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Old 07-21-2003, 07:51 PM
psfred psfred is offline
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Synthetic oil will clean all that varnish off pronto, but you will need to change the filter a couple times on the first crankcase of synthetic oil -- it will fill up with crud pretty fast.

I'd say you have no more than a 50/50 chance the tappet will quit rattling if you use synthetic, it's very likely worn out.

Peter
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