Question about 1992 Cadillac DeVille
Posted by Anonymous on
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Posted on Jan 02, 2017
Either you are low on coolant or you still have an air pocket in the system after you replaced the thermostat.
With the engine cold remove the radiator cap. Top off the radiator if low. Start the engine and allow to warm up at idle, topping of the coolant as necessary. Once the thermostat has opened, the upper hose will get hot. Snap the throttle a couple of time. This will help force coolant into the heater core and push out the air. Once the cooling fans come on replace the radiator cap.
Raise the engine RPM'S to about 2,500 and hold it until there is sufficient heat out of the vents. Let the engine idle, Id there constant heat? If not snap the throttle a couple more times and then raise the RPM's up again.
Posted on Dec 14, 2010
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