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Originally Posted by JFP in PA
Probably the dumbest was an early (Wayne Dempsey days) Pelican procedure that did not use ANY cam holding tools, but instead used Allan head set screws threaded into the back of the engine case thru the IMS flange bolt holes to try and hold the chains by putting pressure on the gear on the rear of the IMS shaft in a vain attempt to lock the chains. Unfortunately, that rear gear is pressed on and slip prone, resulting in that gear being pushed forward on the IMS shaft, and the shaft suddenly jumping upwards and to the right due to the tension on the chains. When this happened, cam timing was lost and there was no way to reposition that gear without taking the shaft out of the engine. We probably encounter a dozen or more cars in this condition that were brought to the shop.
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Yes, I read and reread and reread yet again Pelican's description of the set-screw method and it seemed flaky to me, so I'm relieved that I'm not alone in that assessment.
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Long story short, there are a lot of wrong ways to try and attempt this retrofit, and one proven right way that now even Porsche has adopted. Do it right and you do it once; do it wrong and you will be spending some serious $ to get out of the hole you created.
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I think I'll be fine if I follow Jake Raby's method to the letter.