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Ol' Ron · 03-09-2015, 09:29 PM

I haven't worked on anything newer than a Flathead for the past 30 years, but back in the 60's I worked on a number of Chrysler 318 and 383 ngines and the stock clearance was .0005-,oo1. This caused the engines ti seze in very cold weather when using a multi grade oil. Once the engines were warmed up in a garage they started and ran fine, #10 wt was recommended for winter use. After a few years the oil companys fixed this problem.
As for Flatheads I use .002 on Egge pistons over the past 20 years and so far so good.

03-09-2015, 09:29 PM	#1
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: Tight Piston Clearance, Not Model A I haven't worked on anything newer than a Flathead for the past 30 years, but back in the 60's I worked on a number of Chrysler 318 and 383 ngines and the stock clearance was .0005-,oo1. This caused the engines ti seze in very cold weather when using a multi grade oil. Once the engines were warmed up in a garage they started and ran fine, #10 wt was recommended for winter use. After a few years the oil companys fixed this problem. As for Flatheads I use .002 on Egge pistons over the past 20 years and so far so good.