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Pulley on LS1 vs. Pulley on LT1

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Old 08-20-2005, 02:18 AM
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Default Pulley on LS1 vs. Pulley on LT1
Long story short:

A couple years ago the timing chain broke on my LT1 w/ 80K miles on the car. It broke 2K miles or so after I put on a $50 underdrive pulley. The shop that went over my car blamed it on the underdrive pulley because it was not balanced???

Now, from what I've understood the LS1's are internally balanced and the LT1s are not.??

Are there any similar risks of putting an underdrive pulley on an LS1 car?
Last edited by SS01RED; 08-20-2005 at 02:18 AM. Reason: spacing
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Old 08-20-2005, 08:47 AM
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i personally thought LT's were internally balanced and i dont see how the chain breaking could be blamed on an underdrive pulley unless there was something seriously wrong with the pulley.
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Old 08-20-2005, 12:54 PM
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The pulley was fine...?
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Old 08-21-2005, 08:00 PM
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any ideas?
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Old 08-21-2005, 08:03 PM
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LS1s are internally balanced.....the balancer is just to dampen harmonics......


on any engine, 99.9999999999% of the time, if the chain brakes it was a bad chain......
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Old 08-21-2005, 11:29 PM
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Did you mount the Balancer on the end of the Underdrive pulley or did you just replace the Balancer with the Underdrive Pulley?
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Old 08-21-2005, 11:58 PM
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Question are balancers from LS1/LS6 01-04 Vettes the same as Fbody LS1 98-02 ??
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Old 08-22-2005, 01:01 AM
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I plan on picking up a pullley, hope they aren't bad!
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Old 08-22-2005, 01:37 AM
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I just installed an ASP UD pulley and I'm happy with it.
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Old 08-22-2005, 11:00 AM
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No the Vette pulley is different from the F-body pulleys the belts are closer to the motor.

Nate
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Old 08-22-2005, 11:01 AM
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Alright thanks. Ill post my Vette balancer and oil pan maybe someone needs them.
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Old 08-22-2005, 12:44 PM
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Originally Posted by smoknta
Did you mount the Balancer on the end of the Underdrive pulley or did you just replace the Balancer with the Underdrive Pulley?
I just replaced it...pulley for pulley.
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Old 08-22-2005, 08:17 PM
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thats what the instructions said to do...
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