Strange cooling system problem - Saab 900 Bulletin Board - Saabnet.com
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Strange cooling system problem
Posted by Bill S. [Email] (more from Bill S.) on Tue, 25 Dec 2007 20:54:22
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Trying to figure out a strange cooling sys problem on a '91 900S. While driving in town or on the highway, everything's fine: temp gauge shows normal (maybe even a little low) and the heater in the car blows warm air as normal. At idle though, the temp gauge starts to creep up toward hot (well above half), but the weird thing is the air from the heater goes ice cold. The cooling fans are running and the radiator top hose (from the thermostat) is hot to the touch. Water is present in the expansion tank.
The only thing I can think of is the water pump is not circulating the coolant well when the engine's turning over relatively slowly at idle, but this seems like a stretch. Anyone have any other ideas?
posted by 67.160.87...
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