Could be a clogged-up radiator and water pump defective-
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.
Radiator feel for cold spots
Cooling fans or fan clutch are they operating properly
Continues to overheat get it block and pressure tested
Wednesday, January 13th, 2010 AT 5:08 AM