Valve - Stem Diameter
- Measure the diameter of each intake and exhaust valve stem at the points shown. Verify the diameter is within specification.
- 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.