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patkeefe patkeefe is offline
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Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,843
When #1 fires, it as at the nominal top of the stroke, between Compression and Power. Ay this instant, #4 should be at the top between Exhaust and Intake, Unless you have zero overlap in the cams, or your valve lash is set incorrectly, you shouldn't have the valve lash you describe.

Try taking the valve covers off, and watching the valve motions on #1 and #4 for a few rotations of the crank, to see what's what. Just follow along with the I-C-P-E routine a bit, and it will become apparent if you timed the cams wrong.

Patrick E. Keefe
78 SC
01 Boxster
Old 11-25-2007, 10:37 AM
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