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CYLINDER HEAD EM-193 [YD] C D E F G H I J K L M A EM Valve Dimension Check dimensions of each valve. For dimensions, refer to SDS, . When valve head has been worn down to 1 mm (0.039 in) in margin Valve Guide Clearance ● Perform the inspection before removing valve guides. ● Check that the valve stem diameter is within specifications. ● Push valve approximately 25 mm (0.98 in) toward combustion ● Valve guide clearance is 1/2 of movement on dial indicator. ● If the measured value exceeds the limit, replace valve guide. Valve Guide Replacement ● When removing valve guide, replace it with oversized [0.2 mm 1. Heat cylinder head to 110 to 130 ° C (230 to 266 ° F) in oil bath. 2. Using valve guide drift, tap valve guides out from the combus- SEM188A Standard: Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in) Exhaust : 0.040 - 0.073 mm (0.0016 - 0.0029 in) Limit: Intake : 0.08 mm (0.0031 in) Exhaust : 0.10 mm (0.0039 in) PBIC0414E SEM008A SEM931C |