Question about 1999 Oldsmobile Silhouette

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Overheating and it is not the thermostat - 1999 Oldsmobile Silhouette

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  • dale blankenship Sep 06, 2010

    When does it overheat? Highway driving, or idle/stop-n-go traffic?
    Do you know if the cooling fan is working?
    Have you checked for something (plastic bag, paper) stuck to front of radiator?

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The only other thng it would be is your water pump

Posted on Sep 06, 2010

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Overheating can be casued by a few things.

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3)Dirty coolant clogging the pump

A thermostat is the cheapest part to replace, a thermostat opens and closes allowing coolant into the motor as needed to keep it cool, if it gets stuck closed then it doesn't allow any coolant into the motor thus overheating.

A water pump is what pumps your coolant around the system, and if this goes no coolant moves thus overheating. Usually when these go bad they leak coolant and are also noisy when bad.

Lastly could be bad or dirty coolant, a coolant flush can take care of this.

If I were you I would start with the thermostat followed by the coolant flush, both of these can be done in your driveway.

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