Question about 2000 Oldsmobile Silhouette

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My olds is constantly overheating even though i changed the thermostat do i have to now change the head gasket?

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Things to check
1 coolant level is FULL
2 is the temp. gauge jerky when it moves if so you have air in the cooling system
3 check make sure the COOLING FANS ARE WORKING
4 remove the PCV VALVE front valve cover and see if there is a WHITE ISH COLORED GOO ON IT if so the INTAKE MANIFOLD GASKET IS THE LIKELY CAUSE
5 if all that is good then jack up the vehicle and slide under and look at the BACK CYLINDER HEAD SEE IF THERE IS COOLANT LEAKING OR COOLANT STAINS if so then the HEAD GASKET IS THE CAUSE
hope this was help full
good luck

Posted on Dec 13, 2009

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