Specifications

Hold the drive unit in a vertical position, and use an
up-and-down movement of 12.7 mm [0.50-inch] travel and
light pressure to grind the insert.
Remove the grinder unit from the arbor.
Install eccentrimeter gauge (4), Part No. ST-685-4, on the
arbor.
Measure the valve seat to valve guide concentricity.
Concentricity (Per 360 Degrees)
mm in
0.09 MAX 0.0035
NOTE: If the valve seat concentricity does not meet the
specifications, grind the valve seat again. If the specifica-
tions can not be met, replace the valve seat insert. Refer to
Cylinder Head - Replacing the Valve Seat Inserts (02-05).
Install reconditioned valves in their respective bores. Hold
the valve firmly against the valve seat insert.
Use a depth gauge, Part No. 3823495, to measure the
valve protrusion.
Valve Protrusion
mm in
- 0.63 MIN - 0.025
0.00 MAX 0.000
Cylinder Head - Rebuild (02-02) Cylinder Head
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