I replaced my thermostat, my water pump, my ,and my engine still overheats. on 2005 Chevrolet Malibu

is it possible I might have a blockage in my heater core,cause there's no heat blowing from the fan.

by in Springfield Gardens, NY on August 22, 2013
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3 answers 3 comments
ANSWER by , August 22, 2013
Overheating and no hot air from heater are both tell tale signs of LOW COOLANT.
COMMENT by , August 22, 2013
it has plenty of coolant, what else might be the problem.. I really don't know, its got the right thermostat, and the dex tro coolant.
COMMENT by , August 22, 2013
IF, IF it is FULL of coolant and radiator fan(s) are working, it is possible a head gasket may be defective! Repair shop can do a combustion leak test to confirm or refute.
COMMENT by , August 22, 2013
also could be faulty water pump,Have seen a few cases where the impeller comes disconnected from the shaft..if compression is ok as pushrod stated need to confirm that the pump is circulating the coolant propperly
ANSWER by , August 22, 2013
Feel the the inlet and outlet pipes to the heater core. If the inlet is a lot warmer than the outlet, the heater core could be plugged. (Careful not to burn yourself!)
ANSWER by , August 23, 2013
POSS BLOCKAGE IN RADIATOR OR COOLING FANS ARE NOT WORKING PROPERLY