Water pump pulley keeps breaking. Upgrade options?
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Joined: May 2017
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Water pump pulley keeps breaking. Upgrade options?
Hi guys,
My 2001 Z06 is my lapping car. I've been lapping with it for about 10 years. Motor is stock aside from headers, tune, intake.
Over the winter I did a huge refresh on the car; changed all pumps, pulleys, belts, water pump and pulley, etc
About 1 month after I took it out of storage, the water pump pulley completely sheared off....weird. I thought maybe I had purchased a defective part, so I bought an AC Delco replacement, new belts, and everything worked great.
Now about 1 month after that change, it sheared again at the same exact spot.
There is no wobble on the crank shaft pulley.
I'm afraid to go out and buy another for fear that the same thing will happen again. I would like to replace the water pump and pulley assembly with a stronger unit seeing as the stock one is clearly not working... I did some searching on the forums and it seems like a common issue with guys that are supercharged. But that doesn't make much sense either as the SC pulley doesn't even touch the water pump.
HELP PLEASE!
My 2001 Z06 is my lapping car. I've been lapping with it for about 10 years. Motor is stock aside from headers, tune, intake.
Over the winter I did a huge refresh on the car; changed all pumps, pulleys, belts, water pump and pulley, etc
About 1 month after I took it out of storage, the water pump pulley completely sheared off....weird. I thought maybe I had purchased a defective part, so I bought an AC Delco replacement, new belts, and everything worked great.
Now about 1 month after that change, it sheared again at the same exact spot.
There is no wobble on the crank shaft pulley.
I'm afraid to go out and buy another for fear that the same thing will happen again. I would like to replace the water pump and pulley assembly with a stronger unit seeing as the stock one is clearly not working... I did some searching on the forums and it seems like a common issue with guys that are supercharged. But that doesn't make much sense either as the SC pulley doesn't even touch the water pump.
HELP PLEASE!
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2020 Corvette of the Year Finalist (performance mods)
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did you get the ac delco oem replacement?... they have 2 different pumps and the cheaper one I have seen have issues like you are describing as well as other cheaper non-oem brands... another possible option is to tack weld the pulley to the shaft
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Thread Starter
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Joined: May 2017
Posts: 83
Likes: 11
I'll let you guys know if it breaks again lol
Thread Starter
Advanced
Joined: May 2017
Posts: 83
Likes: 11
Acct Suspended APR 2026 by request
Joined: Dec 2010
Posts: 10,367
Likes: 1,272
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
you need a calibrated laser alignment tool and basically you use the balancer as a reference point and use the tool to shoot from the balancer to the other pulleys and make sure that the ribs are in alignment... check the stickies in the forced induction section, there is a good thread on this subject
Last edited by StingrayRebel; Aug 6, 2019 at 05:18 PM.