4 - 22ENGCAMSHAFT, ROCKER ARMS AND VALVES3.Check: Valve facePitting/wear → Grind the face. Valve stem endMushroom shape or diameter larger than thebody of the stem → Replace.4.Measure: Margin thickness aOut of specification → Replace.Margin thickness:Intake:1.0 ~ 1.4 mm (0.0394 ~ 0.0551 in)Exhaust:0.8 ~ 1.2 mm (0.0315 ~ 0.0472 in)5.Measure: Runout (valve stem)Out of specification → Replace.NOTE: When installing a new valve, always replacethe guide. When a valve is removed or replaced,always replace the oil seal.6.Eliminate: Carbon deposits(from the valve face and valve seat)7.Check: Valve seatPitting/wear → Reface the valve seat.8.Measure: Valve seat width aOut of specification → Reface the valve seat.Runout limit:0.01 mm (0.0004 in)Valve seat width:Intake:1.2 ~ 1.4 mm (0.0472 ~ 0.0551 in): 1.6 mm (0.0630 in)Exhaust:1.2 ~ 1.4 mm (0.0472 ~ 0.0551 in): 1.6 mm (0.0630 in)
