Car Auto Thermostat
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Rich Experience
XC Electronics (Shenzhen) Corp. Ltd is a leading industrial manufacturer that develops and manufactures all kinds of fuse and thermostat since 2002. The Hong Kong company named XGH ELETRIC COMPANY was founded in 1996.
Wide Range of Products
The products ranges miniature fuses, micro fuses, SMD fuses, power fuse, plug fuse, high voltage fuse, blade fuse, fuse holders, thermostat and thermal sensors for circuit protection and thermal protection solutions.
Professional Team
We have a stable R&D team with 30 people, each with more than 5 years' work experience. They can independent research and develop products and equipment.
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With vertically integrated manufacturing facilities certified TS16949, ISO9001, and ISO14001, All the products are lead-free that complies with RoHS Directive and REACH regulations. The products are extensively certified by CCC, VDE, cULus, PSE, KC, TÜV, CQC, ect.
What is Car Auto Thermostat?
For your car’s engine to run properly, it needs to be kept at a certain temperature. The car’s cooling system looks after this, and one of its most crucial parts is the humble thermostat.
Located between the radiator and the engine, its job is to make sure that the car’s coolant goes where it’s needed, so that the engine can run at a safe and optimal temperature.
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The automotive car electric thermostat operates based on the principle of thermal expansion. It contains a wax pellet that expands when it heats up, causing a valve to open and allowing coolant to flow through the engine. When the coolant cools down, the wax pellet contracts and the valve closes, restricting the flow of coolant.
The thermostat such as a wax thermostat is designed to maintain the engine's temperature within a specific range, typically between 180 and 220 degrees Fahrenheit. If the engine is too cold, the automotive car electric thermostat will restrict the flow of coolant to allow the engine to warm up quickly. Once the engine reaches its optimal temperature, the automotive car electric thermostat will open fully, allowing coolant to flow freely through the engine and maintain its temperature.
Why a Thermostat is Important
A functional thermostat is essential for several reasons, including:
Enhanced performance
By maintaining the engine at its ideal temperature, the thermostat ensures that the engine runs efficiently. This leads to smoother performance and can even boost fuel efficiency.
Reduced emissions
Engines that operate within their optimal temperature range produce fewer emissions. This is because the combustion process is more complete, reducing the release of harmful pollutants
Prevention of overheating
Overheating is one of the most common causes of engine damage. The thermostat helps prevent this by ensuring that coolant circulates through the engine when it reaches high temperatures.
Prolonged engine life
By preventing extreme temperatures, the thermostat contributes to the longevity of the engine and its components. This can save car owners significant money in repair and replacement costs over time.
A malfunctioning thermostat can lead to various issues, including engine overheating, underheating, or erratic temperature fluctuations. Some signs that may indicate a faulty thermostat include:
Engine overheating: If the thermostat is stuck in the closed position, it prevents coolant from circulating through the radiator to be cooled, causing the engine temperature to rise rapidly. This overheating can cause serious damage, including warped cylinder heads, blown head gaskets, and, in severe cases, complete engine failure.
Engine running too cold: If the thermostat is stuck open, it allows coolant to flow freely through the engine and radiator, preventing the engine from reaching its minimum operating temperature. An engine that runs too cold is inefficient, leading to poor fuel economy.
Fluctuating engine temperatures
Fluctuating engine temperatures could be the result of a thermostat that is opening and closing irregularly. This could, in turn, confuse the engine's computer, leading to poor performance, reduced fuel efficiency, and increased emissions.
Unusual temperature gauge readings
The temperature gauge on your car's dashboard can be the first sign of a faulty car thermostat. Unusual readings or significant fluctuations should prompt a check of the thermostat and the cooling system.
Increased fuel consumption
When the engine doesn't reach optimal temperature, it can run less efficiently, requiring more fuel to maintain performance.
How to Change a Car Thermostat in 10 Simple Steps
Step 1 – Prep the Vehicle
When the car is parked on a level surface and the engine is cold, disconnect the battery. Raise the vehicle on jack stands and open the bonnet.
Tip: Grounding the battery by removing the negative terminal before any job is always a sensible idea. This way, you won't accidentally complete the circuit and give yourself a shock.
Step 2 – Drain the Coolant
Unscrew the radiator cap and drain the coolant into a large container. You can learn more about how to do this in our "Complete Guide on How to Flush a Car Radiator." Remember that coolant fluid is considered hazardous waste and must be disposed of at the appropriate recycling facility.
Tip: If the coolant is fresh and in good condition, you can collect it in a secure container and reuse it. If not, you will be better off using a new coolant mixture.
Step 3 – Locate the Thermostat
It's typically located at the end of the cylinder head as viewed from the driver's seat. Depending on the make and model of your car, you may need to remove other housing or parts—such as the air filter assembly—to access the thermostat. You can refer to your car owner's manual for assistance.
Step 4 – Disconnect the Hoses and Any Sensors
Remove any fittings, screws, or pins holding the upper and lower radiator hoses in place and disconnect them from the thermostat housing. If this is tricky, carefully insert a thin, flat-head screwdriver between the hose and the fitting to help loosen it. Coolant may spill out when you do this, so have your bowl or basin ready to catch any liquid.
