Originally Posted by
Roelof
Then measure the real gap by using a piece of 1mm solder and squeeze it between the piston and chamber when turning the engine one turn around. The squeezed part will give the real head clearance. That should be around 0.6mm
If Im going to measure the real clearance its not going to be pressing the piston against solder. I would do the caliper method measuring the depth from top of the sleeve to piston, then chamber to head and subtract them.