Questions & Answers for: Pontiac Sunfire when a thermostat is bad

...thermostat is malfunctioning,although it could be a bad temperature sensor too.If the vehicle has alot of miles,and the thermostat is old,go ahead and replace it as it isn't very expensive,and a new ...

...out of.. was told to put straight water in it to prevent blowing my engine. i have a replacement thermostat but noone knows where it is located. Follow top radiator hose to engine and thats where ...

...thermostat..i assume you have a 2.2 liter engine...it is on the side of the cylinder head on drivers side of engine...its buried in there a little bit, but not that bad to service..the upper hose ...

...bad thermostat and last, blown head gasket. Proper testing for any and all these conditions will give you the answer you are looking for. If the antifreeze is overflowing without any overheat, it can ...

...thermostat. The last thing to check would be the water pump. It may not be circulating the coolant but usually you will hear it making noises or leaking out the bottom if it is bad. Hope this helps. ...

...bad thermostat 2) bad radiator cap ( not holding pressure so it will leak coolant) 3) blown head gasket . 4) bad heater core (leaking coolant out.. check the floor board under the dash on the ...

...thermostat – hoses are -Checked for no collapsed hoses – all OK -Fan is running Whay does the car continue to overheat with the thermastat in? What are you going by to say it's overheating , temp ...

overheating;check engine light stays on Plugged Radiator Bad Thermostat Bad Water Pump What does the Check Engine Light Say?

...thermostat bad I just put a thermostat in my '01 sunfire and its bad alreadh What do you mean by your thermostat is bad? Does it refuse to open causing your vehicle to overheat? Is it sticking open ...

...off the engine temp drops and no heat only blowing cold air ? rechecked hoses from heater core to radiator both heat up like they should, can't figure this out. Replace the bad thermostat you