for regulating your vehicle’s temperature across a range of operation conditions. It is placed between the engine and the radiator to make sure that the coolant stays above a certain preset temperature. Without this part, the engine would always lose heat to the radiator and take longer to warm up.

In order to keep your engine in top condition, you need to keep your car thermostat in good condition as well. Besides, by performing its function properly, will be an advantage in the following areas:

• Will reduce engine wear.
• Engine overheating will be avoided.
• Will save the driving force from many other hazards.
• Will improve fuel economy.

Should I Change a damaged thermostat?

The car thermostat is basically like a temperature sensor for your engine. Once the thermostat goes bad, it is no longer able to sense the right temperature in your engine.

Certain installation problems can both shorten the lifespans of thermostats and affect their ability to get accurate temperature readings. Unfortunately, engine thermostats can, and do fail from time to time. That’s why, in light of the above, it is highly recommended that the thermostat is properly maintained. If you’re unsure how to check if thermostat is working, inspect it for temperature regulation issues or unusual coolant flow behavior.

The lifespan of a car thermostat can easily cross 10 years or more. Hence, it’s not easy to answer how long a car thermostat lasts.

Signs of a damaged thermostat

There are a few easily recognizable signs that your cooling thermostat may have given up the ghost and needs fixing, so keep an eye out for the following bad thermostat symptoms:

• Unusually high temperature reading.
• Air temperature changes.
• Your vehicle makes concerning noises.
• Leaking coolant. If the coolant can’t reach the radiator, it can eventually damage the hoses and cause leaks.
• Heater problems.

The importance of vehicle inspection cannot be overstated, so, now that you know how important a car’s thermostat is and, because so many other engine parts rely on the thermostat’s functionality and readings, you should be sure to get the thermostat looked at or replaced if you think it might be faulty. Otherwise, your engine could suffer irreversible damage and other serious problems.

Stay tuned to the DOLZ’s leading blogs for more information on car parts, market trends and latest news.

 Click and whatch! Dolz Thermostats Unboxing.

Why choose Dolz?

Once again, at Industrias Dolz, we combine the latest technology with coordinated planning and flexible production, which allows us to provide our customers with the best possible service and quality.

All our thermostats are integrated models that regulate the coolant flow towards the radiator, determining when and how heat is managed. Most of our thermostats feature a map-controlled thermostat system for optimized performance.

About us

Our experience of almost 90 years in the aftermarket sector allows us to offer innovative solutions and a competitive range of products that meet the highest quality standards.

With a global presence in more than 70 countries worldwide, Industrias Dolz has 3 manufacturing plants located in Spain (Castellon), Argentina (Buenos Aires) and China (Shouzou) and different commercial offices.

Having a full implemented manufacturing processes ‘under one roof’, we can guarantee the total quality of our products, since all processes have quality validations, supplies and reduced lead-times. It has also been possible thanks to the implementation of the Lean Manufacturing method in our facilities.

La entrada Don’t Ignore a Damaged Thermostat: What you could be missing se publicó primero en Industrias Dolz.

In today’s article we get to know its simple but necessary mechanism and discover its key elements of this small component.

Operation and types of thermostats

Among the main functions of the thermostat are to accelerate engine warm-up blocking cooling and to regulate the temperature by opening and closing its mechanism in response to specific changes in coolant temperature to keep the engine’s temperature.

For this, there are different kinds of thermostats depending on the vehicle application. And its mechanism differs from each other.

• Conventional thermostat

Formed by a spring, this kind of thermostats are characterized by containing alcohol inside and thus actuate their mechanism by the volatility and not through the expansion of a liquid.

When the cooling liquid reaches a high temperature, there is a liquid-vapour transition that expands the spring.

• Wax-type thermostat

Its main element is an encapsulated wax, thermally expansive and in contact with the cooling liquid. Its mechanism is based on expansion.

Upon reaching a specific temperature, this wax melts and expands the capsule, opening the valve that gives way to the cooling liquid. As it cools, it contracts again, closing the mechanism.

• Map-controlled thermostat

Controlled by the engine’s electronic control unit (ECU), these thermostats operate their mechanism based on the engine’s loads.

This kind of thermostat allows some benefits like reduced fuel consumption and lower pollution emissions by improving engine efficiency.

Related content: Video Unboxing: new Dolz’s thermostats

Key elements of a thermostat

The basic parts of a thermostat are:

• Frame and Housing: includes a valve attached to the piston.
• Flange: located in the body.
• Spring: keeps the valve closed when the coolant is not hot.
• Wax element: thermostat core.

To avoid entrapment of air and hot spots, many thermostats have a jiggle pin or check valve that allows trapped air in the cooling system to pass through the thermostat and be released.

Failing thermostats

Among the thermostat failure symptoms are those related to stuck. This could be:

• Stuck in the open position of the thermostat.

In this case, overcooled engine runs inefficiently. It means, it is not capable of storing the coolant to bring it to the optimum temperature, which also generates higher fuel consumption.

• Stuck in the closed position of the thermostat.

Due to the blockage of the coolant circulation, the coolant is not able to reach the radiator so causes the engine to overheat. This can lead to damage to the damage to cylinder-head gaskets.

Discover the Dolz Thermostat Range

With a constantly extension range, all Dolz thermostats are equivalent to OE quality.

All our thermostats are integrated thermostats that adjust the coolant flow towards the radiator, deciding when and how heat is added. Most of our thermostats are map-controlled. We also have thermostats attached to the water pump and can be purchased in kit format.

Dolz, your safety choice

La entrada Thermostat: Discover its key elements se publicó primero en Industrias Dolz.

An innovative packaging as well as highly shock resistant and with several remarkable details:

• Holographic sticker, safety seal label for package.
• Label designed to facilitate product storage and successful distribution. Contains detailed information about the product: EAN and QR code; Product image; Reference Dolz.
• Inner packaging. Internal packaging to secure your product during transport and guarantee the highest quality.
• Complete product information in 4 different languages.

The entire range has the same packaging performance. In addition, all references are quickly identified as a product of Industrias Dolz, ensuring the quality of the product, by having our engraved logo on the thermostats.

Our knowledge of nearly 90 years in the aftermarket and our firm commitment to quality allow us to continue growing together with our customers, suppliers, and collaborators.

La entrada Official unboxing of the new Dolz’s automotive thermostats se publicó primero en Industrias Dolz.