BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

+ 1. The maintenance instruction
+ 2. Maintenance service
- 3. The engine
   - 3.1.2. Specifications
      3.1.3. Kinds of the repair work which is carried out without dismantle of the engine
      3.1.4. An order of installation of the piston of 1st cylinder in ВМТ a compression step
      3.1.5. A cover of a head of cylinders
      3.1.6. A soaking up collector
      3.1.7. A final collector
      3.1.8. Covers of a chain of a drive of a cam-shaft (engine M10)
      3.1.9. A chain and asterisks (engine M10)
      3.1.10. Covers of a gear belt (engines M20 and М40)
      3.1.11. A gear belt and cam-shaft asterisks (engines M20 and М40)
      3.1.12. Forward epiploons
      3.1.13. A head of cylinders
      3.1.14. The pallet
      3.1.15. The oil pump
      3.1.16. A flywheel (a leading disk)
      3.1.17. A back epiploon коленвала
      3.1.18. Engine mount details
   + 3.2. Dismantle and engine major repairs
   + 3.3. An engine electric equipment
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. A running gear
+ 12. A body
+ 13. An electric equipment
+ 14. A good advice

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

The prevention

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

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


1. Translate the check point lever in neutral position. 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 position of a high-voltage wire of a candle of 1st cylinder. If this conclusion is not numbered, define it on a wire from a spark plug.
3. Put a label opposite to a conclusion of a wire of 1st cylinder.
4. Uncover the ignition distributor.
5. Turn коленвал 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 engine M40 turn коленвал so that position бегунка the distributor corresponded ВМТ a compression step in 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 бегунок specifies in a label put on the case of the distributor the piston of 1st cylinder is in ВМТ a compression step. Otherwise tighten коленвал on one complete revolution clockwise (360 ) and establish the piston of 1st cylinder in ВМТ a compression step. If it is impossible to combine simultaneously labels on a pulley and on the index бегунка it specifies in loss of teeths of a gear wheel or a belt, or on wrong installation of a chain or a belt.
7. Now it is possible to expose in ВМТ a step of compression and other pistons, having put labels opposite to other conclusions to the distributor case according to an operating procedure of cylinders and turning коленвал.