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General Procedure

Inspect the following valve areas:

  1. The end of the stem for grooves or scoring.
  2. The valve face and the edge for pits, grooves or scores.
  3. The valve head for signs of burning, erosion, warpage and cracking.
  4. The valve margin for wear.
Fig 1: Identifying Valve Face, Head And Margin
G07420899Courtesy of FORD MOTOR CO.
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