Cylinder Head Valve Seat Insert - Replacement (2-04) Section 2 - Cylinder Head - Group 02 M11 Page 2-22 Measure the valve guide inside diameter. New Valve Guide I.D. (Installed) mm in 9.670 MIN 0.3807 9.695 MAX 0.3817 If the valve guide is not within the specifications given, the valve guide must be replaced. Cylinder Head Valve Seat Insert - Replacement (2-04) Disassembly Use slide hammer assembly, Part No. 3376617, and valve seat extractor, Part No. 3376146, to remove the valve seat inserts from the cylinder head. Use a wire brush and solvent to clean the deposits from the valve seat insert bores. Use solvent to clean the cylinder head. Dry with com- pressed air.
Inspection Visually inspect the insert bore for cracks or damage. If cracks or damage is found, it is possible to repair the cylinder head by machining the insert bore for oversize valve seat inserts. Refer to the Alternative Repair Manual, Bulletin No. 3810310.