The exhaust valve shouldn't start to open until the pistion nears the bottom of the stroke. -- Mike > I'm pretty sure, that that is what the book has me doing. The problem > is, with #1 piston at TDC, when I rotate the cam to line up the > driving pin and slot, a valve opens, striking the piston at TDC. > > I -think- what I need to do, is lower the piston, rotate the cam to > the 'tween point that the driving pin will line up, then, raise the > piston to back to TDC and put the chain on. > > Once that's done and I rotate the engine by hand, and #1 piston is > going back down from TDC, the exhaust valve should open correct? > > Right guys??? :) >