Honda GX690 Workshop Manual page 135

CONNECTING ROD BIG END I.D.
Set the connecting rod lower and connecting rod
bearings to the connecting rod upper and tighten the
connecting rod bolts to the specified torque.
TORQUE: 22 N·m (2.2 kgf·m, 16 lbf·ft)
Measure the connecting rod big end I.D.
STANDARD: 44.988 – 45.012 mm
(1.7712 – 1.7721 in)
SERVICE LIMIT: 45.050 mm (1.7736 in)
If the measurement is more than the service limit,
replace the connecting rod bearings (page 15-4).
CONNECTING ROD BIG END OIL
CLEARANCE
Clean all oil from the crank pin, connecting rod big end
surface and connecting rod bearings.
Place a piece of plastigauge on the crank pin, install the
connecting rod upper, the connecting rod lower and the
connecting rod bearings, and tighten the connecting rod
bolts to the specified torque.
TORQUE: 22 N·m (2.2 kgf·m, 16 lbf·ft)
• Do not rotate the crankshaft while the plastigauge is
in place.
Remove the connecting rod and measure the
plastigauge.
STANDARD: 0.005 – 0.039 mm
(0.0002 – 0.0015 in)
SERVICE LIMIT: 0.070 mm (0.0028 in)
If the clearance is more than the service limit, replace
the connecting rod bearings (page 15-4) and recheck
the clearance.
If the clearance is still more than the service limit with
the new connecting rod bearings, replace the
crankshaft (page 15-4).
CAMSHAFT CAM HEIGHT
Measure the cam height of the camshaft.
STANDARD:
IN: 29.506 – 29.706 mm (1.1617 – 1.1695 in)
EX: 29.410 – 29.610 mm (1.1579 – 1.1657 in)
SERVICE LIMIT:
IN: 29.36 mm (1.156 in)
EX: 29.26 mm (1.152 in)
If the measurement is less than the service limit,
replace the camshaft (page 15-4).
(1)
CRANKCASE
(2)
15-11