5-30 ENGINE TOP END
Valve Seat Repair
For the instructions on how to use the valve seat cutter
[A], follow the operation manual provided by the tool man-
Special Tools - Valve Seat Cutter Holder,
Valve Seat Cutter Holder Bar: 57001-1128
Valve Seat Cutter, 45° - 35: 57001-1116
Valve Seat Cutter, 32° - 35: 57001-1121
Valve Seat Cutter, 55° - 35: 57001-1247
Valve Seat Cutter, 45° - 40: 57001-1496
Valve Seat Cutter, 32° - 38.5: 57001-1122
Valve Seat Cutter, 55° - 38.5: 57001-1497
If the tool manufacturer's instructions are not available,
operate in accordance with the following procedure.
Seat Cutter Operation Care
1. This valve seat cutter is developed to grind the valve for
repair. Therefore the cutter must not be used for other
purposes than seat repair.
2. Do not drop or shock the valve seat cutter, or the dia-
mond particles may fall off.
3. Do not fail to apply engine oil to the valve seat cutter
before grinding the seat surface. Also wash off ground
particles sticking to the cutter with washing oil.
Do not use a wire brush to remove the metal par-
ticles from the cutter. It will take off the diamond
4. Setting the valve seat cutter holder in position, operate
the cutter in one hand. Do not apply too much force to
the diamond portion.
Prior to grinding, apply engine oil to the cutter and dur-
ing the operation, wash off any ground particles sticking
to the cutter with washing oil.
5. After use, wash it with washing oil and apply thin layer
of engine oil before storing.
Marks Stamped on the Cutter
The marks stamped on the back of the cutter [A] represent
60° ........................... Cutter Angle [B]
....................... Cutter Outer Diameter [C]
5.5 [B]: 57001