GM Storm/Spectrum 1985-1993 Repair Guide

Valve Lifters

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REMOVAL & INSTALLATION



See Figure 1

The Storm 1.6L and 1.8L DOHC engines are the only engines using hydraulic valve lifters (adjusters). The SOHC engines that are being used in these vehicles utilize valve trains in which the camshaft directly actuates the rocker arms. Refer to Engine Performance and Tune-up of this guide for lash adjustment.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the camshaft assemblies.
  4.  
  5. Remove the selective shims and valve lifters (adjusters).
  6.  

When removing selective shims and lifters, be sure to arrange them in order of removal to ensure proper installation. Measure the valve lifter (adjuster) outside diameter using a micrometer. If the diameter is less than 1.2l8 in. (31 mm), replace the lifter.

  1. Install the selective shims and valve lifters (adjusters).
  2.  
  3. Install the camshaft assemblies. Adjust the valve lash.
  4.  
  5. Connect the negative battery cable.
  6.  



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Fig. Fig. 1: Checking valve lifter (adjuster) outer diameter

OVERHAUL



See Figures 2, 3 and 4

  1. Remove the lifters from the engine and check the outer diameter to determine if they may be reused.
  2.  
  3. Check for air contamination in the lifter oil by attempting to compress the lifter plunger by hand. If the plunger compresses without resistance, the oil must be bled of air; continue with the procedure. If there is resistance, the lifter may be reused.
  4.  
  5. Remove the plunger by gently tapping the lifter against a clean surface such as a small wooden plank.
  6.  
  7. Immerse the lifter in clean, light oil to allow free movement of the inner plunger. Use a wire brush to compress the check ball until the inner plunger stops moving. Refer to Fig. 76.
  8.  
  9. With the lifter immersed in the oil, turn it so the oil hole is facing upward, then install the plunger to the assembly. Refer to the appropriate illustration.
  10.  
  11. Remove the lifter from the oil and attempt to compress the plunger. If no resistance is felt repeat Steps 3-6.
  12.  
  13. Install the lifters to the bores from which they were originally removed.
  14.  



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Fig. Fig. 2: Remove the plunger from the lifter by gently tapping the assembly on a clean surface



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Fig. Fig. 3: While submersed in a clean, light oil, compress the lifter check ball until the plunger stops moving



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Fig. Fig. 4: With the lifter immersed in the oil and with the oil hole facing upward, install the plunger to the lifter

 
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