Removal of pistons / rods. BMW the 5th E28/E34 series (from 1981 to 1993 of release)
Repair of BMW E28 and series E34 from 1981 to 1993
1. Cars of the BMW brand of 5-series
2. Engine
2.1. The repair work which is carried out without extraction of the engine from the car
2.2. Procedures of major maintenance of components of the engine
2.2.1. General information
2.2.2. General information about major maintenance of the engine
2.2.3. Check of extent of compression
2.2.4. Ways of removal of the engine and precautionary measure
2.2.5. Removal and engine installation
2.2.6. Options of major maintenance of the engine
2.2.7. An order of dismantling of the engine at major maintenance
2.2.8. Dismantling of a head of cylinders
2.2.9. Cleaning and check of a condition of a head of cylinders and components
2.2.10. Service of valves
2.2.11. Assembly of a head of cylinders
2.2.12. Removal of pistons / rods
2.2.13. Removal of a cranked shaft
2.2.14. Removal and check of a condition of an intermediate shaft
2.2.15. Cleaning of the block of cylinders
2.2.16. Check of a condition of the block of cylinders
2.2.17. Honingovaniye of cylinders
2.2.18. Check of a condition of pistons / rods
2.2.19. Check of a condition of a cranked shaft
2.2.20. Check of a condition of radical and shatunny bearings
2.2.21. Engine balance of assembly at major maintenance
2.2.22. Installation of piston rings
2.2.23. Installation of an intermediate shaft
2.2.24. Installation of a cranked shaft and check of lubricant gaps of radical bearings
2.2.25. Installation of a back epiploon of a cranked shaft
2.2.26. Installation of pistons / rods in collecting and check of lubricant gaps in bearings of rods
2.2.27. Start and an engine running in after major maintenance
2.2.28. Diagnostics of malfunctions of the engine
3. Cooling system
4. Power supply system
5. Ignition system
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual box of gear shifting (RKPP) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and air conditioner
16. System of onboard electric equipment
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and operation receptions
21. System of onboard diagnostics - a principle of functioning and codes of malfunctions
 








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2.2.12. Removal of pistons / rods

 PERFORMANCE ORDER

  1. Before removal of pistons/rods assembled remove a head of cylinders and the pallet. On engines M10, М20 and М30 remove the oil pump. Address to appropriate sections of the Part the Repair work which is carried out without extraction of the engine from the car).
  1. Check a nail ledge existence in the top point of movement of a piston ring (approximately, at distance of 6 mm from top of each cylinder). If because of carbonaceous osazhdeniye or wear of the cylinder ledges were formed, it is necessary to remove them by means of the tool called by a vertical drill. Make it before removal of pistons. Follow the instruction on application of the manufacturer of this tool. If before installation of pistons/rods not to remove these ledges, it can lead to breakage of a piston ring.
  1. After removal of ledges in cylinders overturn the engine cranked shaft up.
  2. Before removal of rods check щупами lateral люфт. Insert щупы between the first rod and a crank cheek that люфт disappeared. Lateral люфт corresponds to thickness щупа (щупов). If lateral люфт exceeds an admissible limit, new rods be required. At installation of new rods (or a new cranked shaft) be convinced that some lateral люфт takes place, if is not present, it is necessary to subject rods to machining - if necessary address for consultation in a workshop). Repeat operation for other rods.
  1. Check identification labels of rods and covers. If they are not marked, with a small center punch on each rod and a cover put corresponding to cylinder number number of labels (1, 2, 3 and so on).
  1. In turn on a half of turn to weaken nuts/bolts of covers of each rod while they will not begin to turn away a hand. Uncover also the loose leaf of the bearing of a rod No. 1. Do not drop the loose leaf from a cover.
  1. If for fastening of covers hairpins, are applied to protection of a neck of a cranked shaft and a cylinder wall at piston extraction, put on hairpins short rubber or plastic tubes.
  1. Remove the loose leaf of the bearing and вытолкните a piston/rod assembled outside at the top the cylinder. Press a surface of the top bearing of a rod the wooden handle of a hammer. If resistance is felt, once again check that all ledge is removed from the cylinder.
  2. Repeat procedure for other cylinders.
  3. After removal make installation of covers of rods and loose leaves of bearings in the corresponding rods and turn a hand of bolts/nut of covers. Saving of former loose leaves of bearings on their places before assembly will help to protect surfaces of bearings of rods from emergence of casual agnails and dents.
  4. Do not separate pistons from rods (look the Section Check of a condition of pistons/rods).


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2.2.11. Assembly of a head of cylinders
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2.2.13. Removal of a cranked shaft