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3. Ream cylinder head valve guide bore. Reaming bore (service part): 11.185 - 11.196 mm (0.4404 - 0.4408 in) 4. Heat cylinder head to 150 to 160°C (302 to 320°F) and press 5. Ream valve guide. Final size: 7.000 - 7.015 mm (0.2756 - 0.2762 in) VALVE SEATS 1. Check valve and valve seat for contact. 2. Check valve seats for pitting at contact surface. Resurface or When repairing valve seat, check valve and valve guide for VALVE SEAT REPLACEMENT 1. Bore out old seat until it collapses. 2. Ream the cylinder head recess. Reaming bore for service valve seat Intake 41.432 - 41.454 mm (1.6312 - 1.6320 in) Use the valve guide center for reaming to ensure valve seat . SEM245D SEM246DA 10.3 mm SEM722BA SEM795A Recess diameter CYLINDER HEAD CD20T Inspection (Cont’d) EM-143 |