Measure the piston head projection value for each cylinder using the dial indicator.
-1.
Set the dial indicator (A) on the engine block.
-2.
Zero the dial indicator at the point B on the engine block, then measure the projection value at the point C on the piston head. Do the same procedure at the point D, after zero the indicator at the point E.
-3.
Average of the measured values.
-4.
Measure the piston head projection value at other three pistons, and note the highest piston head projection value.