10-8CYLINDER HEAD / VALVESMeasure the valve seat width.STANDARD VALUE : 0.7~0.9 mmSERVICE LIMIT : 1.3 mmVALVE SEAT CUTTERReface the worn valve seat by using valve seat cuttersand grinders.Valve faces cannot be ground. If a valve face is rough,worn unevenly, or contacts the seat improperly, thevalve must be replaced.Follow the refacer manufactuer’s operatinginstructions.Be careful not to grind the seat more than necessary.7020IN : 22mmEX : 22mmIN : 23mmIN : 24.5mmEX : 24.5mm EX : 20mmVALVE SEATS INSPECTION / REFACEClean all intake and exhaust valves thoroughly toremove carbon deposits.Apply a light coating of Prussian Blue to each valveface.Tap the valve against the valve seat serveral times withthe valve guide reamer, without rotating the valve, tocheck for proper valve seat contact.Remove the valve and inspect the valve seat face.The valve seat contact should be within the specifiedwidth and evenly all around the circumference.If the valve seat width is not within specification,reface the valve seat.Lubricate each valve stem with molybdenum greaseand insert the valve into the valve guide turning itslowly to avoid damage the stem seals.Check to see if the valve move up and down smoothly.CYLINDER HEAD ASSEMBLYInstall new stem seals and valve spring seat.
