Jeep Wrangler/YJ 1987-1995 Repair Guide

Rocker Arms and Pushrods

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REMOVAL & INSTALLATION



2.5L Engine

See Figures 1, 2, 3, 4, 5 and 6



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Fig. Fig. 1: Rocker arms and bridge-all engines



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Fig. Fig. 2: Rocker arms and puhrods



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Fig. Fig. 3: Remove the two capscrews at each bridge and pivot assembly



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Fig. Fig. 4: Removing the bridge assembly



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Fig. Fig. 5: Removing the rocker arm



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Fig. Fig. 6: Removing the pushrod

  1. Remove the rocker arm cover as previously outlined.
  2.  
  3. Remove the two capscrews at each bridge and pivot assembly. It's best to remove the capscrews alternately, a little at a time each to avoid damage to the bridge.
  4.  
  5. Remove the bridges, pivots and rocker arms. Keep them in order.
  6.  
  7. Remove the pushrods and keep them in order.
  8.  

To install:
  1. Install the pushrods, rocker arms and bridge and pivot assemblies in their original order. Tighten the capscrews to 19 ft. lbs. (26 Nm).
  2.  
  3. Clean the mating surfaces of the cover and head.
  4.  
  5. Run a 1 / 8 in. (3mm) bead of RTV sealer around the mating surface of the head. Install the cover within 10 minutes! Don't allow any of the RTV material to drop into the engine! In the engine it will form and set and possibly block and oil passage. Torque the cover bolts to 36-60 inch lbs. (4-6.7 Nm)
  6.  

4.0L and 4.2L Engine

See Figure 1

On these engines, the rocker arms operate on a bridged pivot that is secured with two capscrews. The bridged pivots maintain proper rocker arm-to-valve tip alignment.

  1. Remove the rocker cover and gasket, if used.
  2.  
  3. Remove the two capscrews at each bridged pivot, backing off each capscrew one turn at a time to avoid breaking the bridge.
  4.  
  5. Remove each bridged pivot and corresponding pair of rocker arms. Place them on a clean surface in the same order as they are removed.
  6.  
  7. Remove the pushrods and keep them in order.
  8.  

Bridged pivots, capscrews, rockers and pushrods must all be reinstalled in their original positions.

  1. Clean all the parts in a suitable solvent and use compressed air to blow out the oil passages in the pushrods and the rocker arms. Replace any excessively worn parts.
  2.  

To install:
  1. Install the rocker arms, pushrods and bridged pivots in the same positions from which they were removed.
  2.  

Be sure that the bottom end of each pushrod is centered in the plunger cap of the hydraulic valve tappet from which it was removed.

  1. Install the capscrews and tighten them one turn at a time, alternating between the two screws on each bridge. Tighten the capscrews to 21 ft. lbs. (28 Nm).
  2.  
  3. Install the rocker arm cover(s) as previously outlined.
  4.  

 
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