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Old 05-06-2021   #1
TX '90 ZR1
 
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Join Date: Oct 2017
Location: TX
Posts: 2,073
Default Water pump rattle ?

Hey Guys & Gals,
I am going to follow my own advice and ask before jumping in with both feet.
Car is a '90, 39k on the miles.
Have noticed a "rattle" sound at the front of the engine. Have verified it is coming from something belt driven. Have had my stethoscope all over it and can't tie it down for sure. Removed belt and the only thing I can find suspect is the water pump. The water pump shaft has a little (just enough to feel it move and a bit of noise when applying side pressure on the pulley) play so I am thinking it is on it's way out. It is not leaking any coolant though. All other driven items seem to be smooth and tight.
Anxious to get feedback with everyone's thoughts.
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Kenny
1990 #442
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