Need to replace the themostat - 1991 Toyota MR2

It's inside the timing cover. Change the housing (with sensor) when you change thermostat.

check your coolant level first, if it's within the marks then you need the thermostat replaced.

need new themostat. first check to see if you have enough coolant in resivior and start from there. second check for obvious leaks in hoses. lastly if no leaks then its your themostat. is this s 6 cylinder or 4 cylinder?

thermostat should be where the top radiator hose meets the engine inside the thermostat housing!

Drain the radiator, follow the top radiator hose to the engine, it is connected to the thermostat housing. Loosen and remove the two bolts, lift the housing and remove thermostat, make sure the new thermostat goes back in the exact same way, tighten bolts, make sure pepcock is closed on radiator, refill radiator, start engine, run heater on full blast, add coolant as needed.

yes you are correct, it is located at lower hose ,in housing were hose connects to motor. hope this helped.

first of all check the radiator for leak or blockage. make sure the coolant is fresh. follow th eupper radiator hosr to the emgine block. there should be 3 bolts attached the themostat housing. take the themostat out and put it with hot water, maks sure the opens. the temperture sending unit should be directly under the themostat. msot likely the themostat is cause or the problem. unless the temperture gage is not reading correctly.

Make sure you have fluid in the radiador.when it low it will not heat the in side of the car. Replace the themostat .

BAD HEAD GASKET.....

try removing themostat and see if temp improves make sure themostat is fitted the wright way not upside down