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Valve And Seat Refacing Measurements

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. 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.
  1. Check the valve head and seat.
    • Check valve angles.
    • Check margin width.
    • Refer to ENGINE - 3.9L & 4.2L for the procedure.
    • Be sure margin width is within specification.
    Fig 1: Checking Valve Head And Seat
    G03243777Courtesy of FORD MOTOR CO.
  2. Inspect for abnormalities on the valve face and seat.
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