To replace a car thermostat, unbolt the gooseneck housing around the thermostat near the top of the engine, unbolt and remove the old thermostat and gasket, bolt in the new thermostat and gasket and reconnect the gooseneck housing. If the gasket is not a self-sealing gasket, sealant must be applied before reconnecting the gooseneck housing, according to the Family Handyman website.Continue Reading
If a car's engine is repeatedly overheating without the dashboard indicating that the engine is too hot, it means the thermostat in the engine needs to be replaced. Use the following steps to replace a vehicle's thermostat.
If possible, purchase a self-sealing gasket.
Most thermostats are located at the top of the engine in a gooseneck housing.
Carefully remove the bolts holding the housing and gasket without dropping any bolts down into the vehicle. If necessary, clean the thermostat housing.
After removing the old thermostat, bolt in the new thermostat and gasket exactly how the old one was positioned.
Finish by bolting the gooseneck housing back on over the thermostat and gasket.