Valve Stem Diameter

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Measure the diameter of each intake and exhaust valve stem at the points shown. Verify the diameter is within specification.
- Refer to ENGINE - 3.0L (4V) or ENGINE - 3.9L for the procedure.
- If out of specification, install new components as necessary. Refer to ENGINE - 3.0L (4V) or ENGINE - 3.9L for the procedure.
Fig 1: Measuring Diameter Of Intake And Exhaust Valve Stem
Courtesy of FORD MOTOR CO.