Question about 1990 Buick LeSabre
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Posted on Nov 08, 2008
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Posted on Jan 02, 2017
SOURCE: Serpentine Belt Tensioner
take belt off then make sure you have the right size socket and breaker bar to loosen the bolts on the tensioner and do everything in reverse to put new on
Posted on Jan 01, 2009
Most likely the thermostat sticking...
The thermostat could also be missing!
That would create some of the symptom you describe.
Not too hard to replace. It is at the end of the large radiator hose where it connects to the engine.
1. Drain radiator
2. Undo the two bolts that hold down the thermostat housing
3. remove thermostat and remove all old gasket and gasket sealant residue on the engine and housing
4. replace thermostat in the correct orientation (pointy side UP) with the new gasket and sealant
5. Tighten down housing and re-fill the radiator.
It could also be a clogged heater core. It may only be circulating enough heated water to work sometimes and the water is returning to the radiator via the "bypass" hone.
Hope this helps!
Posted on Sep 11, 2009
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