10-16
CAM PULLEY/CRANKSHAFT/ PISTON/CYLINDER HRX217HYA • HRX217HZA
PISTON SKIRT O.D.
Measure and record the piston O.D. at a point 10 mm (0.4 in) from
the bottom of the skirt and 90 degrees to the piston pin bore.
If the measurement is less than the service limit, replace the
piston.
PISTON-TO-CYLINDER CLEARANCE
Subtract the piston skirt O.D. from the cylinder sleeve I.D. to obtain
the piston-to-cylinder clearance.
If the calculated clearance is more than the service limit, replace
the piston and recheck the clearance.
If the clearance is still more than the service limit with the new
piston, replace the cylinder.
PISTON RING WIDTH
Measure each piston ring width.
If any of the measurements is less than the service limit, replace
the piston rings (top, second, oil) as a set.
PISTON RING SIDE CLEARANCE
Measure the clearance between each piston ring and ring groove
of the piston using feeler gauge.
If the calculated clearance is more than the service limit, replace
the piston rings (top, second, oil) as a set and recheck the
clearance.
If the clearance is still more than the service limit with the new
piston ring, replace the piston.
STANDARD: 65.970 – 65.990 mm (2.5972 – 2.5980 in)
SERVICE LIMIT: 65.850 mm (2.5925 in)
STANDARD: 0.010– 0.045 mm (0.0004 – 0.0018 in)
SERVICE LIMIT: 0.085 mm (0.0033 in)
STANDARD:
Top: 0.935 – 0.950 mm (0.0368 – 0.0374 in)
Second: 0.975 – 0.990 mm (0.0384 – 0.0390 in)
Oil: 2.380 – 2.460 mm (0.0937 – 0.0969 in)
SERVICE LIMIT:
Top: 0.890 mm (0.0350 in)
Second: 0.930 mm (0.0366 in)
Oil: 2.370 mm (0.0933 in)
STANDARD:
Top: 0.055 – 0.089 mm (0.0022 – 0.0035 in)
Second: 0.015 – 0.049 mm (0.0006 – 0.0019 in)
Oil: 0.045 – 0.144 mm (0.0018 – 0.0057 in)
SERVICE LIMIT:
Top: 0.190 mm (0.0075 in)
Second: 0.15 mm (0.006 in)
Oil: 0.240 mm (0.0094 in)
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