Valve Spring Strength

Special Tool(s) 

Pressure Gauge, Valve/Clutch Spring 303-006 (TOOL-6513-DD) or equivalent

1. Use a Valve/Clutch Spring Pressure Gauge to check the valve spring for correct strength at the specified valve spring length.
   • If out of specification, install new components as necessary.
     Fig 1: Measuring Valve Spring Strength

     Courtesy of FORD MOTOR CO.