ENGINE
3.31
CRANKSHAFT
MAIN BEARING INSPECTION
1.
Inspect the crankshaft main bearings.
NOTE:
Due to extremely close tolerances and
minimal wear, the bearings must be inspected
visually, and by feel. Look for signs of discoloration,
scoring or galling. Turn the outer race of each bearing.
The bearings should turn smoothly and quietly. The
inner race of each bearing should fit tightly in the
crankshaft.
The outer race should be firm with
minimal side to side movement and no detectable up
and down movement.
2.
Replace bearings if they fail visual inspection.
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.
Rod Nut Torque:
29-33 ft. lbs. (39-45 Nm)
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
determine the oil clearance.
Connecting Rod To Crankshaft Clearance:
Std: .0007-.0021 (.019-.053 mm)
Limit: .0026 (.065 mm)
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.
CRANKCASE BEARING
INSPECTION
1.
Inspect the crankshaft main bearing in the MAG
side crankcase.
NOTE:
Due to extremely close tolerances and
minimal side wear, the bearing must be inspected
visually and by feel. Look for signs of discoloration,
scoring or galling. Turn the inner race of bearing. The
bearing should turn smoothly and quietly. The outer
race should fit tightly in the crankcase. The inner race
should be firm with minimal side to side movement
and no detectable up and down movement.
2.
To remove crankshaft bearing, use a blind hole
bearing puller.
NOTE: Bearings are stressed during the removal
procedure and should not be re-used
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Summary of Contents for 2009 Trail Blazer 330
Page 94: ...ENGINE 3 48 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 110: ...FUEL SYSTEM CARBURETION 4 16 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 124: ...BODY STEERING SUSPENSION 5 14 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 196: ...ELECTRICAL 10 4 REVERSE LIMIT SYSTEM P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 226: ...ELECTRICAL 10 34 NOTES P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 227: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BOSS P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 228: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BOSS P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 229: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BLAZER P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...
Page 230: ...ELECTRICAL WIRING DIAGRAM 2009 TRAIL BLAZER P a r t S h a r k c o m 8 7 7 9 9 9 5 6 8 6 ...