12.2 A deep groove bushing or special tool is required to install the valve seal
1. Special tool; 2. Compaction; 3. Spring seat
2. Install new seals on the intake valve guide bushings (12.2).
12.3 If enamelled valve springs were installed in the head, install them with the enamelled ends away from the head, as shown in the figure
1. Enameled end of the spring; 2. Plate; 3. Compaction; 4. Spring seat
3. Lubricate and install the first valve. Install the spring seat on the guide sleeve and install the spring and plate (12.3).
12.4 Lubricate the crackers with grease before installation
4. Compress the spring and install the crackers, having previously lubricated them (12.4).
5. Install the remaining valves in the same manner.
12.6 Check the valve spring installation height
6. Check the valve installation height. It is measured from the upper surface of the valve spring seat to the lower surface of the disc (12.6). If the height is too high, install washers under the spring.
12.7 A special tool is used to replace the rarefied mixture intake valve seal
1. MD998308; 2. Compaction; 3. Valve body; 4. MD998308
7. Using tool N MD998308, install the seal onto the rarefaction inlet valve stem (12.7).
8. Lubricate the valve stem and install it in place.
9. Compress the spring using tool N MD998309 and install it together with the plate. Install the crackers.
12.10 When installing the rarefied mixture intake valves, use new sealing rings. Lubricate the rings, threads and seat with engine oil (indicated by arrows)
10. Install a new sealing ring on the valve and lubricate it with engine oil (12.10). Also lubricate the threads and seat.
11. Install the rarefaction inlet valves and tighten them to the specified torque.
12. Lubricate the rocker arms, camshaft and rocker arm shafts with molybdenum grease, then install the camshaft, rocker arms and rocker arm shafts in place.