BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car



BMW E30
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engine
   - 3.1.2. Specifications
      3.1.3. Types of the repair work performed without dismantle of the engine
      3.1.4. Order of installation of the piston of the 1st cylinder in compression step VMT
      3.1.5. Cover of a head of cylinders
      3.1.6. The soaking-up collector
      3.1.7. Final collector
      3.1.8. Cam-shaft drive chain covers (M10 engine)
      3.1.9. Chain and asterisks (M10 engine)
      3.1.10. Covers of a gear belt (M20 and M40 engines)
      3.1.11. Gear belt and asterisks of a cam-shaft (M20 and M40 engines)
      3.1.12. Forward epiploons
      3.1.13. Head of cylinders
      3.1.14. Pallet
      3.1.15. Oil pump
      3.1.16. Flywheel (drive plate)
      3.1.17. Back epiploon of the crankshaft
      3.1.18. Engine mount details
   + 3.2. Dismantle and capital repairs 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. Useful tips



3.1.2. Specifications

GENERAL INFORMATION

All sizes and gaps are specified in mm.

Working volume of engines:
  – 316i (1988-91)
1596 cm3 (M40 engine, 4-cylinder)
  – 316 (1983-88) and 318i (1983-87)
1766 cm3 (M10 engine, 4-cylinder)
  – 318i (1987-91)
1796 cm3 (M40 engine, 4-cylinder)
  – 320i (1987-91)
1990 cm3 (M20 engine, 6-cylinder)
  – 323i (all)
1990 or 2316 cm3 (M20 or M60 engine, 6-cylinder)
  – 325i (1987-91)
2494 cm3  (M20 engine, 4-cylinder)
Numbering of cylinders:
  – Operating procedure
1–3–4–2
  – 4-cylinder
1–3–4–2
  – 6-cylinder
1–5–3–6–2–4
Lubrication system:
  – Oil pressure:
     • idling
0,5–2,0 kgfs/cm2
     • at 4000 rpm
it is not lower than 4,0 kgfs/cm2
  – Gaps of the oil pump (M40):
     • between the conducted rotor and a pump housing and in gearing of rotors
0,12–0,20
     • Length of a spring of the reducing valve (M40)
84,1

The inhaling moments (in N. of m)

Cap of a natyazhitel of a chain
35
Bolts of a natyazhitel of a chain
22
Cam-shaft asterisk bolt:
  – M10 engines
10
  – M20 and M40 engines
65
Bolts of fastening of a cover of a chain to the engine:
  – M6 bolt
10
  – M8 bolt
22
  – M10 bolt
47
Crankshaft pulley bolt
22
Bolt or nut of a nave of the crankshaft:
  – M10 engine
190
  – M20 engine
410
  – M40 engine
310
Bolts of a head of the block of cylinders (at assembly it is recommended to change):
  – M10 engine, 4-cylinder
     • 1st stage of an inhaling
60
     • the 2nd stage (to wait for 15 min.)
to tighten on 33 °
     • the 3rd stage (after warming up of the engine)
to tighten on 25 °
  – The M20 engine, 6-cylinder, bolts with 6-faced heads
     • 1st stage of an inhaling
30
     • 2nd stage
to tighten on 90 °
     • 3rd stage
to tighten on 90 °

  – M40 engine, 4-cylinder

     • 1st stage of an inhaling
30
     • 2nd stage
to tighten on 90 °
     • 3rd stage
to tighten on 90 °
Bolts of the soaking-up collector:
  – M8 bolt
22
  – M7 bolt
15
  – M6 bolt
10
Nuts of a final collector:
  – M7 nut
15
  – M6 nut
10

Bolts of fastening of a flywheel (drive plate of the hydrotransformer)

105 (120)
Bolt of fastening of an asterisk of an intermediate shaft
60
Bolts of fastening of the oil pallet (except M40)
22
Bolt of fastening of an asterisk of the oil pump (M10)
10
Bolts of fastening of a cover of the oil pump (M40)
9
Bolts of fastening of a forward cover to the block of cylinders (M20 and M40):
  – M6 bolt
10
  – M8 bolt
22
Bolts of fastening of the holder of a back epiploon:
  – M6 bolt
9
  – M8 bolt
22