Jeep Wrangler/YJ 1987-1995 Repair Guide

Rear Main Oil Seal

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REPLACEMENT



2.5L Engine

See Figure 1

  1. Remove the transmission.
  2.  
  3. Remove the flywheel.
  4.  
  5. Pry out the seal from around the crankshaft flange.
  6.  

To install:
  1. Coat the inner lip of the new seal with clean engine oil.
  2.  
  3. Gently tap the new seal into place, flush with the block, using a rubber or plastic mallet.
  4.  



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Fig. Fig. 1: Crankshaft oil seal location-2.5L, 4.0L and 4.2L engines

  1. Install the flywheel.
  2.  

New bolts MUST be used when installing the flywheel or torque converter plate. Tighten the new bolts to 50 ft. lbs. (68 Nm).

  1. Install the transmission.
  2.  

4.0L and 4.2L Engines

See Figures 1, 2 and 3

This seal is a two piece neoprene type with a single lip.

  1. Raise and support the vehicle on jackstands.
  2.  
  3. Remove the transmission.
  4.  
  5. Remove the flywheel or converter drive plate.
  6.  
  7. Remove the oil pan.
  8.  
  9. Remove the rear main bearing cap and discard the lower seal.
  10.  
  11. Using a center punch, carefully drive the upper half of the seal out of the block just far enough to graph with a pliers and pull out.
  12.  



Click image to see an enlarged view