Tools Required

J 9666 Valve Spring Tester

1. Measure the valve spring tension. Specifications for the valve spring tension are as follows:

•	Valve Closed: 236 N (53 lb) @ 30.3 mm (1.19 in)

•	Valve Open: 485 N (109 lb) @ 20.9 mm (0.823 in)

Important: DO NOT use shims to increase spring load. The use of shims will cause the valve spring to bottom out before the camshaft lobe is at peak lift.

2. If low valve spring load is found, replace the valve springs.