Question about 2006 Chevrolet Impala

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Engine light comes on and says engine overheating

I have a 2006 chevy impala and at first engine light came would check system and clear and the next day engine light came back on. then it would say engine hot a/c off and then engine overheated idle engine two seconds later it would say engine overheated stop engine. radiator and hoses all smoked and no leaks, also all fluid levels checked and full, oil changed, car overheating esp when a/c is used.thermostat level shows car is overheatng.fans are working and belts all have approriate tension. could it have to do with a/c sensors or a/c compressor or thermostat or water pump. sometimes car doesnt register when switching from a/c to heat and will continue to run the a/c.

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Could be three things: Hopefully the first...
1. radiator fan not blowing. (most likely)
2. Radiator clogged (not likely)
3. Head gasket blown... (very possible)

If #1, system cannot detect fan not blowing. It may be the fuse or the relay switch, disconnecetd wire at fan, or burned-out fan motor.
If #2, Flush radiator
If #3, you will see WHITE smoke out the tailpipe and excessive water drops.
Your new oil will have a "milky" look (check the oil dipstick). That is water.
When engine is COLD, remove radiator cap and start car. You will notice high-pressure "bubbles" squirt out of the radiator, even before the engine warms up.

I hope it is #1. and that this is helpful.



Posted on Sep 08, 2009

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