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Old 05-02-2013, 01:11 PM   #1
Chevyllac
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Water pump question

Morning fellas, I have a question about my water pump. What is a for sure way to tell if the water pump is on it's way out?? The truck does not over heat or leak but it does make a hissing noise up front how do I tell if it needs to be replaced?? or is it the belt that needs to be replaced?? thanks for any info
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Old 05-02-2013, 01:33 PM   #2
Shyguy
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Re: Water pump question

Might be the belt, put some belt dressing on the belt and see if the hissing goes away.
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Old 05-02-2013, 01:45 PM   #3
domeier
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Re: Water pump question

Get one of these: Nothing works better at isolating where weird noises are coming from. Never heard a water pump make a hissing noise. Are you sure it's not a vacuum leak, or maybe your radiator cap?
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Old 05-02-2013, 02:07 PM   #4
BB72CHEVKT
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Re: Water pump question

I would look for something that is sucking air. The hose to my PVC came loose and it made a horrible hissing noise.
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