BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

+ 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


3.1.8. Cam-shaft drive chain covers (M10 engine)



The top cover of a chain can be removed separately. Removal of both covers requires the special tool.


1. Disconnect the battery from weight.
2. For removal of the lower cover remove the fan with a casing (see subsection 4.6), radiator (see subsection 4.5) of and a fan belt pulley (see subsection 4.6).
3. Remove the pump of cooling liquid (see subsection 4.7).
4. On a part of cars uncover the ignition distributor, runner and a plastic casing of black color under the runner.
5. Uncover a head of cylinders (see subsection 3.1.5).
6. If the lower cover is removed, then turn off a crankshaft pulley bolt, having recorded it BMW 11 2 100 adaptation or equivalent, or having stopped a flywheel through an observation port the big screw-driver. Remove a pulley a stripper, captures of a stripper have to rest against a wall of an internal flute of a pulley.
7. Turn off a cap and get a spring of a natyazhitel of a chain and a plunger, meaning considerable effort of straightening of a spring.
8. Turn off bolts and nuts and remove the top cover. Sketch an arrangement of each bolt of fastening that at assembly to wrap them on former places. If necessary displace a cover blows of the Hummer through a wooden pro-rate.
9. Turn off bolts and nuts of fastening of the lower cover. Keep in mind that from below the cover fastens 3 bolts to the oil pallet of the engine, it is necessary to release all bolts of the pallet. Turn off 3 specified bolts of fastening of a cover of a chain to the oil pallet.
10. The sharp knife inserted under laying between a cover and the pallet, carefully not to damage laying, separate the lower cover.
11. Destroy by easy blows of the Hummer through a pro-rate consolidation between a cover and the block of cylinders, uncover.
12. Carefully clear the condensed planes of a cover and the block of cylinders of the remains of consolidations, having taken measures against damage of the planes.


1. Replace a forward epiploon (see subsection 3.1.12).
2. Apply sealant drops on the demountable planes of the pallet and the lower cover of a chain, and also to the place of a joint of laying and the block of cylinders.

If laying of the pallet in the place of a prileganiye of a cover of a chain is damaged, then it is possible to cut off a part of the old laying supporting the block of cylinders and to replace it with a piece from new laying which in accuracy corresponds to replaced. Paste a laying piece to the pallet special glue and put RTV sealant drops.

3. Establish new laying of the lower cover, having greased it with sealant and gradually tighten fastening bolts with the set moment in a cross order. At first tighten bolts of fastening of a cover to the block of cylinders, then bolts of fastening of the pallet. At an excessive vystupaniye of laying cut it on a contour. After putting sealant assembly should be finished not later than in 10 min., otherwise sealant will harden.
4. Establish the top cover of a chain, having cut off an edge the acting parts of laying.
5. Further assembly is carried out upside-down.