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SEM938C SEM008A 2. If it exceeds the limit, check valve to valve guide clearance. a. Measure valve stem diameter and valve guide inner diameter. b. Check that clearance is within specification. Valve to valve guide clearance: Unit: mm (in) Standard Limit Intake 0.029 - 0.052 (0.0011 - 0.0020) 0.086 (0.0034) Exhaust 0.035 - 0.051 (0.0014 - 0.0020) 0.092 (0.0036) c. If it exceeds the limit, replace valve or valve guide. VALVE GUIDE REPLACEMENT 1. To remove valve guide, heat cylinder head to 110 to 130°C SEM931C 2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 SEM932C 3. Ream cylinder head valve guide hole. Valve guide hole diameter Intake 11.175 - 11.196 mm (0.4400 - 0.4408 in) Exhaust 12.175 - 12.196 mm (0.4793 - 0.4802 in) SEM933C 4. Heat cylinder head to 110 to 130°C (230 to 266°F) and press Projection “L”: 17.15 - 17.35 mm (0.6725 - 0.6831 in) GI MA LC EC FE AT PD FA RA BR ST RS BT HA EL IDX CYLINDER HEAD Inspection (Cont’d) EM-37 |