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VALVE SEAT INSPECTION/REPAIR

A6E242410102E01

1. Measure the seat contact width.

  • If necessary, resurface the valve seat using a 45° valve seat cutter and/or resurface the valve face.

  Standard width:
  1.2-1.6 mm {0.048-0.062 in}

2. Verify that the valve seating position is at the center of the valve face.

  (1) If the seating position is too out side, correct the valve seat using a 70° (IN) or 65° (EX) cutter, and a 45° cutter.
  (2) If the seating position is too inner side, correct the valve seat using a 30° (IN) cutter, and a 0° (EX) cutter, and a 45° cutter.

3. Inspect the sinking of the valve seat. Measure the protruding length (dimension L) of the valve stem.

  • If not specified, replace the cylinder head.

  Standard dimension L:
  IN: 40.64-42.24 mm {1.600-1.662 in}
  EX: 40.50-42.10 mm {1.595-1.657 in}