Timing Chain Sprockets - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 01-02-2019, 09:27 PM Thread Starter
 
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Timing Chain Sprockets

Does anybody know for certain when the transition was made from the Fiber Cam Sprocket, to the steel one? - Year & Cubic Inch....Thanks
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post #2 of 3 (permalink) Old 01-17-2019, 12:53 PM
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I don't think that transition was ever made....I think nylon was used until the end of production in 1981. Most were changed out to steel at about 60k miles.
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post #3 of 3 (permalink) Old 01-17-2019, 02:24 PM
 
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This was discussed on the PY forum, not too long ago. They were used into the very early '70's. Most agreed that they were last used in Pontiac engines during the '71 model year.

http://forums.maxperformanceinc.com/...d.php?t=824966

Last edited by bigD; 01-17-2019 at 02:35 PM.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion

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