Valve Clearance - Number of cylinders

So am I wrong in getting cam at full lift, and measuring from there until the valve hits the piston? With a checking spring.


YES. The piston is a mile down the hole at max lift.

That’s your intake centerline number.

My junk goes in at 105 ICL. That means at 105 degrees AFTER top dead center the valve is it max lift.

You’d have to lift the valve 2 inches (that’s a WAG but you can measure that) for the valve to hit there.

Your valves will be closest to the piston 10 degrees before and after TDC.

What you are doing is checking your clearance in overlap with the piston around TDC.