For removal of the valve seat, apply arc welding work to two points of valve Vavle seat insert seat insert, and pull out the valve seat 밸브 시트 인서트 insert with inner extractor. Undercool a new valve seat with dry Cylinder head 실린더 헤드 ice for about 2 hours and press the valve seat insert into position in the (bench press). Apply valve lapping compound to the cylinder head using a special tool Welding bead 용접 비드 EA3M2032 valve head seating face on the valve seat and lap the valve seat by turning it until it is seat- ed in position, then wipe out the lapping compound. 4) Valve spring Visual check Visually check the exterior of the valve springs for damage, and replace if necessary.
Functional check - Measure free length and spring ten- sion with a valve spring tester. (Refer to appendix) 1.0mm or less - Measure the spring inclination with Free length a square. Square - Compare the measured value with the standard value to determine whether to replace or repair. EFM2039I - 64 - INSPECTION AND MEASUREMENT Standard Limit Valve spring nclination DE12T/TI/TIA 1.0 mm 2.0 mm DE12TIS 1.7 mm