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Valve - Seat Width

  1. Measure the valve seat width. If necessary, grind the valve seat to specification.
    • Measure the intake valve seat width.
    • Measure the exhaust valve seat width.
    • Recheck the valve spring installed length after the seats have been ground, and shim the valve springs as necessary to achieve the correct installed spring length.
    • Refer to ENGINE - 3.9L & 4.2L for the procedure.
    Fig 1: Measuring Valve Seat Width
    G03243778Courtesy of FORD MOTOR CO.
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