2008 Jeep Commander 4WD V8-4.7LFACTORY OEM SERVICE PROCEDURE

System Specifications


GENERAL DESCRIPTION

General Description:

Factory service manual diagram





CYLINDER BLOCK

Cylinder Block:

Factory service manual diagram





PISTON

Pistons:

Factory service manual diagram





PISTON PINS

Piston Pins:

Factory service manual diagram





PISTON RINGS

Piston Rings:

Factory service manual diagram





CONNECTING RODS

Connecting Rods:

Factory service manual diagram





CRANKSHAFT

Crankshaft:

Factory service manual diagram





CYLINDER HEAD

Cylinder Head:

Factory service manual diagram





MAIN BEARING CAP TORQUE AND SEQUENCE

Factory service manual diagram





NOTE: Lubricate the bedplate retaining bolts with clean engine oil prior to installation.

6. Install the bedplate retaining bolts, making sure to place the stud bolts in the correct location, Torque the bolts in the sequence shown.
- Tighten bolts A - L to 54 Nm (40 ft. lbs.)
- Tighten bolts 1-10 to 2.8 Nm (25 in. lbs.)
- Turn bolts 1-10 an additional 90°.
- Tighten bolts A1- A6 to 27 Nm (20 ft. lbs.)

CRANKSHAFT MAIN BEARING SELECTION

Factory service manual diagram




The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft position sensor target wheel has grade identification marks stamped into it (3). These marks are read from left to right, corresponding with journal number 1, 2, 3, 4 and 5. The crankshaft position sensor target wheel (2) is mounted to the number 8 counter weight (1) on the crankshaft.

NOTE: Service main bearings are coded. These codes identify what size (grade) the bearing is.

Factory service manual diagram





HARMONIC BALANCER TORQUE

Factory service manual diagram




CAUTION: To prevent severe damage to the Crankshaft, Damper or Special Tool 8512-A, thoroughly clean the damper bore and the crankshaft nose before installing Damper.

1. Align vibration damper slot with key in crankshaft. Slide damper onto crankshaft slightly.

CAUTION: Special Tool 8512-A, is assembled in a specific sequence. Failure to assemble this tool in this sequence can result in tool failure and severe damage to either the tool or the crankshaft.

2. Assemble Special Tool 8512-A as follows, The nut (2) is threaded onto the shaft first. Then the roller bearing (1) is placed onto the threaded rod (3) (The hardened bearing surface of the bearing (1) MUST face the nut (2). Then the hardened washer (5) slides onto the threaded rod. Once assembled coat the threaded rod's threads with MOPAR (R) Nickel Anti-Seize or equivalent.
Factory service manual diagram




3. Using Special Tool 8512-A, press damper onto crankshaft (1).
4. Install then tighten vibration damper bolt to 175 Nm (130 ft. lbs.).




Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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