5. Inspection and servicing of basic engine parts
202
5.4.2 Crank pin metal
(1) Checking crank pin metal
Check for flaking, melting or seizure on the
contact surface of the crank pin metal.
(2) Measuring crank pin oil clearance
Measure the crankpin outside diameter and
the crank pin metal inside diameter. Calculate
the oil clearance from the measured values.
(Refer to 5.5.1(3) for measuring the crank pin
outside diameter.)
Replace the crank pin metal if the oil
clearance becomes about the limit dimension
of the below table.
Correct by grinding if unevenly wear,
roundness exceeding the limit or insufficient
outside diameter is found. Also use an
undersized metal if necessary.
[NOTICE]
When measuring the inside diameter of the
rod big end, install the crank pin metal in the
rod big end not to mistake the top and
bottom of the metals and tighten the rod
bolts by the standard torque.
• Other procedure of measuring crank pin oil
clearance
1) Use the press gauge (Plasti-gauge) for
measuring the oil clearance of the crank pin.
2) Mount the connecting rod on the crank pin
(tighten to specified torque).
3) Remove the connecting rod and measure the
broken plasti-gauge with measuring paper.
Nm (kgf•m)
Rod bolt tightening
torque
44.1-49.1
(4.50-5.01)
mm
Item Standard Limit
Rod metal I.D. 48.000-48.026 -
Crankpin O.D. 47.952-47.962 47.902
Metal thickness 1.492-1.500 -
Clearance 0.038-0.074 0.150
Cylinder gauge
008727-01E
Plasti-gauge
008286-01E
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