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

3.1.15. The oil pump


Engines M10 and М20
1. Remove the pallet.
2. On engine M10 turn away 3 bolts of fastening of a conducted gear wheel (or a nut).
3. Turn away bolts.
4. Remove the pump.
5. On engine M20 rotation is transferred to the pump through the intermediate shaft connected with the leading platen of the pump. For access to the platen remove a clamping plate and get заглушку. Take out the leading platen and examine gear wheels. In case of deterioration of a gear wheel of an intermediate shaft or the bearing a shaft replace.
6. For replacement of an intermediate shaft remove the engine, a gear belt and a forward cover.
Engine M40
7. Remove a gear belt, a head of cylinders and натяжитель a belt.
8. Turn away a bolt of a nave of a sock коленвала (subsection 3.1.11 see) and remove an asterisk with a dividing washer (the ledge on a washer should be turned inside).
9. Turn away bolts and get directing and stabilising platens (M40).
10. Get шпонку (M40).
11. Remove the remote plug.
12. Turn away bolts and remove a forward cover with the pump. Pay attention to an arrangement of bolts which have different length.
13. Get a ring from a flute in a sock коленвала. Выпрессуйте an epiploon from the case.

The prevention

At each dismantling of the engine the oil pump is recommended to be changed irrespective of its condition.


Engines M10 and М20
1. Uncover and check up a condition of teeths of gear wheels (rotors) and маслоприемника.
2. Collect the pump, ship in a vessel with oil and check up its work, rotating the platen by hand. The final aperture should leave oil.
Engine M40
3. Unscrew screws.
4. Uncover the pump.
5. Remove an internal gear wheel of the oil pump.
6. Remove наружнюю a gear wheel of the oil pump.
7. Get gear wheels, wash out the pump and collect, without breaking orientation of gear wheels.
8. Check up pump backlashes between a gear wheel and the case.
9. Check up backlashes between gear wheels.
10. Collect the pump.
11. From редукционного the valve get a lock ring.
12. Get the plug.
13. Get a spring.
14. Get the piston.
15. Check up a condition of all details.
16. Measure length of a spring.
17. Collect the valve.


Assemblage is carried out upside-down, on engine M40 at assemblage replace an epiploon and all linings.

1. Establish new linings on a forward part of the block of cylinders.
2. Запрессуйте the new valve.