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**COBALT** · 07-26-2004, 02:20 PM

It should be already closed I think, since the upstroke to TDC in the charge part of the cycle is compression of the fuel/air charge. It has to be in there to be compressed, so the fuel and air is homogenious for burning.

07-26-2004, 02:20 PM	#2
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	It should be already closed I think, since the upstroke to TDC in the charge part of the cycle is compression of the fuel/air charge. It has to be in there to be compressed, so the fuel and air is homogenious for burning. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.