BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

+ 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


3.2.9. Removal and installation of the engine


1. Execute actions for a decompression of fuel system (see subsection 6.10) and disconnect the battery from weight.
2. Remove a cowl, air filter and air ducts.
3. Merge liquid and oil from the engine and the check point.

4. Accurately designate and disconnect from the engine all hoses, wires and cables, including kick cables - down - the mode and a cruise control. Muffle fuel hoses.
5. Remove a radiator (except the M40 engine), fan (see subsection 4.6) and a casing.
6. Take off drive belts.
7. Remove the compressor, take aside and fix, without disconnecting from highways.
8. Remove a starter and the generator.
9. Remove the exhaust system (see subsection 7.1.1).
10. On the car from the automatic transmission remove fastening of the hydrotransformer to a drive plate. On the M40 engine turn off from the pallet of the union of tubes of a cooler of transmission liquid.
11. Fix for engine hooks a chain or таль. If hooks are removed, then the chain can be fixed for hairpins of the soaking-up collector, having laid a big washer and having tightened a nut.
12. Choose a weak point in a waist (chain).
13. On M10 and M20 engines remove a back cross-piece and slightly lower a back part of the check point.
14. Turn off bolts of fastening of the check point to the engine.
15. Turn off nuts of fastening of support of the engine to a stretcher. On M40 engines turn off bolts and remove dampers from support.
16. Make sure that all details connecting the engine to a body or transmission are removed. Designate all remained details and remove.
17. Slightly raise the engine and carefully give it forward and bring out of the check point. On the car from the automatic transmission track the hydrotransformer. If the hydrotransformer descends together with the engine, then remove it from the crankshaft, otherwise leave it on transmission. Lift the engine and bring out of a motor compartment.


If the hydrotransformer descends together with the engine, then at assembly replace a forward epiploon of transmission as it can be damaged.

18. Remove a flywheel (drive plate) and a back intensifying plate.


Installation is carried out upside-down. From the automatic transmission before assembly install the hydrotransformer on the car at the check point, and then install on a drive plate. On the car from the manual transmission before assembly grease a sock of a main shaft of the check point with refractory lubricant. Fill the conditioner with coolant and check tightness of highways.