Install the base and swivel of valve seat insert tool, Part No. ST-257, on the cylinder head to guide the valve seat
driver.
NOTE: The insert chamfer (1) must be installed toward the bottom of the counterbore.
Use the valve seat driver and an arbor press to push the valve seat insert into the counterbore.
NOTE: Make sure the insert is at the bottom of the counterbores.
Use valve seat grinding machine, Part No. ST-685, and valve guide arbor set, Part No. ST-663, to grind the new
valve seat inserts. Refer to ‘‘Grinding the Valve Seats’’ under Cylinder Head – Rebuild (02-02).
