Procedures

INSPECTION

1. Whenever valves have been removed for inspection, reconditioning or replacement, valve springs should be tested for correct tension. Discard the springs that do not meet specifications. The following specifications apply to both intake and exhaust valves springs:
- Valve Closed Nominal Tension-75 lbs. @ 38.0 mm (1.50 in.)
- Valve Open Nominal Tension-134 lbs. @ 29.75 mm (1.17 in.)

2. Inspect each valve spring for squareness with a steel square and surface plate, test springs from both ends. If the spring is more than 1.5 mm (1/16 inch) out of square, install a new spring.