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


3.1.15. Oil pump


Engines M10 and М20
1. Remove the pallet.
2. On the M10 engine unscrew 3 bolts of fastening of a conducted gear wheel (or a nut).
3. Unscrew bolts.
4. Remove the pump.
5. On the M20 engine rotation is transferred to the pump through the intermediate shaft connected with the leading roller of the pump. For access to the roller remove a clamping plate and get a cap. Take out the leading roller and examine gear wheels. In case of wear 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.
M40 engine
7. Remove a gear belt, a head of cylinders and a natyazhitel of a belt.
8. Unscrew a bolt of a nave of a sock of the crankshaft (see subsection 3.1.11) and remove an asterisk with a dividing washer (the ledge on a washer should be turned inside).
9. Unscrew bolts and get directing and stabilizing rollers (M40).
10. Get a shponka (M40).
11. Remove the remote plug.
12. Unscrew 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 crankshaft sock. Vypressuyte an epiploon from the case.


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


Assembly is carried out upside-down, on the M40 engine at assembly replace an epiploon and all laying.

1. Establish new laying on a forward part of the block of cylinders.
2. Press the new valve.