1999 Oldsmobile Silhouette Thermostat or water pump

1999 OLDSMOBILE SILHOUETTE
17,000 MILES • 6 CYL • FWD • AUTOMATIC
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CAMARO6079
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  • 1 POST
The water temp. gauge will suddenly and quickly move to the hot side and then after a few seconds it will quickly move back to the cool side and stay for a while and then repeat. I believe it is the thermostat, it is not loosing coolent or overheating, in fact it takes quite awhile to get heat from the heater
Mar 2, 2009 at 7:26 AM
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2CARPRO JACK
  • ✓ASE Certified Mechanic
  • 11,533 POSTS
  • ASE Certified Mechanic
Usually sudden spikes are a sticky thermostat.I would start there.If the level is full then that would be the place to begin, water pumps dont work then stop working
Mar 2, 2009 at 7:31 AM
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