94
POWERHEAD
CYLINDER/CRANKCASE/PISTON
Crank pin outside diameter difference (out-of-
round and taper):
•
Service limit – 0.0004 in. (0.010 mm)
If the out-of-round or the taper exceeds the ser-
vice limit, replace the crankshaft.
Crank pin outside diameter:
•
0.7476 to 0.7480 in. (18.990 to 19.000 mm)
Check the big end oil clearance. Clean the sur-
face of the connecting rod, the connecting rod
cap, and the crank pin. Place a piece of a plasti-
gauge on the crank pin parallel to the crankshaft,
avoiding the oil hole.
Install the connecting rod and the connecting rod
cap on the crank pin. Install the two connecting
rod bolts and tighten the bolts in two steps:
•
First torque: 2.5 ft. lbs. (5 N·m)
•
Final torque: 5.0 ft. lbs. (7 N·m)
IMPORTANT:
Do not rotate the connecting rod
with the plastigauge in place.
Remove the connecting rod and the connecting
rod cap from the crank pin. Measure the clear-
ance.
Connecting rod big end oil clearance:
•
Standard – 0.0006 to 0.0014 in. (0.15 to 0.035
mm)
•
Service limit – 0.0031 in. (0.080 mm)
If the measurement exceeds the service limit,
replace the connecting rod assembly and/or
crankshaft.
Connecting rod big end inside diameter:
•
0.7486 to 0.7490 in. (19.015 to 19.025 mm)
Crankshaft Runout
Measure the crankshaft runout.
Crankshaft runout:
•
0.002 in. (0.05 mm)
If the measurement exceeds the service limit,
replace the crankshaft.
Oil Seal and Bearing
Visually check the oil seals installed in the cylinder
block and crankcase for cuts, nicks, excessive
wear, or other damage.
006091
1.
Bolt (2)
006092
1
006094
006095
