Test the water pump
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.
Do the flush-make sure the radiator is not clogged-up and bleed the system. If it continues have it block and pressure tested.
Monday, January 12th, 2009 AT 4:51 PM