BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

+ 1. The maintenance instruction
+ 2. Maintenance service
- 3. The engine
   + 3.1.2. Specifications
   - 3.2. Dismantle and engine major repairs
      3.2.2. Specifications
      3.2.3. Major repairs – the general instructions
      3.2.4. Compression check in engine cylinders
      3.2.5. Major repairs – broad-brush observations
      3.2.6. Diagnostics of the engine with the help вакууметра
      3.2.7. Major repairs – alternatives
      3.2.8. Dismantle of the power unit
      3.2.9. Removal and engine installation
      3.2.10. An order of dismantling of the engine
      3.2.11. Dismantling of a head of the block of cylinders
      3.2.12. Clearing and check of a head of cylinders and details клапанного the mechanism
      3.2.13. Repair of valves
      3.2.14. Assemblage of a head of the block of cylinders
      3.2.15. Removal of pistons and rods
      3.2.16. Dismantle коленвала
      3.2.17. An intermediate shaft (only engine M20)
      3.2.18. Clearing of the block of cylinders
      3.2.19. Check of a condition of the block of cylinders
      3.2.20. Хоннингование cylinders
      3.2.21. Check of a condition of pistons and rods
      3.2.22. Condition check коленвала
      3.2.23. Check radical and шатунных bearings
      3.2.24. An engine assembly order
      3.2.25. Installation of piston rings
      3.2.26. Installation of an intermediate shaft
      3.2.27. Installation коленвала and check of backlashes in radical bearings
      3.2.28. Installation of a back epiploon
      3.2.29. Installation of rods and pistons, check of backlashes in шатунных bearings
      3.2.30. Start-up of the engine after repair and обкатка
   + 3.3. An engine electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. A running gear
+ 12. A body
+ 13. An electric equipment
+ 14. A good advice

3.2.27. Installation коленвала and check of backlashes in radical bearings
1. Arrange the block so that the bottom part has been turned upwards. Turn out bolts of covers, get covers and spread out them as their installation. Get from covers and the block of cylinders old loose leaves and absolutely wipe covers and beds in the block of cylinders.
2. Clear an external surface of new radical loose leaves with oil flutes and cautiously enclose them in bed of the block of cylinders. Corresponding reciprocal loose leaves enclose in covers, having combined ledges with samples. Loose leaves not to grease. Track that lubricant apertures in the block of cylinders and in loose leaves have coincided.

3. The loose leaf with фланцевыми end faces (fillets) keeps within cover N3 on engine M10, in cover N6 on engine M20 and in cover N4 on engine M40.
4. Establish коленвал and measure backlashes in radical loose leaves. For this purpose put on a piece калибровочной a wire on each radical neck коленвала in parallel its axis. Clear surfaces of loose leaves in covers, establish covers and tighten bolts, being guided by the order specified in Specifications (subsection 3.2.2), since the central covers see and being displaced to periphery.

5. Turn away bolts and cautiously lift covers, compare a thickness of each of crushed проволок to a scale on packing and define backlash size. Rotation коленвала at measurements is not supposed.
6. If the backlash does not correspond to norm wrong selection of dimensional group of loose leaves can be the reason. Be convinced that at measurements between bearings and surfaces of covers there were no pollution or oil. If the width of the crushed wire on the ends strongly differs, the radical neck коленвала has конусность.
7. Remove from necks the rests of a wire and remove коленвал.
8. Grease молибденовой with greasing radical loose leaves and a face surface of the persistent radical bearing.
9. Be convinced of cleanliness of necks коленвала, then establish it in the block of cylinders. Clear surfaces of loose leaves in covers and put on each of them a thin layer of greasing.
10. Establish covers on the former places so that arrows have been turned towards a forward part of the engine.
11. Wrap bolts of covers of radical bearings.
12. Tighten bolts of all covers (except a cover of the persistent radical bearing on engines M10 and М20, on engine M40 tighten all bolts), being guided by the order specified in Specifications (subsection 3.2.2 see). Begin an inhaling with the central covers, being displaced to periphery.
13. On engines M10 and М20 tighten bolts of a cover of the persistent radical bearing with the set moment.
14. On cars from a manual transmission replace directing bearing коленвала.
15. Check up rotation freedom коленвала
16. Check up axial люфт коленвала (subsection 3.2.22 see). Люфт should correspond to norm if new bearings and persistent surfaces коленвала are established are not worn out.
17. Establish a new back epiploon.