Valve and Seat Refacing Measurements

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: After grinding valves or valve seats, check valve clearance.

Check the valve head and seat.
- Check valve angles.
- Check margin width.
- Refer to the appropriate engine article for the procedure.
- Be sure margin width is within specification.
  
  Fig 1: Identifying Valve Margin Width
  Courtesy of FORD MOTOR CO.
Inspect for abnormalities on the valve face and seat. Install a new cylinder head assembly if abnormalities are found.