Chrysler Full-Size Vans 1967-1988 Repair Guide

Rocker Shafts

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

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Fig. Fig. 1: Inline 6-cylinder adjustable style rocker arm and shaft components



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Fig. Fig. 2: After removing the rocker arm cover on L6 engines, remove the rocker shaft retaining bolts ...



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Fig. Fig. 3: ... then lift the rocker shaft assembly from the cylinder head



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Fig. Fig. 4: Before installing the rocker arm shaft and cover, scrape the old gasket off of the cylinder head

The rocker arm shaft has 12 straight steel rocker arms arranged on it with hardened steel spacers fitted between each pair of rocker arms. The shaft is secured by bolts and steel retainers which are attached to the 7 cylinder head brackets. To remove the rocker arm and shaft:

Inline 6-Cylinder Engines

  1. Remove the closed ventilation system.
  2.  
  3. Remove the evaporative control system (if so equipped).
  4.  
  5. Remove the valve cover and its gasket.
  6.  
  7. Remove the rocker shaft bolts and retainers.
  8.  
  9. Remove the rocker arm and shaft assembly.
  10.  
  11. Reverse the above for installation. The oil hole on the end of the shaft must be on top and point toward the front of the engine to provide proper lubrication to the rocker arms. The special bolt goes to the rear. 6-238, 8-318, 8-360, 8-400, 8-4407. Torque all bolts to 25 ft. lbs.
  12.  
  13. Temporarily set the intake valve tappet at 0.015" and the exhaust valve at 0.025".
  14.  
  15. Run the engine at 550 rpm until it is fully warmed up and adjust the valves.
  16.  

V6 and V8 Engines

See Figures 5, 6, 7 and 8



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Fig. Fig. 5: Proper rocker arm locations on the shaft for V8 engines-the rocker arms are either stamped with an R or an L



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Fig. Fig. 6: The V6 rocker shaft is similar to the V8 one except it has two less rockers and one less attaching bolt



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Fig. Fig. 7: After removing the valve cover on V8 engines, remove the rocker arm shaft retaining bolts ...



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Fig. Fig. 8: ... then lift the rocker shaft assembly from the cylinder head as one unit

The stamped steel rocker arms are arranged on one rocker arm shaft per cylinder head. Because the angle of the pushrods tend to force the rocker arm pairs toward each other, oilite spacers are fitted to absorb the side thrust at each rocker arm. The shaft is secured by bolts and steel retainers attached to the brackets on the cylinder head. To remove the arm and shaft from each cylinder head:

  1. Disconnect the spark plug wires.
  2.  
  3. Disconnect the closed ventilation system and evaporative control system (if so equipped) from the valve cover.
  4.  
  5. Remove each valve cover and gasket.
  6.  
  7. Remove the rocker shaft bolts and retainer.
  8.  
  9. Remove each rocker arm and shaft assembly. Keep everything in order for installation in the original position.
  10.  
  11. Reverse the above for installation. The notch on the end of both 318 and 360 rocker shafts should point to the engine centerline and toward the front of the engine on the left cylinder head and toward the rear on the right side. On the 400 and 440, the rocker arm lubrication holes must point down and toward the valves. Torque the rocker shaft bolts to 17 ft. lbs. on the 318 and 360, and 25 ft. lbs. on the others.
  12.  

Diesel Engine

See Figure 9



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Fig. Fig. 9: Diesel rocker arm and shaft components

  1. Remove the valve cover and gasket.
  2.  
  3. Remove the nozzle holders and the glow plug.
  4.  
  5. Remove the rocker shaft retaining bolts.
  6.  
  7. Remove the rocker arm and shaft assembly. Keep everything in order so the rocker assembly can be installed in the original position.
  8.  
  9. To install, position the rocker arm and shaft assembly so the bracket with the oil hole is at the front of the engine.
  10.  
  11. Install the rocker shaft retaining bolts and tighten them to 90 ft. lbs.
  12.  
  13. Install the nozzle holders and the glow plugs.
  14.  
  15. Install and tighten the injection lines. Tighten the nozzle holder retaining nuts to between 36 ft. lbs.
  16.  
  17. Adjust the valves.
  18.  

 
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