I would check everything EdCarCal said. Also check if the coolant is going in the heater core and returning. Make sure the coolant level is full. If you have leak and the level gets too low the heater will not blow warm air.
You should feel a temperature gradient across the radiator (hot at bottom, cooler at top) if the cooling fluid is circulating properly. If not, you are not getting proper circulation. All things being equal, check the thermostat again - if it was installed incorrectly or is faulty (not unusual), it is not opening and will cause this. Otherwise, you have a blockage somewhere in the system (such as a collapsed hose or blocked port at the pump).
SOURCE: radiator overheating
hey im having a problem with my 96 cirrus overheating. i think its the fans. they dont seem to turn on unless i let the hood drop, then they suddenly kick on. the fuse is good.. any ideas??
SOURCE: overheAting
I had that problem before, the intake manifold gasket leaks. After replacing it runs like a charm. I have an '01 also and still have it.
SOURCE: Olds silhouette heater blows cold air
as long as the engine temperature is normal, i would suspect a clogged heater core, the dex-cool antifreeze is notorious for building up deposits in cooling system. have heater core flushed first to see if it makes any difference
SOURCE: engine overheating-----1994 Olds Cutlass Supreme 3.4 liter v/6
There seems to be an air pocket or no antifreeze in engine block. Try this method disconnect upper radiator hose and pour water directly into hose down into engine block until it full. when its filled reconnect hose and fill up radiator. as the vehicle warms up open bleeder valve on the thermostat housing and release air from system. open slowly and BE VERY CAREFUL WATER WILL BE HOT, bleed until you get a steady stream opening and cosing valve. However if all of this don't work. You may have a bad pump. Good Luck
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