BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car



BMW E30
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   + 3.1.2. Specifications
   - 3.2. Dismantle and capital repairs of the engine
      3.2.2. Specifications
      3.2.3. Capital repairs – the general instructions
      3.2.4. Check of a compression in engine cylinders
      3.2.5. Capital repairs – general comments
      3.2.6. Diagnostics of the engine by means of the vacuum gage
      3.2.7. Capital repairs – alternatives
      3.2.8. Dismantle of the power unit
      3.2.9. Removal and installation of the engine
      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 valvate 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. Dismantle of the crankshaft
      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 conrod 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 conrod bearings
      3.2.30. Launch of the engine 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. Useful tips




3.2.22. Check of a condition of the crankshaft

PERFORMANCE ORDER
1. Wash out a bent shaft solvent and dry 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, zadir. Check a roughness of necks, having rubbed about them a copper coin. If there are traces, then necks should be pereshlifovat.
4. Measure diameter of necks in several places on a circle and on length and define conicity and ovality.
5. At noticeable damages or if conicity and ovality exceed norm, then the crankshaft should be pereshlifovat and replaced inserts 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, then the crankshaft is recommended to be replaced, or to prokonsultrovatsya in car service where a neck it is possible to chisel and napressovat the plug. If development from an epiploon deep, then even after installation of a new epiploon appears an oil leak.
7. Check a condition of radical and connecting rods (see subsection 3.2.23).