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flatsix965 flatsix965 is offline
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Join Date: Apr 2011
Posts: 11
1986 930 w SC cams valve - piston clearance

Just joined the forum today looking for some help
I am rebuilding my 1986 930 engine using Wayne's book. I decided to install SC cams on it as I understood from several threads that there should not be any issues with it. While I was doing the valve to piston clearance check recommended in the manual I noticed that the clearance on the intake valve#1 was marginal (close but not quite the recommended 1.5 mm). I decided to check the other 5 intake valves and I found the same results. The closest point is after TDC when the valve is fully open. Checked all the exhaust valves and are ok (above 2mm). The SC cams is the only modification on my engine and it has not been machined so I wonder why I am having this clearance issue. Both cams were timed close to 1.55mm with .1mm valve clearance. Has anybody experienced the same? What intake valve clearance values should I expect with the SC cams on a stock 3.3 engine? Any recommendations? Thanks!!!
Old 04-20-2011, 06:33 PM
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