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CYLINDER HEAD ASSEMBLY EMA -49 3) Subtract the valve stem outer diameter measure- Valve stem- to-guide clearance If the clearance is greater than specification, re- 2. Inspect the valves. 1) Check the valve is ground to the correct valve 2) Check that the surface of valve for wear. 3) Check the valve head margin thickness. If the Margin Margin ECKD221A 4) Check the valve length. Length 5) Check the surface of valve stem tip for wear. 3. Inspect the valve seats. 1) Check the valve seat for evidence of overheating 2) Before reconditioning the seat, check the valve 3) Recondition the valve seat with a valve seat 1.2 ~ 1.8 mm 0.8 ~ 1.4 mm Pilot Exhaust Intake Cutter BCGE009B |