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I would take it to a well known crank grinder and have it polished, best to be on the safe side. As for warm ups, I typically let my car idle for about 1.5-2 mins and then drive lightly, not exceeding 2500 RPM for about 5 minutes, and then not exceeding 3000 RPM's for another 5, if at all possible.
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Proud owner of the White Dragon (a.k.a. 1991 164L)
1989 Peugeout 405 MI16, 1980 Moto Morini 3 1/2 Sport
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