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(c) Piston ring, ring groove and end clearance
measurement
Except for the top ring, to measure the piston ring
groove width, first measure the width of the piston
ring. Then insert the piston ring into the ring. Then
insert the piston ring into the ring groove. Insert a
thickness gage in between the piston ring and
groove to measure the gap between them. Obtain
the ring groove width by adding ring width to the
measured side clearance.
To measure the end clearance, push the piston
ring into the sleeve using the piston head, insert a
thickness gage in end clearance to measure. The
ring shall be pushed in to approx. 30 mm above
the bottom end of the cylinder. For the top ring,
measure only the piston ring joint end
clearance in normal state.
