I have an 87 Grand Am with the 4 cylinder engine and well over 200k miles. It severely overheats when idling, but the water pump is not seized, the fan motor seems to be working and it's not losing enough coolant to be a head gasket, etc. My guess is a stuck thermostat, so I want to try changing it and the radiator cap (just to be safe) before totally giving up on the car, which is just used as a spare for our 2 much newer vehicles and isn't worth putting very much money into. If it's anything very serious I'm just going to get rid of the car. Maybe I'm just blind, but I can't seem to locate the thermostat housing on the engine. If anyone knows exactly where it is I would really appreciate the help.
Where is the thermostat housing on a 1987 Pontiac Grand Am 4 cylinder?
If you have the 2.2, the thermostat is located on the front of the engine right behind the water pump.
If you have the 2.3 or 2.4, the thermostat is located on the back of the engine. There is a tube that runs under the oil pan and goes up under the water pump and the thermostat is located where that tube hooks into the water pump.
Where is the thermostat housing on a 1987 Pontiac Grand Am 4 cylinder?
follow the big hose coming from the top of the raidaitor to the other end.
Follow the upper rad hose to where it meets the engine, that should be the housing for thermostat.
