Check of a condition of the block of cylinders. 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


2.2.16. Check of a condition of the block of cylinders


  1. Before condition check the block should be cleared (look the Section Cleaning of the block of cylinders).
  2. Visually check existence of cracks, a rust and corrosion. Look in carving openings for the broken carvings. Expediently in the mechanical workshop having the special equipment to check the block on existence of the hidden cracks. At detection of defects the block if it is possible, it is necessary to repair; if is not present, it is necessary to get the new block.
  3. Check surfaces of cylinders on an istiraniye and existence of furrows.
  1. Measure diameter in the top part of each cylinder (at once under a ledge zone - And), in average - In and bottom - With parts parallel to an axis of a cranked shaft.
  1. For determination of diameter of the cylinder length of a measuring instrument check a micrometer
  1. Further, measure diameter of the cylinder at the same levels in the direction, perpendicular axes of a cranked shaft. Compare results to requirements of the Size table and adjusting data at the end of the Management.
  1. If precision measuring tools are inaccessible, sizes of gaps between pistons and cylinders, though is not so exact, it is possible to define with the help щупов.
  2. For definition of gaps choose щуп and insert it into the cylinder along the interfaced piston. The piston should be established precisely in normal situation. Shchup should be established between the piston and the cylinder on one of persistent surfaces (on 90 ° in relation to an opening under a finger). The piston should pass on the cylinder) щуп is established) with small effort.
  3. If the piston easily passes down, the gap is great and the new piston is required. If the piston gets stuck in the lower part of the cylinder and moves more freely in the top part, the cylinder has a konusnost. If at piston rotation together with shchupy in the cylinder there are resistance sites, the cylinder has ovality.
  4. Repeat operation for other pistons and cylinders.
  5. If walls of cylinders are used strongly up or have furrows or if they have a konusnost or ovality is higher than limits in the Size table and adjusting data at the end of the Management, the block of cylinders is necessary for grinding and отхонинговать in a mechanical workshop. After polishing pistons and rings of the increased size be required.
  6. If cylinders are in rather good condition and have no the wear which is falling outside the limits admissions and if gaps between cylinders and pistons are maintained in norm, they should not be ground. Everything that is required, this honingovaniye and a new set of rings (look Honingovaniye's Section of cylinders).

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2.2.15. Cleaning of the block of cylinders
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2.2.17. Honingovaniye of cylinders