How to Replace a Chevrolet Impala Thermostat

by Carl Pruit

Designed to open when the coolant reaches 195 degrees fahrenheit, the Chevrolet Impala thermostat is a corrosion resistant design with a unique V-notch that measures the amount of coolant needed at any one time, allowing just enough to control the temperature of the Impalas engine. This improved design is made of stainless steel and built to withstand heavy usage. Replacing the Impala's thermostat on a regular basis will give you better fuel economy and reduce wear on your engine.

How to Replace a Chevrolet Impala Thermostat

Remove the cap from the top of the radiator and locate the thermostat housing at the end of the radiator hose near the engine block. Place a drain pan underneath the radiators drain plug and loosen the plug with an open end wrench to allow the coolant to drain until it is below the level of the thermostat housing, then close the drain plug with the wrench.

Detach the thermostat housing next to the engine block by undoing the bolts with a socket wrench. Disconnect the thermostat from the inside of the housing and put the old thermostat aside.

Clean the surface of the thermostat housing and the face of the engine block where the housing attaches with an emery cloth to remove any remaining gasket material. Spread a layer of gasket seal on the face of the thermostat housing and place the new thermostat on top of the housing with the spring facing outward.

Reattach the thermostat housing to the engine block with the bolts and refill the radiator with coolant. Once the radiator is full, place the cap back on the radiator and remove the drain pan from underneath the radiator.

Turn the engine on and allow to run for about 5 minutes to verify that the thermostat is working properly. When you are satisfied turn the motor off. Dispose of the drained coolant by taking it to your local recycling center or automotive supply.

Warning

  • close Allow the engine to cool down before attempting to do any repairs on the motor.

Items you will need

About the Author

Carl Pruit has been a freelance writer since 2005, specializing in service journalism and travel. His work has appeared on various websites. Born and raised in California, Pruit attended Contra Costa Community College in San Pablo, Calif. and received an associate degree in the administration of justice.