Section 2 - Cylinder Head - Group 02 Cylinder Head - Valve Grinding (2-06) M11 Page 2-25 Cylinder Head - Valve Grinding (2-06) Use Scotch-Brite W 7448, Part No. 3823258 or equivalent, to clean the valve stems. Clean the carbon deposits from the valve face and head. NOTE: The valves must be clean and free of carbon de- posits before they are ground. Valves can be cleaned by the bead blasting method in the head area only . Use valve facing machine, Part No. 3376256, to grind the face of the valve. Follow the instructions supplied with valve facing ma- chine for the correct setup before grinding the valves. Grind the intake and exhaust valves to the angle shown.
Use solvent to clean the metal particles from the valve. Dry with compressed air. Inspection Place the valve on a flat surface and measure the head thickness (1) at the outside diameter. Valve Head Thickness (at O.D.) mm in 3.15 MIN 0.124 3.62 MAX 0.143 If the valve head is worn thinner than minimum specified, the valve(s) must be replaced.