I've heard of this happening but haven't personally experienced it. During
my engine rebuild, I noticed the material in my damper was deteriorating.
Not wanting to take any chances, I had a company called "Damper Dudes"
replace the material in my damper.
Damper Dudes 1-800-413-2673
Terry Geiger
74 Triumph TR6 (for sunny days)
84 Mercedes Benz 300D Turbo Diesel (for the wife to drive)
90 Chevy S10 (to fetch parts for the first two)
>
> here is my diagnosis: the harmonic balancer is rotating or slipping at
> high
> rpm. This would account for why the timing would "appear" to be off. My
> then resetting the timing without determining TDC would account for the
> somewhat rough running engine. Basically I was using a false indicator to
> set the timing.
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