Don, Make sure threads are not aganst the flywheel and shoulder of the bolt
is. I use Pontiac flywheel bolts on my GMC because of this. They need to be
shortened and the heads made thinner. I do this by grinding. Until I
installed 3 3/8' dowels I had some of the problems you described. The dowels
elimenated the problem..Good Luck
Subject: [Land-speed] Bad vibes
> Anyone silly enough to cut an engine in half should probably expect to
> encounter some "unusual" problems along the way. During a recent dyno
> pull, our half Windsor (3 liter inline four) sheared off all six Locktite
> secured 7/16" ARP flywheel bolts, and almost welded the flywheel to the
> crank. Seems that we have a harmonic vibration problem that has created
> more force than our system can tolerate. So.......... we probably need to
> strengthen the parts and reduce the "bad vibes".
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