I got a GrandAM that gets hot but will cool down after you rev up the engine while in nutral, heater doesnt work had head gasket work done on it, new water pump,thermostat, raiditor flushed, thought it had air lock had fluids pumped thoughout the engine at chevy dealer and still over heats and doesnt blow any heat the blower does work but its just varly warm.
Sounds like the heater and much of the engine is full of air.
Replace the heater core. Friend had the same exact problem on his 94 grand Am. He ignored it. Heater core finally started leaking. We replaced the heater core & the overheating went away.
with engine warmed up if both hoses are hot in and out of heater core on firewall then heatercore is flowing ok.if one is cold then heatercore is blocked/dirty.you can reverse flush with gardenhose and retry.make sure your radiator fan is coming on when engine gets hot.
"with engine warmed up if both hoses are hot in and out of heater core on firewall then heatercore is flowing ok"
Usually that theory is true, but for some f'd up reason it does not hold true in this particular car 94 GA
Mine is a 95 Pontiac Grand Am and leaks coolant, fogs up windshield, and cannot use heater. Is this my heater core also?
You got it
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