Section 2 - Cylinder Head - Group 02 Cylinder Head Valve Seat Insert - Replacement (2-04) M11 Page 2-23 Measure the valve seat insert bore depth in the cylinder head. Insert Bore Depth (Standard Insert) mm in 9.40 MIN 0.370 9.50 MAX 0.374 If the valve seat insert bore depth does not meet the specifications given, refer to Cylinder Head Oversize Valve Seat Insert - Installation (2-05). Measure the inside diameter of the valve seat insert bore in the cylinder head. Insert Bore I.D.
(Standard Insert) mm in 45.920 MIN 1.8073 45.935 MAX 1.8085 If the valve seat insert bore inside diameter does not meet the specifications given, refer to Cylinder Head Oversize Valve Seat Insert - Installation (2-05) Assembly Install the base and swivel of valve seat insert tool, Part No. ST-257, on the cylinder head to guide the valve seat driver. Install valve guide arbor, Part No.ST-804-1. NOTE: The insert chamfer (1) must be installed toward the bottom of the counterbore. Use valve seat driver, Part No. 3376105, to drive the valve seat insert into the counterbore. Make sure the insert is at the bottom of the counterbore. Use valve seat grinding machine, Part No.
ST-685, and valve guide arbor set, Part No. 804, to grind the new valve seat inserts. Refer to Valve Seats - Grinding in Procedure (2-02).