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Crankshaft Main Bearing

Engine, Cooling and Exhaust › Engine
Unified entry — merged from multiple cross-listed pages in the original manual.

Parts

PartGrade R
ManufacturerCHY
OEM part #5066733AB
Price$18.35
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade S
ManufacturerCHY
OEM part #5066735AB
Price$22.60
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade T
ManufacturerCHY
OEM part #5066737AB
Price$22.60
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade U
ManufacturerCHY
OEM part #5066739AB
Price$20.20
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade R
ManufacturerCHY
OEM part #5066734AB
Price$18.35
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade S
ManufacturerCHY
OEM part #5066736AB
Price$22.70
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade T
ManufacturerCHY
OEM part #5066738AB
Price$22.70
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.
PartGrade U
ManufacturerCHY
OEM part #5066740AB
Price$20.20
NotesIncludes: Standard Upper And Lower Bearing For One Journal. Order By Grade.

Labor

Replace — Main Bearings15.9 hr
Warranty 0.0 hrSkill A
With Auto Trans, Add0.2 hr
Warranty 0.0 hrSkill A
With 4WD, Add1.0 hr
Warranty 0.0 hrSkill A
Main & Rod Bearings16.5 hr
Warranty 0.0 hrSkill A
With Auto Trans, Add0.2 hr
Warranty 0.0 hrSkill A
With 4WD, Add1.0 hr
Warranty 0.0 hrSkill A
Procedures
Crankshaft Main Bearing: Specificationsreference
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CRANKSHAFT MAIN BEARING Install the bedplate retaining bolts, making sure to place the stud bolts in the correct location, Tighten the bolts in the sequence shown. Hand tighten bolts 1D,1G and 1F until the bedplate contacts the block. Tighten bolts 1A - 1J 54 Nm (40 ft. lbs.) Tighten bolts 1 - 8 7 Nm (5 ft. lbs.) Turn bolts 1 - 8 an additional 90° Tighten bolts A - E 27 Nm ( 20 ft. lbs.) Bearing Clearance 0.002 - 0.046 mm (0.00008 - 0.0018 in.) CRANKSHAFT MAIN BEARING SELECTION
Crankshaft Main Bearing: Service and Repair1 step
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  1. Service main bearings are available in four grades. The chart identifies the four service grades available.
Factory service manual
From the 2008 KK factory manual — descriptions, specs, torque & procedures for this part.
SELECT FIT IDENTIFICATION📷 1
1 - REARMOST CRANKSHAFT COUNTER WEIGHT 2 - TARGET WHEEL
3 - MAIN BEARING SELECT FIT MARKINGS
The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft position sensor target wheel (2) has grade identification marks stamped into it. These marks are read from left to right, corresponding with journal number 1, 2, 3, 4. The crankshaft position sensor target wheel is mounted to the number 6 counter weight (1) on the crankshaft. See Fig. 104.

Inspection

Wipe the inserts clean and inspect for abnormal wear patterns and for metal or other foreign material imbedded in the lining. Normal main bearing insert wear patterns are illustrated.
Inspect the back of the inserts for fractures, scrapings or irregular wear patterns.
Inspect the upper insert locking tabs for damage.
Replace all damaged or worn bearing inserts.
figure
MAIN BEARING JOURNAL DIAMETER (CRANKSHAFT REMOVED)
Remove the crankshaft from the cylinder block. See REMOVAL.
Clean the oil off the main bearing journal.
Determine the maximum diameter of the journal with a micrometer. Measure at two locations 90° apart at each end of the journal.
The maximum allowable taper is 0.008 mm (0.0004 inch.) and maximum out of round is 0.005mm (0.002 inch). Compare the measured diameter with the journal diameter specification (MAIN BEARING FITTING CHART). Select inserts required to obtain the specified bearing-to-journal clearance.
Install the crankshaft into the cylinder block. See INSPECTION.
Check crankshaft end play.
CRANKSHAFT MAIN BEARING SELECTION
Crankshaft Marking JOURNAL SIZE SIZE mm (in.) "R" Size 63.488 - 63.496 mm (2.4995 - 2.4998 in.)
         "S" Size            63.496 - 63.500 mm (2.4998 - 2.4999 in.)
         "T" Size            63.500 - 63.504 mm (2.4999 - 2.501 in.)
         "U" Size            63.504 - 63.512 mm (2.5001 - 2.5004 in.)
Bearing size Bearing Code Size Application
Upper Bearing
A.2.443 - 2.447 mmUse with crankshaft size "R"
(.0961 -.0963 in.)-
B2.439 - 2.443 mmUse with crankshaft "S, T"
(0.960 -.0961 in.)-
C2.435 - 2.439 mmUse with crankshaft "U"
(.0958 -.0960 in.)-
Lower Bearing Main "1" and "4"
"1"2.441 - 2.447 mmUse with crankshaft "R, S"
-(.0961 -.0963 in.)
"2"2.435 - 2.441 mmUse with crankshaft "T, U"
-(.0958 -.0962 in.)
Lower Main Bearing "2" and "3"
"3"2.429 - 2.435 mmUse with crankshaft "R, S"
-(.0956 -.0958 in.)
"4"2.423 - 2.429 mmUse with crankshaft "T, U"
-(.0953 -.0956 in.)
Bearing Clearances Main "1, 4"
Crankshaft "R"                                 .004 -.034 mm (.00015 - .0013 in.)
Crankshaft "S"                                 .004 -.030 mm (.00015 - .0011 in.)
Crankshaft "T"                                  .006 -.032 mm (.0002 - .0012 in.)
Crankshaft "U"                                 .002 -.032 mm (.00007 - .0012 in.)
Main "2, 3"
Crankshaft "R"                                  .016 -.046 mm (.0006 - .0018 in.)
Crankshaft "S"                                  .016 -.042 mm (.00062 - .016 in.)
Crankshaft "T"                                  .018 -.044 mm (.0007 - .0017 in.)
Crankshaft "U"                                  .014 -.044 mm (.0005 - .0017 in.)
1. Service main bearings are available in four grades. The chart identifies the four service grades available.
SEAL-CRANKSHAFT OIL-FRONT