Valve Spring Strength

Fig 1: Identifying Special Tool(s)

Courtesy of FORD MOTOR CO.

Use a Valve/Clutch Spring Pressure Gauge to check the valve spring for correct strength at the specified valve spring length.
- Refer to the GENERAL SPECIFICATIONS .
- If out of specification, install new components as necessary. Refer to the ENGINE - 3.9L article.
Fig 2: Checking Valve Spring Strength
Courtesy of FORD MOTOR CO.