REMOVAL and INSTALLATION
See Figure 1
- Remove the cylinder head from the engine.
- Remove the camshaft and, as required, the rocker arm assemblies.
- On engines equipped with hydraulic lash adjusters, remove the adjusters and place in order of removal.
- Using a spring compressor, compress the valve springs and remove the locks from the retainers.
- Remove the retainers and springs from the cylinder head.
- Install the springs and retainers on the cylinder head one cylinder at a time.
Position the valve spring with the small pitch end facing the cylinder head.
- Using a spring compressor, compress the valve springs and install the locks in the retainers.
- 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.
- On engines equipped with hydraulic lash adjusters, lubricate and install the adjusters in their original positions.
- Install the camshaft and, as required, the rocker arm assemblies.
- Adjust valve lash as necessary.
See Figures 2, 3 and 4
- With the valve spring removed from the cylinder head, measure the free length. Minimum free length is 1.5551 in. (39.5mm).
- Using a valve spring tester, measure the spring tension at the specified height. Minimum tension is 36.6 lbs.. at 1.28 in.
- Using a square, check valve spring squareness. Measure the clearance at the top if the spring. Maximum clearance is 0.079 in. (2.0mm).
- 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.