Disconnect any other hoses, the coolant temperature sensor, and any other sensors or cables linked to the thermostat. Once everything is disconnected, examine the hoses for damage or corrosion; if so, they will need replacing.
Step 5 – Remove the Car Thermostat Housing
Unfasten any spring clips or pins and use a socket wrench to unscrew the mounting bolts holding the thermostat housing in place. Your owner's manual can help you locate these if you have difficulty finding them. Use the correct socket size to avoid rounding off the bolt heads. Once removed, set the bolts aside.
Step 6 – Remove the Old Thermostat
Lift off the thermostat housing. Before removing the thermostat, take a moment to note how it aligns inside the housing, as the replacement must be installed in the same position.
Tip: If lifting the thermostat housing proves difficult, tap it lightly with a wooden stick or tool to loosen it—but be very gentle, as the housing is often made from aluminum or plastic and can easily be dented or damaged.
Step 7 – Clean the Mating Surfaces and Apply New Seals
The mating surfaces must be spotless, so wipe them with a soft cloth—taking care not to scratch or damage them. It may help to use a plastic scraper to remove stubborn traces of the gasket or sealing compound.
Fit new seals. If the gasket or seal requires a sealing compound, apply this no
Step 8 – Fit the New Thermostat
Compare the new and old thermostats—they should be of identical size and shape. If they match, install the new thermostat. When inserting the thermostat, ensure the bleed pin points in the same direction as the old one.
Step 9 – Secure the Housing and Refit the Pipes and Hoses
Replace the housing and gasket or seal, positioning them in the engine compartment. Tighten the thermostat housing nuts alternately to avoid damaging the housing. Be careful not to overtighten them—you should be able to find torque values for them in your owner's manual.
Refit all hoses, pipes, and the coolant temperature sensor, and secure them. Refit any parts or housing you removed to access the thermostat.
Step 10 – Finally, Refill the System With Fresh Coolant
Remember to bleed the system to remove any air bubbles. You can follow our "Complete Guide on How to Flush a Car Radiator" for assistance.
Overheated Engine
The thermostat is an integral part of the engine’s cooling system because, without it, the engine will overheat and eventually result in total loss or failure. If the thermostat remains closed, the coolant will not flow into the radiator, preventing the cooldown process. But of course, an overheating engine may be due to many other reasons, like a faulty water pump or low coolant levels.
Engine Not Warming Up
On the other hand, if the thermostat becomes stuck in the open position, the coolant will flow back and forth between the engine and the radiator. This results in a scenario where the engine takes longer to reach optimal operating temperatures. This will lead to less efficient engine oil consumption and faster wear and tear. Plus, this will also reduce fuel economy, especially for vehicles with an electronic fuel injection system.
Temperature Fluctuations in the Engine
Fluctuations in the engine temperature usually point to a faulty thermostat – it’s likely not opening or closing when it’s supposed to. This happens because the thermostat doesn’t stay open or closed, which leads to temperature fluctuations and false readings. This issue may also stem from air bubbles in the system, which can be eliminated by bleeding the cooling system
Underperforming Engine
A faulty thermostat may still allow you to drive your vehicle, but not in an optimal manner. When there’s something wrong with your thermostat, there’s a good chance it will affect the engine’s performance. One of the most apparent side effects is poor fuel efficiency. Again, this issue may be due to a dozen other factors, but it’s always good to check your thermostat.
How to Test a Car Thermostat
This method involves placing the thermostat in a pot of water, bringing it to a boil, and observing its performance.
》Remove the thermostat from your vehicle. This usually requires some basic tools and might involve disconnecting the housing and hoses. Catch any 2.coolant that leaks out. Take note of how each component is positioned for reassembly.
》Inspect the thermostat visually to see if it’s stuck in an open or closed position. A fully open thermostat when the engine is cold is almost always faulty.
》In a pot large enough for your thermostat, bring clean water to a boil, then gently add the thermostat, submerging it fully.
》Use a thermometer to measure the temperature of the water once it’s boiling, and start the stopwatch.
》The thermostat should begin to open at the designated temperature, which you can verify based on your model’s specifications. If it doesn’t open, it’s likely faulty.
》If the thermostat tests good, reinstall it with a new thermostat gasket.
Our Factory
XC Electronics (Shenzhen) Corp. Ltd is a leading industrial manufacturer that develops and manufactures all kinds of fuse and thermostat since 2002. The Hong Kong company named XGH ELETRIC COMPANY was founded in 1996. The products ranges miniature fuses, micro fuses, SMD fuses, power fuse, plug fuse, high voltage fuse, blade fuse, fuse holders, thermostat and thermal sensors for circuit protection and thermal protection solutions that are widely used in powers, household appliances, lightings, batteries, new energy resources, automotive equipment, communications devices and computers.
FAQ
We're well-known as one of the leading car auto thermostat manufacturers and suppliers in China. If you're going to buy high quality car auto thermostat at competitive price, welcome to get more information from our factory.