Head gasket is damaged, it needs to be replaced. The car was hesitating to start, and the engine light was on; it did not overheat though. Why does the thermostat need to be replaced if the car never overheated? could a coolant leak damage the thermostat?
I have a 2005 1.8 nissan sentra.i rplaced the radiator becuause it was leaking.so when i did i took it for a test drive and the needle went to hot then back down to middle ways between the C & H BACK IN FORTH.so i replaced the thermostat. now as far as i can tell it is staying in the middle of C & H. i can't feel no water though cerulating through the top or bottom hose of the radiator. so now that i told you what i done so far my question is???? ( my heater is not working in the car it is blowing out cold air & i left the car runnng for about 45 min. even took it up and down the road.still cold air.what do you think i need to do?????????? )
When engine over heats could and usually warps or damages spring in stat
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