Easy way to check piston to valve clearance

[undy]

Originally Posted by Excaliber

I've heard of special light weight springs that you install to run such a check without removing the heads.

....FE rocker shaft spring works well. If it's a hydraulic cam run the rocker adjusting nut down to where the lifter becomes a "solid". Set up a dial indicator to check if you have that 0.050" to 0.100" clearance that's usually desired.