2012 Jeep Wrangler JK Factory Service Manual 09 - Engine, 3.6L

SEAL, Crankshaft Oil, Rear

REMOVAL

REMOVAL

The rear crankshaft oil seal is incorporated into the seal retainer (2) and can not be removed from the retainer. The rear crankshaft oil seal and seal retainer (2) are serviced as an assembly.

  1. Remove the automatic transmission (Refer to 21 - Transmission and Transfer Case/Automatic - 8HP45/Removal) .

    2.  
  2. Remove the flexplate .

    3.  
  3. Remove the upper oil pan (Refer to 09 - Engine/Lubrication/PAN, Oil - Removal) .

    4.  
  4. Remove the eight seal retainer attaching screws (1).

    5.  
  5. Remove and discard the seal retainer (2).

    6.  

INSTALLATION

INSTALLATION

CAUTION:

The rear crankshaft oil seal (2) and retainer (1) are an assembly. To avoid damage to the seal lip, DO NOT remove the seal protector (3) from the rear crankshaft oil seal before installation onto the engine.

CAUTION:

Whenever the crankshaft is replaced, the rear crankshaft oil seal must also be replaced. Failure to do so may result in engine fluid leakage.



  1. Inspect the crankshaft to make sure there are no nicks or burrs on the seal surface.

    2.  
  2. Clean the engine block sealing surfaces thoroughly.

    NOTE:

    It is not necessary to lubricate the seal or the crankshaft when installing the seal retainer. Residual oil following installation can be mistaken for seal leakage.


    3.  
  3. Carefully position the oil seal retainer assembly (2), and seal protector (1) on the crankshaft and push firmly into place on the engine block (during this step, the seal protector will be pushed from the rear oil seal assembly as a result of installing the rear oil seal).

    4.  
  4. Verify that the seal lip (2) on the retainer is uniformly curled inward toward the engine on the crankshaft (1).

    5.  
  5. Install the eight seal retainer bolts (1) and tighten to 12 N·m (106 in. lbs.).

    NOTE:

    Make sure that the seal retainer flange is flush with the engine block oil pan sealing surface.


    6.  
  6. Install the flexplate.

    7.  
  7. Install the automatic transmission (Refer to 21 - Transmission and Transfer Case/Automatic - 8HP45/Installation) .

    8.  
  8. Install the upper oil pan (Refer to 09 - Engine/Lubrication/PAN, Oil - Installation) .

    9.  
  9. Fill the engine crankcase with the proper oil to the correct level (Refer to 09 - Engine/Lubrication/OIL - Standard Procedure)

    10.