Valve - Stem Diameter

Measure the diameter of each intake and exhaust valve stem at the points shown. Verify the diameter is within specification.
- Refer to ENGINE 4.6L 2V or ENGINE 4.6L 4V .
- If out of specification, install new components as necessary. Refer to ENGINE 4.6L 2V or ENGINE 4.6L 4V .
  
  Fig 1: Measuring Diameter Of Each Intake And Exhaust Valve Stem
  Courtesy of FORD MOTOR CO.