Nissan Z - ZX 1970-1988 Repair Guide

Rocker Arms/Shafts

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REMOVAL & INSTALLATION



Except VG Engines

See Figure 1

  1. Refer to the Rocker Arm Cover removal and installation procedures in this section, then remove the rocker arm cover.
  2.  
  3. Using a small pry, compress the valve spring(s) and remove the rocker arm(s) from the valve(s) and the valve rocker pivot(s).
  4.  



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Fig. Fig. 1: Use a suitable prytool to compress the valve spring

If necessary to remove the rocker arm pivots, loosen the locknut, then unscrew the pivot from the cylinder head.

  1. Inspect the rocker arms, the rocker pivots and the camshaft for wear and/or damage; if necessary, replace the damaged parts.
  2.  
  3. To install, reverse the removal procedures. Tighten the bushing bolt to 58-87 ft. lbs. (75-113 Nm); the pivot locknuts to 36-43 ft. lbs. (47-56 Nm), the oil pivot to 33-40 ft. lbs. (43-52 Nm); the cover bolts to 33-40 inch lbs. (4-5 Nm).
  4.  

VG Engines

See Figures 2, 3, 4 and 5

  1. Refer to the Rocker Arm Cover removal and installation procedures in this section, then remove the rocker arm cover.
  2.  
  3. Remove the rocker arm shaft-to-cylinder head bolts and lift the rocker arm/shaft assembly from the cylinder head.
  4.  
  5. Separate the rocker arms from the shaft.
  6.  

When separating the rocker arms from the rocker arm shafts, be sure to keep the parts in order for reinstallation purposes.

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Fig. Fig. 2: Proper rocker arm shaft placement



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Fig. Fig. 3: Remove the rocker shaft retainer bolts



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Fig. Fig. 4: Lift the entire assembly up and out of the engine compartment



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Fig. Fig. 5: When installing the rocker arm shaft, tighten the bolts to the correct specification

  1. Check the rocker arms, the shafts, the valves and the valve lifter for damage. If necessary, replace the damaged components.
  2.  

When installing the rocker arm shafts, be certain that they are installed in their original positions.

  1. To install, reverse the removal procedures. Tighten the rocker arm shaft bolts to 13-16 ft. lbs. (17-21 Nm).
  2.  

 
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