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Automotive and Mechanics

How to Replace Your Car’s Thermostat

If you’ve noticed that your car’s engine is overheating, it could be a sign that your thermostat is failing. The thermostat is an essential part of your car’s cooling system, and if it’s not functioning correctly, it can lead to serious engine damage.


If you have observed that the engine in your vehicle is overheating, this could be an indication that the thermostat needs to be replaced. If the thermostat in your vehicle is not working properly, it can cause severe damage to the engine. The thermostat is a crucial component of the cooling system in your vehicle.

Changing out the thermostat in a car is, thankfully, a job that can be accomplished with only a few fundamental tools and takes only a short amount of time. The replacement of a car’s thermostat can be accomplished by following the instructions outlined in this tutorial.

How to replace a car’s thermostat in 7 steps

Step 1: Gather Your Tools and Supplies

Before you get started, you’ll need to gather a few tools and supplies. You’ll need a new thermostat, a gasket (if necessary), a screwdriver, a pair of pliers, and a drain pan to catch any coolant that may spill out.

Step 2: Locate the Thermostat Housing

The thermostat is typically located in a housing at the engine’s end of the upper radiator hose. You’ll need to remove any parts that are blocking access to the thermostat housing, such as the air intake duct or other engine components. Be sure to consult your car’s owner manual or a repair manual for the specific location of your car’s thermostat and any special instructions.

Step 3: Drain the Coolant

Before you can remove the thermostat, you’ll need to drain the coolant. Locate the radiator drain plug or petcock and place the drain pan beneath it. Open the plug or petcock and let the coolant drain out. Be sure to dispose of the old coolant properly according to local regulations.

Step 4: Remove the Old Thermostat

Once the coolant has drained out, you can remove the old thermostat. The thermostat housing will be held in place by a few bolts or clips. Use your screwdriver to remove these fasteners and then gently pry the housing off the engine. You may need to use a pair of pliers to remove any stubborn bolts or clips.


With the housing removed, you should be able to see the old thermostat sitting inside. Gently remove it from the housing, being careful not to damage the gasket or any other components.

Step 5: Install the New Thermostat

Before installing the new thermostat, be sure to clean the housing and remove any debris or old gasket material. Place the new gasket onto the housing if it’s required, then place the new thermostat into the housing.

Make sure that the new thermostat is oriented correctly – the side with the spring should be facing the engine. Reinstall the thermostat housing onto the engine, making sure that it’s properly aligned and all bolts or clips are tightened securely.

Step 6: Refill the Coolant

With the new thermostat installed, you can refill the cooling system with fresh coolant. Refer to your car’s owner manual for the correct coolant type and the recommended coolant-to-water ratio. You may also need to “burp” the cooling system to remove any air pockets – consult your repair manual for specific instructions on how to do this.

Step 7: Check for Leaks and Proper Operation

Start the engine and let it run for a few minutes to ensure that the thermostat is functioning correctly. Check for any leaks or other signs of trouble. You should also check that the temperature gauge is operating within the normal range.


And that wraps things up! Changing out the thermostat in a car is a job that can be accomplished with only a few fundamental tools due to its relative ease. However, if you are not confident in your ability to do this repair on your own, it is highly recommended that you take your vehicle to a qualified mechanic.

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