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1B3-134 OM600 ENGINE MECHANICAL Machining Procedure Valve machining is required : - When the valve is leaking. - When replacing the valve. - When replacing the valve guide. - When replacing the valve seat or valve seat ring. 1. Machine the valve seat (a=45°). 2. Measure valve seat width ‘b’. Valve seat width ‘b’ 1.2 - 1.7 mm 1.5 - 2.0 mm Intake Exhaust 3. If the specification is exceeded, the valve seat width has to be corrected at the lower free angle of ‘ β ’=65°. 4. Measure radial runout. Runout Max. 0.03mm |