158
POWERHEAD
CRANKSHAFT, PISTONS AND CAMSHAFT
•
Apply engine oil to screws and tighten in two
steps to 102 in. lbs. (12 N·m).
•
Remove rods and caps from crankpin.
•
Measure the compressed Plastigage at its wid-
est point.
Connecting rod big end oil clearance:
•
Standard: 0.0008 to 0.0012 in. (0.020 to 0.030
mm).
•
Service limit: 0.0026 in. (0.065 mm)
If measurement exceeds service limit, replace
connecting rod and/or crankshaft.
Crankshaft
Measure crankshaft runout using “V” blocks and a
dial indicator. If measurement exceeds service
limit, replace crankshaft and/or crankcase.
Crankshaft runout:
•
Service limit: 0.002 in. (0.05 mm)
Inspect timing gear. Replace crankshaft if dam-
aged or worn.
Oil Seals and Bearings
Visually check the oil seals in the cylinder block
and bottom crankcase for cuts, nicks, excessive
wear or other damage.
Check main bearings for pitting and noisy or
rough operation.
005723
005724
005725
005726
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