5. Inspection and servicing of basic engine parts
198
(2) Measuring piston ring gap (End clearance)
Press the piston ring onto a piston liner and
measure the piston ring gap with a gauge.
Press on the ring about 30mm from the bottom
of the liner.
(3) Removing the piston rings
1) Thoroughly clean the ring grooves when
removing piston rings.
2) The side with the manufacturer’s mark
should face up.
3) After fitting the piston ring, make sure it
moves easily and smoothly.
4) Adjust the piston ring gaps at 120° intervals,
making sure they don't line up.
mm
Standard Limit
Top ring gap 0.200-0.400 0.490
Second ring gap 0.200-0.400 0.490
Oil ring gap 0.200-0.400 0.490
001524-01E
Approx.
30 mm
Head surface
Cylinder block
Piston ring
Gap
Make the punched manufacturer's
mark face upward.
011078-00E
120
120
120
1st piston ring gap
2nd piston ring gap
Oil ring gap
Direction of
piston pin
011747-00E
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