Question about Chevrolet Cars & Trucks
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Posted on Jan 02, 2017
the thermostat is located in the housing attached to the intake on the reare of the engine just follow the upper radiator hose to the housing. please rate this
Posted on Oct 01, 2008
After replacing the thermostat, you must bleed the air from the cooling system.
To bleed air from the 2.2L and 2.5L engines, remove the plug or sensor on the top of the thermostat housing. Fill the radiator with coolant until the coolant comes out the hole. Since the plug is made out of steel and the thermostat housing is aluminum, it is a good idea to apply an anti-seizing compound or Teflon® tape on the plug threads prior to installation. Install the plug and continue to fill the radiator. This will vent all trapped air from the engine.
Any trapped air in the heating system will have to be displaced by coolant. Once the cooling system is filled, with the radiator cap off, turn of the heater at it's highest setting. Start the engine and allow it to reach operating temp. You should see a drop in the coolant level as the air in the heating system is displaced by coolant. Add coolant to the proper level and replace the radiator cap.
Keep a close eye on the coolant level for at least the next couple of weeks. The cooling system is a "closed" system. Any significant decrease in coolant level indicates a problem.
If you have any questions, let me know.
Please take the time to rate this solution.
Drive safe and be warm.
Posted on Feb 02, 2009
I have a 2003 Honda Civic EX as well (158k miles). At first it would overheat when idling, and then my heater started working sporadically. It would blow cold air when idling, then hot air when driving. It would also cause my car to overheat. I would turn the temp to cold and the car temp would reduce. My coolant level would also drop to next to nothing every few months, but I never saw any pooling, or leaking from the radiator. I changed the water pump, thermostat, all the belts since I was there anyway, the water sensor and the radiator cap. After all this it was asymptomatic for 4 days, then the problems persisted. I took it to the mechanic and it was diagnosed with a blown head gasket. The test for it is fairly simple and runs ~$45 (1/2hr labor charge). I would try that before changing out more parts when you don’t need to.
Posted on May 13, 2010
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