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 SYSTEM & COMPONENT TESTING - GASOLINE for the procedure.
- If out of specification, install new components as necessary. Refer to REMOVAL & INSTALLATION - BLACKWOOD, EXPEDITION, F150 PICKUP & NAVIGATOR - GASOLINE for the procedure.
  
  Fig 1: Inspecting Valve Stem Diameter
  Courtesy of FORD MOTOR CO.