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Valve Seat Unit: mm (in) SEM374G SEM373G SEM375G Standard Service Cylinder head seat recess diameter Intake 33.000 - 33.015 (1.2992 - 1.2998) 33.500 - 33.515 (1.3189 - 1.3195) Exhaust 31.495 - 31.510 (1.2400 - 1.2405) 31.995 - 32.010 (1.2596 - 1.2602) Valve seat interference fit Intake 0.050 - 0.078 (0.0020 - 0.0031) Exhaust 0.040 - 0.066 (0.0016 - 0.0026) SERVICE DATA AND SPECIFICATIONS (SDS) ZD EM-87 |