Note. Sleeves with circlips are available as spare parts. The bushings have an outer diameter increased by 0.2 mm and a reduced valve hole diameter.
1. Press out the defective sleeve from the side of the combustion chamber with a special mandrel.
2. Insert a new bushing into a special mandrel.
3. Press the sleeve from the side of the camshaft using a mandrel until the retaining ring stops in the cylinder head.
4. Ream the hole in the sleeve using a reamer to 8.022-8.040 mm for intake valves and to 8.029-8.047 mm for exhaust. After that, grind the valve seats, centering the tool on the hole in the sleeve.