How to Replace a Toyota Celica Thermostat

by Leonardo R. Grabkowski

Later models of the Toyota Celica had a 1.8L four-cylinder engine. While this engine isn't that different from other Toyota four-cylinders, it does require extra work when replacing the thermostat. The Toyota Celica's oil filter must be removed prior to accessing the thermostat. If your cooling system isn't properly cooling your engine, you may have a sticking or faulty thermostat, which will require replacement. You can do it at home, provided you are fairly experienced in auto repair and have the necessary tools.

Step 1

Shut the engine off and let it cool down for 30 to 45 minutes. Engine components and coolant get extremely hot (around 200 degrees F) and can cause severe burns.

Step 2

Unhook the negative battery cable and position it out of the way, so it doesn't make contact with the post.

Step 3

Remove the plastic engine shroud from underneath the Celica. Position the drain pan underneath the radiator drain plug. Remove the drain plug and allow the coolant to completely drain out.

Step 4

Unhook the engine temperature switch from the water inlet housing near the thermostat. Remove the oil filter to access the thermostat. Use a proper oil filter wrench.

Step 5

Loosen the clamp on the lower radiator hose and pull the hose away from the water inlet housing. The hose will likely have a small amount of coolant in it; let it drain into the container.

Step 6

Remove the two bolts from the thermostat housing. Pull the housing away and set it aside. Pay attention to the position of the thermostat valve. The new thermostat needs to be in the same position (facing the bolt stud).