Replaced water pump but did not help. What else could it be?
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1996 Oldsmobile Cutlass Supreme Question: Car is overheating and heater blows cool air.
Answer #1Greg's Orange Auto (14643 Answers) , Orange, CA - (714) 361-9386globalhelper February 04, 2013, 15:35Master
POSS STUCK CLOSED THERMOSTAT OR PLUGGED RADIATOR
Answer #2torque wrench from Stewart's Auto Repair LLC, February 04, 2013, 16:50Master
Did you bleed the air from the cooling system? There are bleeder valves that need to be opened to expel air from the cooling system after you service it. If you didn't you probably got a air lock in the top of the engine radiator and overflow tank will appear full, but you will have anything flowng through the cooling system. Other possible problems are thermostat, radiator or heater core blockage.