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Crankshaft

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

Parts

PartCrankshaft
ManufacturerCHY
OEM part #53020959AB
Price$520.00

Labor

Replace16.5 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
Procedures5 steps
ℹ NOTE
Thoroughly inspect the connecting rod bearing bores and main bearing bores for scoring, bluing or severe scratches. Further disassembly may be required.
  1. If required, remove the main bearing halves from the cylinder block and bedplate.
  2. Thoroughly clean the bedplate to cylinder block sealing surfaces and main bearing bores. Remove all oil and sealant residue.
  3. Inspect the bedplate main bearing bores for cracks, scoring or severe bluing. If either condition exists the engine must be replaced.
  4. Inspect the crankshaft thrust washers for scoring, scratches, wear or bluing. If either condition exist replace the thrust washers.
  5. Inspect the oil pan gasket/windage tray for splits, tears or cracks in the gasket sealing surfaces. Replace gasket as necessary.
Crankshaft - Removal7 steps
ℹ NOTE
To remove the crankshaft from the engine, the engine must be removed from the vehicle.
△ CAUTION
DO NOT pry on the oil pan gasket when removing the oil pan, The oil pan gasket is mounted to the cylinder block in three locations and will remain attached to block when removing oil pan. Gasket can not be removed with oil pan.
△ CAUTION
The bedplate to cylinder block mating surface is a critical sealing surface. Do not pry on or damage this surface in anyway.
ℹ NOTE
The bedplate contains the lower main bearing halves. Use care when handling bedplate as not to drop or damage bearing halves. Installing main bearing halves in the wrong position will cause severe damage to the crankshaft.
ℹ NOTE
The bedplate has pry points cast into it. Use these points only. The pry points are shown below.
△ CAUTION
When removing the crankshaft, use care not to damage bearing surfaces on the crankshaft.
Fig. 1
Fig. 1
  1. Remove the engineEngine - Removal.
  2. Remove the engine oil pumpEngine Oil Pump - Removal.
  3. Remove the bedplate mounting bolts. Note the location of the two stud bolts for installation.
  4. Remove the connecting rods from the crankshaft.
  5. Carefully pry on the pry points to loosen the bedplate then remove the bedplate(Figure 1).
  6. Remove the crankshaft.
  7. Remove the crankshaft tone wheel.
Crankshaft - Installation11 steps
△ CAUTION
Main bearings are select fit. Refer to Crankshaft Main Bearings for proper bearing selections.
△ CAUTION
When installing the crankshaft, use care not to damage bearing surfaces on the crankshaft.
ℹ NOTE
Apply sealant to the tone wheel retaining screws prior to installation.
△ CAUTION
The bedplate to cylinder block mating surface must be coated with Mopar(R) Engine RTV sealant prior to installation. Failure to do so will cause severe oil leaks.
ℹ NOTE
Make sure that the bedplate and cylinder block sealing surfaces are clean and free of oil or other contaminants. Contaminants on the sealing surfaces may cause main bearing distortion and/or oil leaks.
ℹ NOTE
Lubricate the bedplate retaining bolts with clean engine oil prior to installation.
Fig. 1
Fig. 1
Fig. 2
Fig. 2
Fig. 3
Fig. 3
Fig. 4
Fig. 4
Fig. 5
Fig. 5
  1. Lubricate upper main bearing halves with clean engine oil.
  2. Install the crankshaft tone wheel. Tighten the mounting screws to 15 Nm (11 ft. lbs.)
  3. Position crankshaft in cylinder block.
  4. Install the thrust washers (1).
  5. Apply a 2.5mm (0.100 inch) bead of Mopar(R) Engine RTV sealant to the cylinder block-to-bedplate mating surface (2,3) as shown.
  6. Coat the crankshaft main bearing journals with clean engine oil and position the bedplate onto the cylinder block.
  7. 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 to 54 Nm (40 ft. lbs.) -Tighten bolts 1 - 8 to 7 Nm (5 ft. lbs.) -Turn bolts 1 - 8 an additional 90°. -Tighten bolts A - E 27 Nm ( 20 ft. lbs.).
  8. Measure crankshaft end play.
  9. Install the connecting rods and measure side clearance Piston And Connecting Rod - Piston Fitting.
  10. Install oil pumpEngine Oil Pump - Installation.
  11. Install the engineEngine - Installation.
Crankshaft: Description and Operationreference
Fig. 1
Fig. 1
Fig. 2
Fig. 2
DESCRIPTION The crankshaft (Figure 1) is constructed of nodular cast iron. The crankshaft is a three throw split pin design with six counterweights for balancing purposes. The crankshaft is supported by four select fit main bearings with the number two serving as the thrust washer location. The main journals of the crankshaft are cross drilled to improve rod bearing lubrication. The number six counterweight has provisions for crankshaft position sensor target wheel mounting. The select fit main bearing markings are located on the rear side of the target wheel. The crankshaft oil seals are one piece design. The front oil seal is retained in the timing chain cover, and the rear seal is pressed in to a bore formed by the cylinder block and the bedplate assembly.
Factory service manual
From the 2008 KK factory manual — descriptions, specs, torque & procedures for this part.
