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Classic 900 - Odd Temperature Gauge Behavior
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Posted by ForzaSaab [Email] (#1646) [Profile/Gallery] (more from ForzaSaab) on Mon, 5 Jan 2026 08:04:51 Share Post by Email
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SaabNet : I have a 1984 Saab 900 3 Door Hatchback - the single cam base model.

The temperature gauge, in the instrument panel is not behaving. Here is what happens, when the car is started from a cold condition.

A - The temperature gauge reads a bit low for about the first 10 to 15 minutes. Less than the normal horizontal needle position.
B - Then, somewhat randomly, the gauge instantly pegs to maximum.
C - There are no coolant leaks, and the coolant level is normal.
D - The temperature sensor in the engine block has been replaced.
E - The thermostat and water pump have been replaced, and the coolant has been flushed.
F - There is no coolant in the engine oil.

Thanks very much for your help solving this one. 

_______________________________________
Forza
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