GM Full Size Vans 1987-1997 Repair Guide

Lifters

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REMOVAL & INSTALLATION



See Figures 1 through 7

4.3L, 5.0L, 5.7L and 7.4L Engines


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Fig. Fig. 1: Remove the bolts from the lifter retainers (if equipped) ...



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Fig. Fig. 2: ... then remove the lifter retainer from the lifter valley



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Fig. Fig. 3: Remove the restrictor for the lifter(s) you are servicing ...



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Fig. Fig. 4: ... then grasp and remove the lifter from the bore

  1. Remove the cylinder head cover.
  2.  
  3. Remove the intake manifold.
  4.  
  5. Back off the rocker arm adjusting nuts and remove the pushrods. Keep them in order for installation.
  6.  
  7. Remove the lifter retainer bolts, retainer and restrictor.
  8.  
  9. Remove the lifters. If your are going to re-use the lifters, remove them one at a time and mark each one for installation. They must be re-installed in the same locations. If a lifter is stuck, it can be removed with a grasping-type lifter tool, available from most auto parts stores.
  10.  
  11. Inspect each lifter thoroughly. If any of them shows any signs of wear, heat bluing or damage, replace the whole set.
  12.  
  13. Coat each lifter with engine oil supplement prior to installation. Tighten the retainer bolts to 12 ft. lbs. (16 Nm). Adjust the valves as described in the valve lash procedure.
  14.  



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Fig. Fig. 5: A magnet is helpful to pull a well oiled lifter from the bore ...



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Fig. Fig. 6: ... but a slide hammer type removal tool must be used if the lifter is stuck

6.2L and 6.5L Diesel Engines


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Fig. Fig. 7: Diesel engine valve lifter

  1. Remove the cylinder head cover.
  2.  
  3. Remove the rocker arm shaft, rocker arms and pushrods. Keep all parts in order and properly identified for installation.
  4.  
  5. Remove the clamps and lifter guide plates.
  6.  
  7. Remove the lifters by reaching through the access holes in the cylinder head with a magnetic lifter tool. If you are going to re-use the lifters, remove them one at a time and mark each one for installation. They must be re-installed in the same locations. If a lifter is stuck, it can be removed with a grasping-type lifter tool, available form most auto parts stores.
  8.  

To install:
  1. Inspect each lifter thoroughly. If any of them shows any signs of wear, heat bluing or damage, replace the whole set.
  2.  

Some engines will have both standard and 0.010 in. (.0039mm) oversize lifters. The oversized lifters will have "10" etched into the side. The block will be stamped "OS" on the cast pad next to the lifter bore. and on the top rail of the crankcase above the lifter bore.


WARNING
New lifters must be primed before installation. Damage to the lifters and engine will result if new lifters are installed dry!

  1. Prime new lifters by immersing them in clean kerosene or diesel fuel and working the lifter plunger while the unit is submerged.
  2.  
  3. Prior to installation, coat the lifter roller with engine oil supplement. Re-used lifters must be installed in their original positions!
  4.  
  5. Install the lifters.
  6.  
  7. Install the guide plates and clamps. Tighten the clamp bolts to 18 ft. lbs. (26 Nm).
  8.  
  9. After all the clamps are installed, turn the crankshaft by hand, 2 full turns (720°) to ensure free movement of the lifters in the guide plates. If the crankshaft won't turn, one or more lifters may be jamming in the guide plates.
  10.  
  11. The remainder of assembly the reverse of disassembly.
  12.  

 
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