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Why could my 1997 Oldsmobile silhouette run hot after replacing water pump and thermostat on vehicle?
Wiki User
∙ 16y ago
If it wasn't running hot before the changes you may have an airlock in the water system. If it was running hot before it might still be an airlock or it could be the head gasket leaking. Whichever it is it needs sorting quickly. The best placed to cure this problem are your local garage or dealership. But you could try this first: With the engine cold and all the heater controls set to hot, remove the top from the expansion bottle. Make sure there's the required level of fluid in it then squeeze the thick radiator hoses to try and move the air out of the system. Run the engine and check for more air. Replace the expansion botle cap. Note: Sludge in the water, continuous air bubbles, antifreeze colour change or oil in the water all indicate headgasket leaks
Wiki User
∙ 16y ago
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