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
   - 3.2. Dismantle and capital repairs of the engine
      3.2.2. Specifications
      3.2.3. Capital repairs – the general instructions
      3.2.4. Check of a compression in engine cylinders
      3.2.5. Capital repairs – general comments
      3.2.6. Diagnostics of the engine by means of the vacuum gage
      3.2.7. Capital repairs – alternatives
      3.2.8. Dismantle of the power unit
      3.2.9. Removal and installation of the engine
      3.2.10. Order of dismantling of the engine
      3.2.11. Dismantling of a head of the block of cylinders
      3.2.12. Cleaning and check of a head of cylinders and details of the valvate mechanism
      3.2.13. Repair of valves
      3.2.14. Assembly of a head of the block of cylinders
      3.2.15. Removal of pistons and rods
      3.2.16. Dismantle of the crankshaft
      3.2.17. Intermediate shaft (only M20 engine)
      3.2.18. Cleaning of the block of cylinders
      3.2.19. Check of a condition of the block of cylinders
      3.2.20. Honningovaniye of cylinders
      3.2.21. Check of a condition of pistons and rods
      3.2.22. Check of a condition of the crankshaft
      3.2.23. Check of radical and conrod bearings
      3.2.24. Engine assembly order
      3.2.25. Installation of piston rings
      3.2.26. Installation of an intermediate shaft
      3.2.27. Installation of the crankshaft and check of gaps in radical bearings
      3.2.28. Installation of a back epiploon
      3.2.29. Installation of rods and pistons, check of gaps in conrod bearings
      3.2.30. Launch of the engine after repair and a running in
   + 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


3.2.14. Assembly of a head of the block of cylinders

1. Before assembly the head of cylinders has to be completely cleared.
2. If the head was taken to repare, then on it have to be already installed valves and assembly it is necessary to begin, being guided by point 7.
3. Oil a core of the 1st valve fresh for the engine (or molybdenic lubricant) and install in the corresponding directing plug.
4. Dip an oil scraper cap into fresh oil for the engine and dress on a core of the valve and on the directing plug, finalize a cap a mandrel, having slightly knocked on it with the Hummer. It must be kept in mind that on a part of engines oil scraper caps of inlet and final valves differ.

5. Squeeze adaptation a spring and insert crackers into a flute on a valve core.
6. Repeat the procedure for all valves, having established all details on former places (if the removed details of the valvate mechanism are established).
M10 and M20 engines
7. Collect yokes with rollers as it should be the return to dismantling, track correctness of installation of rollers (see subsection 3.2.11).

8. Grease necks of a cam-shaft and cams and establish in a head of cylinders so that necks did not touch yokes (which wring out).
M40 engines
9. Grease openings in a head of cylinders and establish hydropushers on former places.
10. Establish disks, levers of pushers and fingers of levers on former places.
11. Grease cam-shaft beds in a head of cylinders.
12. Establish a cam-shaft in a head of cylinders so that valves of the 1st tsidindr opened, the final valve of the 4th tsidindr was closed, and inlet – is open.
13. Grease covers of basic necks of a cam-shaft. establish them on I sweep and screw bolts. Tighten bolts evenly and gradually, till the set moment.
14. Replace a forward epiploon of a cam-shaft (see subsection 3.1.12).
All engines
15. Establish an oil pipeline branch pipe, having replaced a sealant and having tightened bolts with the set moment.
16. Establish a head of cylinders (see subsection 3.1.13).