E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   - 3.1.2. Specifications
      3.1.3. Types of the repair work which is carried out without dismantle of the engine
      3.1.4. An order of installation of the piston of the 1st cylinder in VMT of a step of compression
      3.1.5. Cover of a head of cylinders
      3.1.6. A soaking-up collector
      3.1.7. Final collector
      3.1.8. Covers of a chain of a drive of a cam-shaft (M10 engine)
      3.1.9. Chain and asterisks (M10 engine)
      3.1.10. Covers of a gear belt (engines M20 and М40)
      3.1.11. Gear belt and cam-shaft asterisks (engines M20 and М40)
      3.1.12. Forward epiploons
      3.1.13. Head of cylinders
      3.1.14. Pallet
      3.1.15. Oil pump
      3.1.16. Flywheel (a leading disk)
      3.1.17. Back epiploon of the crankshaft
      3.1.18. Engine mount details
   + 3.2. Dismantle and major maintenance of the engine
   + 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


3.1.4. An order of installation of the piston of the 1st cylinder in VMT of a step of compression



At the description of procedure it is supposed that the distributor of ignition is established correctly. If it is necessary to expose the distributor, determine a compression step by a compression in the cylinder, and combine labels of the moment of ignition. the 1st cylinder is located about a radiator

Piston installation (or pistons) in VMT of a step of compression is an integral part of many procedures on engine adjustment.


1. Transfer the check point lever to neutral situation. Disconnect a high-voltage wire of the coil of ignition from the central conclusion of a cover of the distributor and connect to weight on the block of cylinders.
2. Uncover the distributor and find on a cover the provision of a high-voltage wire of a candle of the 1st cylinder. If this conclusion is not numbered, determine it by a wire from a spark plug.
3. Put a label opposite to a conclusion of a wire of the 1st cylinder.
4. Uncover the ignition distributor.
5. Turn the crankshaft a key (for a head of a bolt of a pulley) or a starter so that the mark in a pulley was combined with a label on a plate in a forward part of the engine. On the M40 engine turn the crankshaft so that situation a begunka of the distributor corresponded to VMT of a step of compression in the 1st cylinder, then tighten before dredging coincidence on a flywheel with a label on the block of cylinders, observing through a window in the block.
6. If the begunok indicates a label put on the case of the distributor, the piston of the 1st cylinder is in VMT of a step of compression. Otherwise tighten the crankshaft on one complete revolution clockwise (360 °) and establish the piston of the 1st cylinder in VMT of a step of compression. If it is impossible to combine at the same time labels on a pulley and on the index a begunka, it indicates loss of teeths of a gear wheel or a belt, or on the wrong installation of a chain or a belt.
7. Now it is possible to expose in VMT of a step of compression and other pistons, having put labels opposite to other conclusions on the distributor case according to an operating procedure of cylinders and turning the crankshaft.