Why would a Pontiac Grand Am GT with a new thermstat have cold air coming out of the defogger and the heater core getting hot?
How do you know the heater core is hot? check the radiator surge tank. I bet its empty. next look down by the thermostat and see if your intake gaskets are leaking coolant. now you are where im at. I just bought a new set of gaskets for my 2002 and am online surching for torque order and values.
97 cadillac caterabattery is getting drainedthe open wire or short is coming from the last green 80 amp maxi fuse under the hood does anyone know what that fuse is foror does anyone know of this car h?
If it is white smoke and it is coming out of the exhaust then it is possibly a blown head gasket, the white smoke is from water getting into the engine. some times you can check by taking the radiator cap offand turning the engine over, if water shoots out then its a blown head gasket. at least that's what my Nissan did.
If the engine is cold... it could mean that the radiator cap is too weak to hold and you need to get a new one. If the engine is HOT... it could mean that you have overheated it and you need to add water after the engine has cooled a bit, to prevent getting burned, be careful and use a towel to remove the cap to add coolant.