E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   + 3.1.2. Specifications
   - 3.2. Dismantle and major maintenance of the engine
      3.2.2. Specifications
      3.2.3. Major maintenance – the general instructions
      3.2.4. Compression check in engine cylinders
      3.2.5. Major maintenance – general comments
      3.2.6. Engine diagnostics by means of the vacuum gage
      3.2.7. Major maintenance – alternatives
      3.2.8. Dismantle of the power unit
      3.2.9. Removal and engine installation
      3.2.10. Order of dismantling of the engine
      3.2.11. Dismantling of a head of the block of cylinders
      3.2.12. Cleaning and check of a head of cylinders and details of the klapanny mechanism
      3.2.13. Repair of valves
      3.2.14. Assembly of a head of the block of cylinders
      3.2.15. Removal of pistons and rods
      3.2.16. Crankshaft dismantle
      3.2.17. Intermediate shaft (only M20 engine)
      3.2.18. Cleaning of the block of cylinders
      3.2.19. Check of a condition of the block of cylinders
      3.2.20. Honningovaniye of cylinders
      3.2.21. Check of a condition of pistons and rods
      3.2.22. Check of a condition of the crankshaft
      3.2.23. Check of radical and shatunny bearings
      3.2.24. Engine assembly order
      3.2.25. Installation of piston rings
      3.2.26. Installation of an intermediate shaft
      3.2.27. Installation of the crankshaft and check of gaps in radical bearings
      3.2.28. Installation of a back epiploon
      3.2.29. Installation of rods and pistons, check of gaps in shatunny bearings
      3.2.30. Engine start-up after repair and a running in
   + 3.3. Engine electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice

3.2.22. Check of a condition of the crankshaft

1. Wash out a cranked shaft solvent and dry the compressed air, clean oil channels, clear necks.
2. Remove with a file agnails.
3. Check a condition of necks of a shaft, existence of cracks, hollows, задиров. Check a roughness of necks, having rubbed about them a copper coin. If there are traces, necks follows перешлифовать.
4. Measure diameter of necks in several places on a circle and on length and define a konusnost and ovality.
5. At appreciable damages or if the konusnost and ovality exceed norm, the crankshaft follows перешлифовать and to replace loose leaves repair.
6. If on crankshaft necks under epiploons the deep flute from a working edge of an epiploon was formed, there are scratches or other damages, the crankshaft is recommended to replace, or проконсультроваться in car-care center where a neck it is possible to chisel and напрессовать the plug. If development from an epiploon deep, even after installation of a new epiploon appears an oil leak.
7. Check a condition of radical and shatunny loose leaves (see subsection 3.2.23).