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4.26. Pistons and rods - installation and check of a lubricant gap of the bearing

1. Before installation of pistons and rods clear cylinders and establish a bent shaft into place.
2. Uncover the first rod.
Check of a lubricant gap of bearings of rods
3. Clear a new insert and establish it on a rod. Do not grease an insert yet.
4. Clear the second insert and establish it in a cover.

25.5 Turn piston rings as it is shown in the drawing, before installation of pistons and rods in the engine

1. Gap of the first compression ring
2. Gap of the top oil scraper ring
3. Gap of the second compression ring and broad ring
4. To a pulley of a bent shaft
5. Gap of the lower oil scraper ring



5. Turn piston rings so that their gaps settled down at an angle in 90 ° to each other (25.5).
6. Put on pieces of a rubber hose rod bolts.
7. Oil pistons and rings pure engine and install the compressor of piston rings on the piston.
8. Turn a bent shaft so that the neck of the first cylinder was in the lower dead point, and grease cylinder walls.

25.9 The mark in a head of the piston has to be turned towards a gas-distributing belt


9. Check that the mark from above of the cylinder (25.9) was turned towards a gas-distributing belt, and install the piston and a rod in the cylinder so that the compressor of piston rings concerned the surface of the block of cylinders.
10.  Check that the compressor of rings densely adjoined to the surface of the block of cylinders.

25.11 The piston can be lowered deep into the cylinder by means of the wooden handle


11. Tapping on the piston with the handle of the hammer (25.11), lower the piston deep into of the cylinder and establish a rod
on a neck of a bent shaft.
12. Before final installation of a cover of a rod it is necessary to check a lubricant gap of the bearing.

25.13 Put strips of a film of Plastigodzh on each of conrod necks, parallel to an axis of a bent shaft


13. Cut off a piece of a film of Plastigodzh slightly well, than width of the conrod bearing and put it on a conrod neck, parallel to an axis of a bent shaft (25.13).

25.14 Combine the figures specifying number of the cylinder, and ledges on an insert at installation of covers of rods
1. Cylinder N
2. Ledges and flutes


14.  Clear a surface of an insert of a cover and establish a cover on a rod (25.14).
15. Establish nuts and tighten them till the required inhaling moment in three stages.
16. Turn off nuts, and accurately uncover.

25.17 Measure width of a film of Plastigodzh for determination of size of a lubricant gap of the bearing


17. Compare width of the crushed film to the special scale which is applied to a film for check of size of a lubricant gap (25.17).
18. If the size of a gap differs from the required value, establish  inserts of other  size. Check that between inserts and a rod or a cover there was no dirt or oil. If crushed
the film width since one end probably a neck of a bent shaft gained conical shape.
Final installation of rods
19. Remove traces of a film of Plastigodzh.
20. Check that a surface of inserts, rods and covers were ideally pure, then grease inserts with an even layer of molybdenic lubricant.
21. Establish a rod on a neck, establish a cover and tighten fixing nuts till the required inhaling moment in three stages.
22. Similarly install the remained pistons and rods.
23. After all pistons and rods are installed, turn a bent shaft several hand and check that nothing interfered it with rotation.
24. Check an axial side play of rods.