CRANKSHAFT📷 1
The crankshaft is constructed of nodular cast iron. The crankshaft is a three throw split pin design with six counterweights for balancing purposes. The crankshaft is supported by four select fit main bearings with the number two serving as the thrust washer location. The main journals of the crankshaft are cross drilled to improve rod bearing lubrication. The number six counterweight has provisions for crankshaft position sensor target wheel mounting. The select fit main bearing markings are located on the rear side of the target wheel. The crankshaft oil seals are one piece design. The front oil seal is retained in the timing chain cover, and the rear seal is pressed in to a bore formed by the cylinder block and the bedplate assembly. See Fig. 99.
1 - CRANKSHAFT 2 - CRANKSHAFT POSITION SENSOR TARGET RING
figure
CRANKSHAFT📷 1
NOTE: To remove the crankshaft from the engine, the engine must be removed from the vehicle.
1. Remove the engine. See REMOVAL. 2. Remove the engine oil pump. See REMOVAL.
CAUTION: DO NOT pry on the oil pan gasket when removing the oil pan, The oil pan gasket is mounted to the cylinder block in three locations and will remain attached to block when removing oil pan. Gasket can not be removed with oil pan.
3. Remove the bedplate mounting bolts. Note the location of the two stud bolts for installation. 4. Remove the connecting rods from the crankshaft.
CAUTION: The bedplate to cylinder block mating surface is a critical sealing surface. Do not pry on or damage this surface in anyway.
NOTE: The bedplate contains the lower main bearing halves. Use care when
handling bedplate as not to drop or damage bearing halves. Installing main bearing halves in the wrong position will cause severe damage to the crankshaft.
NOTE: The bedplate has pry points cast into it. Use these points only. The pry points are shown in illustration.
5. Carefully pry on the pry points to loosen the bedplate then remove the bedplate. See Fig. 100.
CAUTION: When removing the crankshaft, use care not to damage bearing surfaces on the crankshaft.
6. Remove the crankshaft. 7. Remove the crankshaft tone wheel.
figure
CRANKSHAFT
NOTE: Thoroughly inspect the connecting rod bearing bores and main bearing bores for scoring, blueing or severe scratches. Further disassembly may be required.
If connecting rod bearing bores show damage, the cylinder heads must be removed to service the piston and rod assemblies. If the bedplate or the cylinder block main bearing bores show damage the engine must be replaced.
1. If required, remove the main bearing halves from the cylinder block and bedplate. 2. Thoroughly clean the bedplate to cylinder block sealing surfaces and main bearing bores. Remove all oil and sealant residue. 3. Inspect the bedplate main bearing bores for cracks, scoring or severe blueing. If either condition exists the engine must be replaced. 4. Inspect the crankshaft thrust washers for scoring, scratches, wear or blueing. If either condition exist replace the thrust washers. 5. Inspect the oil pan gasket/windage tray for splits, tears or cracks in the gasket sealing surfaces. Replace gasket as necessary.
CRANKSHAFT📷 3
1 - CRANKSHAFT THRUST WASHER
CAUTION: Main bearings are select fit. Refer to CRANKSHAFT MAIN BEARINGS for proper bearing selections.
CAUTION: When installing crankshaft, use care not to damage bearing surfaces on the crankshaft.
NOTE: Apply sealant to the tone wheel retaining screws prior to installation.
1. Lubricate upper main bearing halves with clean engine oil. 2. Install the crankshaft tone wheel. Tighten the mounting screws to 15 N.m (11 ft. lbs.) 3. Position crankshaft in cylinder block.
4. Install the thrust washers (1).
1 - CYLINDER BLOCK 2 - SEALANT 3 - SEALANT
CAUTION: The bedplate to cylinder block mating surface must be coated with Mopar® Engine RTV sealant prior to installation. Failure to do so will cause severe oil leaks.
NOTE: Make sure that the bedplate and cylinder block sealing surfaces are clean and free of oil or other contaminants. Contaminants on the sealing surfaces may cause main bearing distortion and/or oil leaks.
5. Apply a 2.5 mm (0.100 inch) bead of Mopar® Engine RTV sealant to the cylinder block-to-bedplate mating surface (2,3) as shown in illustration.
6. Coat the crankshaft main bearing journals with clean engine oil and position the bedplate onto the cylinder block.
NOTE: Lubricate the bedplate retaining bolts with clean engine oil prior to

Installation

7
Install the bedplate retaining bolts, making sure to place the stud bolts in the correct location, Tighten the
bolts in the sequence shown in illustration. Hand tighten bolts 1D, 1G and 1F until the bedplate contacts the block. Tighten bolts 1A - 1J to 54 N.m (40 ft. lbs.) Tighten bolts 1 - 8 to 7 N.m (5 ft. lbs.) Turn bolts 1 - 8 an additional 90°. Tighten bolts A - E 27 N.m (20 ft. lbs.).
8
Measure crankshaft end play.
9
Install the connecting rods and measure side clearance. See STANDARD PROCEDURE.
10
Install oil pump. See INSTALLATION.
11
Install the engine. See INSTALLATION.
BEARINGS-CRANKSHAFT MAIN
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