GM Metro/Sprint 1985-1993 Repair Guide

Valve Springs

Print

REMOVAL and INSTALLATION

See Figure 1



Click image to see an enlarged view

Fig. Fig. 1: Valve spring identification

  1. Remove the cylinder head from the engine.
  2.  
  3. Remove the camshaft and, as required, the rocker arm assemblies.
  4.  
  5. On engines equipped with hydraulic lash adjusters, remove the adjusters and place in order of removal.
  6.  
  7. Using a spring compressor, compress the valve springs and remove the locks from the retainers.
  8.  
  9. Remove the retainers and springs from the cylinder head.
  10.  

To install:
  1. Install the springs and retainers on the cylinder head one cylinder at a time.
  2.  

Position the valve spring with the small pitch end facing the cylinder head.

  1. Using a spring compressor, compress the valve springs and install the locks in the retainers.
  2.  
  3. Once all cylinders are assembled, use a rubber hammer to hit each valve assembly on the retainer side. This will positively seat the locks in the retainer.
  4.  
  5. On engines equipped with hydraulic lash adjusters, lubricate and install the adjusters in their original positions.
  6.  
  7. Install the camshaft and, as required, the rocker arm assemblies.
  8.  
  9. Adjust valve lash as necessary.
  10.  

INSPECTION



See Figures 2, 3 and 4



Click image to see an enlarged view

Fig. Fig. 2: Measuring valve spring free length



Click image to see an enlarged view

Fig. Fig. 3: Measuring valve spring tension at specified height



Click image to see an enlarged view

Fig. Fig. 4: Measuring valve spring squareness

  1. With the valve spring removed from the cylinder head, measure the free length. Minimum free length is 1.5551 in. (39.5mm).
  2.  
  3. Using a valve spring tester, measure the spring tension at the specified height. Minimum tension is 36.6 lbs.. at 1.28 in.
  4.  
  5. Using a square, check valve spring squareness. Measure the clearance at the top if the spring. Maximum clearance is 0.079 in. (2.0mm).
  6.  
  7. If the valve spring does not meet specification, replace it. If two or more springs are out of specification, it is recommended that the entire set be replaced.
  8.  

 
label.common.footer.alt.autozoneLogo