7
2
CRANKSHAFT, CAMSHAFT AND BEARINGS
3. Check crankshaft timing gear teeth for damaged
teeth, Fig. 3.
NOTE: See Section 3 for procedure to check
crankshaft timing gear for wear.
If crankshaft timing gear teeth are damaged or worn,
the crankshaft must be replaced.
Fig. 3 – Checking Timing Gear
CHECKING MAIN BEARING CLEARANCES
If main bearings show signs of flaking or scoring,
bearings must be replaced.
Main bearing saddles in cylinder block, main bearing
caps, main bearings and crankshaft journals must be
clean and free of oil.
1. With upper main bearings installed, install crank-
shaft.
a. Lay a strip of plastigage lengthwise on journal,
Fig. 4.
Do not lay plastigage across oil hole in crankshaft
journal.
Fig. 4 – Install Plastigage
PLASTIGAGE
2. Assemble main bearing cap with bearing and
torque to 58.3 Nm (43 ft. lbs.), Fig. 5.
DO NOT ALLOW CRANKSHAFT TO ROTATE.
Fig. 5 – Torque Bearing Cap
3. Remove the bearing cap. Measure the plastigage
at its widest point, Fig. 6. If the clearance is not
within specification, replace the bearings.
Crankshaft Main Bearing Clearance:
STD: 0.020-0.044 mm (0.0008-0.0017”)
Reject: 0.07 mm (0.0028”)
Repeat procedure for each main bearing.
Fig. 6 – Measure Clearance
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