GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Eldorado 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Valve Spring Inspection and Measurement

Tools Required

J 9666 Valve Spring Tester


    Object Number: 4960 Size: SH
  1. Measure the valve spring tension. Specifications for the valve spring tension are as follows:
    2. • Valve Closed: 236 N (53 lb) @ 30.3 mm (1.19 in)
    • Valve Open: 485 N (109 lb) @ 20.9 mm (0.823 in)
  2. If low valve spring load is found, replace the valve springs. 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.