Polaris TRAIL BOSS 325 2001, Manual

Page: 101 / 296

ENGINE
3.45
CONNECTING ROD BEARING INSPECTION
1. Inspect bearing inserts for unusual wear, peeling,
scoring, damage etc. Replace as necessary.
NOTE: If one insert requires replacement, replace both
connecting rod bearing inserts as a set.
CONNECTING ROD BEARING CLEARANCE INSPECTION
1. Clean all oil from bearing inserts and crank pin.
2. Place a strip of Plastigauge
“
across the complete
width of the crank pin.
3. Install the connecting rod and bearing cap in the
correct orientation.
4. Torque the rod nuts to specification.
5. Remove the bearing cap being careful not to
disturb the Plastigauge
“
.
6. Use the measuring scale on the Plastigauge
“
wrapper to measure the thickness of the
Plastigauge
“
. The rod must not turn during
this procedure.
NOTE: Use the widest part of the Plastigauge
“
to de-
termine the oil clearance.
7. If oil clearance is not within specification, install
new rod bearings and recheck the oil clearance.
8. If service limit is still exceeded, determine if the
crankshaft or connecting rod needs to be replaced
per Crankshaft Inspection and Connecting Rod
Inspection.
9. At completion of measurement procedure;
remove all traces of Plastigauge
“
from bearing
and crankshaft.
Rod Nut Torque:
29-33 ft./lbs. (39-45 Nm)
Connecting Rod To Crankshaft Clearance:
Std: .0007-.0021 (.019-.053 mm)
Limit: .0026 (.065 mm)