Question about 2000 Pontiac Grand Am GT

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Engine overheating i changed water pump and thermostat. not sure how to bleed air from system

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The best way to flush it would be to take off the bottom radiator hose and pump water through the fill nozzle after all the coolent is out you can then hook the hose back up and replace it with new coolant.

Posted on Feb 01, 2009

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Cool the radiator down by running cool water over it, while the engine is running. Slowly remove the radiator cap to the first notch to bleed off any pressure, while keeping cool water flowing over the radiator.

Once pressure has bleed off, remove cap, add coolant as needed.

Replace cap. Check overflow level in overflow tank.

If you got the engine hot AFTER replacing the thermostat, go get another thermostat and replace again. Once a stat get's overheated, they don't like to work right again.

Then, make sure the radiator is clean and clear of sludge. If you have sludge, your going to chasing this for awhile.

Posted on Feb 01, 2009

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Mazda 626 is overheating. changed the thermostat twice in 10 weeks Both fans are working;increase temp when Accelerating.tried to bleed air from the system but this model doesn't have a bleed valve.


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We replaced the water pump, thermostat yesterday , still have a overheating problem. Acts like an air lock in the system. bled everthing and still overheating.


If you get a constant peculation of air bubbles out the radiator while your bleeding the system than you are likely another victim of the well know head gasket failures that occur on these engines (3.4 liter). All it takes is one overheating and they are done.

I would assume that you are sure the thermostat is working?

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