Car Thermostat Replacement at your home or office

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$117.97 - $588.64

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How much does Car Thermostat Replacement cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2008 Bentley Azure $300 $187.97 $111.98 11% $338.47
2006 Chevrolet Aveo5 $268 $188.21 $79.99 9% $295.71
2011 Volkswagen Touareg $403 $123.17 $279.96 19% $499.42
2009 Land Rover LR3 $149 $68.66 $79.99 15% $176.16
2015 BMW 640i Gran Coupe $435 $283.05 $151.98 10% $487.30
2012 Porsche Cayenne $259 $98.54 $159.98 17% $313.54

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Car Thermostat Replacement Service

What is an engine cooling system thermostat and how does it work?

The car's engine cooling system thermostat is a small valve within a cooling system passageway that opens and closes in response to the temperature of the circulating engine coolant. When your car is first started and the coolant is cold, the valve in the thermostat will be in the closed position, circulating the coolant flow only within the engine instead of flowing to the radiator, which allows the engine to warm up fast, promoting fuel efficiency, low emissions, and reduced engine deposits. Once the engine coolant reaches the design temperature, usually around 195 degrees, the valve will open and close as you drive in order to maintain a coolant temperature typically between 195 to 225 degrees Fahrenheit.

Thermostat

When to consider replacing the engine cooling system thermostat:

  • Engine overheats. A thermostat with the valve stuck closed is a common cause of engine overheating. However, since there are other causes of overheating, a mechanic will thoroughly inspect the cooling system prior to condemning the thermostat. Since it is usually not known how badly the engine overheated, the mechanic will also try to determine if there is evidence that the cylinder head gasket was blown. If so, it would be repaired prior to replacing the thermostat.
  • Temperature gauge reads too low or too high. Thermostats can get sticky, causing the engine temperature to stray from the optimal range. Your dash-mounted temperature gauge will notify you of this malfunction.
  • Cooling system repairs. All thermostats eventually fail. Therefore, if the cooling system is already open for major repairs, such as water pump or radiator replacement, it is recommended to install a new thermostat simply as insurance against future breakdown.

How do mechanics replace the engine cooling system thermostat?

  • Once the engine is completely cold, the radiator cap is loosened and enough coolant is drained from the radiator so the coolant level is below the thermostat housing.
  • The thermostat housing is removed and the thermostat and gasket are extracted. Note that some cars have more than one cooling system thermostat and both might need replacement.
  • All mounting surfaces on the thermostat housing are cleaned of old gasket material. A new gasket is applied and the thermostat is re-installed in the correct orientation and with the temperature sensing cylinder facing downward towards the engine.
  • The thermostat housing bolts are tightened to original equipment manufacturer (OEM) specifications using a calibrated inch-pound torque wrench.
  • The cooling system is refilled with the appropriate coolant type and the system is fully bled of all air.
  • The car engine is run until the normal operating temperature is reached, and while taking precautions with the hot coolant, the coolant level is rechecked while confirming there is flow through the radiator — either visually or with an infrared temperature gun. This will confirm the thermostat is open. Finally, the engine is checked for leaks.

Is it safe to drive with an engine cooling system thermostat problem?

No. If it has been determined that there is a thermostat problem, it should be repaired right away. Failure to do so can cause substantial and costly damage to the engine.

When replacing the engine cooling system thermostat keep in mind:

  • Engine overheating due to causes other than a faulty thermostat, will themselves damage a thermostat. Therefore, always replace the thermostat if the engine overheats, even if the thermostat was not the initial cause of the overheating.
  • The thermostat should be replaced anytime you have major work done on the coolant system. It is convenient and costs little during such repairs and insurance against future breakdown.
  • OEM thermostats are the best ones to use and you can request your mechanic to install only the OEM thermostat. Dealer supplied, OEM thermostats are sometimes more costly but are generally higher quality and specifically engineered for your car.

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Recent Car Thermostat Replacement reviews

Excellent Rating


YourMechanic Car Thermostat Replacement Service

Average Rating

4.9/5

Number of Reviews

1,768

Rating Summary
1,665
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1,665
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Benji

21 years of experience
104 reviews
Benji
21 years of experience
Chevrolet Trailblazer - Thermostat - Scottsdale, Arizona
Benji was very efficient and effective. He is very meticulous and careful with your car. He is knowledgeable and pleasant to interface with and is an awesome mechanic. I will be requesting him in the future as my mechanic.
Kia Borrego - Thermostat - Mesa, Arizona
Benji was incredibly helpful & more than knowledgeable about my vehicle (which was only made for 1 year in the states, so parts are split between 2 manufacturers). He was no pressure, quick to complete & happy to show me everything that he was doing & other services needed.

Chris

21 years of experience
1723 reviews
Chris
21 years of experience
Ford Edge - Thermostat - Tustin, California
Arrived early. Explained his Diagnostic steps and was easy to understand. The price was very fair. Best part of a great first time experience with this site. He was fast and he’s gained my trust.
Ford Escape - Thermostat - Corona, California
Chris came early, was quick and efficient. Apart from that he explained all the steps he took to fix what was wrong with my car.

Chuy

13 years of experience
157 reviews
Chuy
13 years of experience
Dodge Grand Caravan - Thermostat - Evergreen Park, Illinois
Friendly professional who explains in layman's terms what the problem is and what it's going to take to fix it.
Volvo V50 - Thermostat - Chicago, Illinois
Chuy was super friendly, down-to-earth, and easy to work with. I felt I could trust his opinions more than if I had taken my vehicle into a standard shop.

Justin

7 years of experience
332 reviews
Justin
7 years of experience
Chevrolet Cruze - Thermostat - Delray Beach, Florida
Professional and answered all questions. I felt very confident in his abilities. Thank you Justin for your work great job.

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