Valve Spring Strength

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

Special Tool(s)

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 ENGINE - 3.9L & 4.2L for the procedure.
If out of specification, install new components as necessary. Refer to ENGINE - 3.9L & 4.2L for the procedure.

Fig 2: Checking Valve Spring Strength

Courtesy of FORD MOTOR CO.