overheating problem...water pump?
#1
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overheating problem...water pump?
Ok so after driving my car for about 10 minutes the temp gauge starts rising quickly. It only does this when I come to a stop. If I put my foot on the gas just slightly and the temp guage starts going back down. So if I'm stopped I just have to gas the car a bit until I start moving again and that will keep the temp down. I have changed the coolant. I was was thinking maybe it was the water pump?
#2
Apathy Kills
The water pump is driven by the same belt that drives the camshafts; failure of the pump would be much more dramatic.
My money is on the thermostat. When you replaced the coolant, did you test the thermostat to ensure it opens at about 150°F?
My money is on the thermostat. When you replaced the coolant, did you test the thermostat to ensure it opens at about 150°F?
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#3
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If it's directly related to the camshaft wouldn't it make more sense that it is the water pump? As long as I am revving the engine it doesn't overheat...
#4
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With the thermostat closed, the flow to the radiator is restricted and the coolant temperature will be more susceptible to fluctuations based on flow rate.
If you take that car out on a lengthy highway run, you will discover that the coolant temperature will continue to rise as both the coolant and engine block reach their limit of heat absorption. Once you pass that limit, you risk blowing the head gasket, warping the cylinder head or worse.
If you're due for a timing belt change (which should happen every 90,000 or 6 years), by all means replace the water pump while you're down there.
It's a good insurance policy.
But if the thermostat isn't opening, the symptoms you describe are going to continue. The same thing happened to my GTi after I changed to an electric water pump and the thermostat was the culprit.
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