my car overheats while driving but not while idling. temp goes back to normal when not moving with engine on. What is problem
Jan 31, 2009 at 3:02 AM
2001 Buick Lesabre overheating
2001 BUICK LESABRE
CJAMIS1
- MEMBER
- 1 POST
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RASMATAZ
- ✓ASE Certified Mechanic
- 75,992 POSTS
Test the water pump and thermostat then report back.
One way to test for a bad water pump is to squeeze the upper radiator hose when the engine is hot and idling. Careful, because the hose will be HOT! If you do not feel much coolant circulating through the hose when you rev the engine, the pump may be bad. The other cause might be a bad thermostat that is not opening properly (remove and inspect the thermostat), or a clogged radiator.
One way to test for a bad water pump is to squeeze the upper radiator hose when the engine is hot and idling. Careful, because the hose will be HOT! If you do not feel much coolant circulating through the hose when you rev the engine, the pump may be bad. The other cause might be a bad thermostat that is not opening properly (remove and inspect the thermostat), or a clogged radiator.
Jan 31, 2009 at 4:47 AM
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