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#1
02-27-2023, 11:00 PM
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Crank to flexplate shim
I have always wondered why Pontiac always have a shim between the crank and flexplate (at least from what I have found). Does anyone know? I have always reinstalled it but am wondering if it's necessary.
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#2
02-28-2023, 08:09 AM
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Not necessary.
There was a service bulletin (can't remember the year?) where they dropped it. 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#3
02-28-2023, 09:22 AM
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I too always clean and reuse, but not knowing its purpose or function. Only idea was metal hardness/fritting isolator/mitigator. Via clamping friction.
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#4
02-28-2023, 10:12 AM
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I'm curious why Pontiac felt it was nescessarry to use the shim for so many years. I actually thought it was eliminated with the smaller flywheel register. The part was designed for a "reason". I believe they switched to using that shim at the same time they eliminated the bolt flange support spacer.... Which was designed for a reason also.
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