ENGINE 3-31
CYLINDER
CYLINDER DISTORTION
• Check the gasket surface of the cylinder for distortion with a
straightedge and thickness gauge, taking a clearance reading
at several places as indicated.
• If the largest reading at any position of the straightedge
exceeds the limit, replace the cylinder with a new one.
! Cylinder distortion:
Service Limit: 0.05 mm
" 09900-20803: Thickness gauge
CYLINDER BORE
• Inspect the cylinder wall for any scratches, nicks or other
damage.
• Measure the cylinder bore diameter at six places.
! Cylinder bore:
Standard: 57.000 – 57.015 mm
" 09900-20530: Cylinder gauge set
PISTON
PISTON DIAMETER
• Using a micrometer, measure the piston outside diameter at
15 mm

A from the piston skirt end.
• If the measurement is less than the limit, replace the piston.
! Piston diameter:
Service Limit: 56.880 mm
at 15 mm from the skirt end
" 09900-20203: Micrometer (50 – 75 mm)
PISTON-TO-CYLINDER CLEARANCE
• Subtract the piston diameter from the cylinder bore diameter.
• If the piston-to-cylinder clearance exceeds the service limit,
replace the cylinder or the piston, or both.
! Piston-to-cylinder clearance:
Service Limit: 0.120 mm
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