Withdrawal
1. Remove covers (caps) valve mechanism (see section 4) and intake manifold (see section 5).
2. Starting from the V-ribbed belt side, unscrew the nuts securing the rocker arms one by one and disconnect the rocker arms, nuts and rocker arms (see illustration). Place a set of parts for each rocker arm separately in the labeled plastic bags to avoid mixing them up when installing the assembly.
6.2. Loosen the valve rocker nuts (shown by arrows)
Note. If you only need to remove the rods, loosen the rocker nuts and rotate the rocker arms to make room for the rods to be removed.
3. After removing the rods, store them separately so as not to mix up during installation (see illustration).
6.3. A perforated cardboard box can be used to store the valve stems; this will ensure that they are installed correctly. The inscription on the box indicates the direction to the gearbox
Note. When assembling the assembly, it should be borne in mind that the intake and exhaust manifold rods have different lengths.
Examination
4. Check each rocker arm for signs of wear, cracks, or other damage, especially where rocker arms and valve stems meet.
5. Check up in all valve rocker arms a condition of sockets of hinges and a surface of racks. Look for signs of abrasion, cracks in stress areas, and unusual wear patterns. If the rocker arms are worn or damaged, replace them with new ones; install new racks at the same time.
6. Make sure that the holes in all rocker arms on the side of the installation of the rods are not clogged.
7. Check the rods for cracks and heavy wear. Roll each rod across the glass to see if it's bent.
Installation
8. Coat the lower ends of the valve stems with a coat of engine oil or molybdenum sulfide grease and install them in place. Make sure that each of them is fully seated in the pusher socket.
9. Coat the ends of the valve stems and the top ends of the valve stems with a coat of molybdenum-based lubricant.
10. Apply a coat of molybdenum-based grease to the struts before engine operating pressure is established to prevent damage to mating surfaces. Reinstall the rocker arms, struts and, after screwing on the nuts, tighten them as follows: with the N1 piston at TDC, tighten the intake valve adjusting nuts an additional 1-1/2 turns after reaching the zero clearance point in the valve mechanism for cylinders 1, 5 and 6. Do the same with the exhaust valves for cylinders 1, 2 and 3. After tightening the nuts, make sure the rods are properly seated in the rocker arms. Then set the No. 4 piston to TDC and turn the inlet valve adjusting nuts 1-1/2 turns past the zero clearance point for cylinders 2, 3, and 4, and do the same for the exhaust valves for cylinders 4, 5, and 6..
Note. The zero clearance point is reached when the stem stops turning easily with the rocker arm nut tightened.
11. Install the valve covers and intake manifold.