Valve Spring Strength: Procedure

Use a Valve/Clutch Spring Pressure Gauge to check the valve spring for correct strength at the specified valve spring length.
- For additional information, refer to GENERAL SPECIFICATIONS for Expedition or GENERAL SPECIFICATIONS for Navigator.
- If out of specification, install new components as necessary. For the procedure, refer to ENGINE - 4.6L AND 5.4L (2V) for Expedition or ENGINE 5.4L (4V) for Navigator.
Fig 1: Checking Valve Spring For Correct Strength
Courtesy of FORD MOTOR CO.