REMOVAL & INSTALLATION
The valve springs are removed and installed as described under the Valve Stem Seal Removal and Installation procedures. Please refer to those procedures.
See Figure 1
- Place the valve spring on a flat surface next to a carpenter's square. Measure the height of the spring, and rotate the spring against the edge of the square to measure distortion. If the spring height varies (by comparison) by more than 1 / 16 in. (1.6mm) or if the distortion exceeds 1 / 16 in. (1.6mm), replace the spring.
- Test the valve springs for correct spring pressure at the installed and compressed (installed height minus valve lift) height using a valve spring tester. Springs should be within one pound, plus or minus, of each other. Replace springs if they do not meet the specifications shown in either the Valve Specification or Engine Rebuilding SPECIFICATION CHARTS.
See Figure 2
After installing the valve spring, measure the distance between the spring mounting pad and the lower edge of the spring retainer. Compare the measurement to the specifications shown in either the Valve Specification or Engine Rebuilding SPECIFICATION CHARTS. If the installed height is not within specification, add shim washers between the spring mounting pad and the spring. Use only washers designed for valve springs.