2.8.3.2. Dismantling and assembly of a head of cylinders


Details of the block of cylinders of the engine M 102

1 — the block of cylinders
2 — the holder of a back epiploon of a bent shaft
3 — a cover of the distributive mechanism
4 — an oil case
5 — a forward epiploon of a bent shaft
6 — a back epiploon of a bent shaft
7 — laying of an oil case

8 — a cover of the radical bearing
9 — a centering pin
10 — a stopper
11 — a cap
12 — the index for installation of the moment of ignition
13 — the fuel pump
14 — an adjusting pin


Dismantling of a head of cylinders of the 4-cylinder engine

1 — a head of cylinders
2 — the camshaft bearing case
3 — the oil highway
4 — laying of a head of cylinders
5 — a cover of a head of cylinders
6 — a maslootrazhatel

7 — laying of a cover of a head of cylinders
8 — the directing valve plug
9 — a valve saddle
10 — a cap
11 — a stopper


Dismantling

Dismantling of a head of cylinders of the 4-cylinder engine

1 — a maslootrazhatelny cap of the valve
2 — a plate of a valve spring

Removal of crackers of valves on a head of cylinders of the 4-cylinder engine


 PERFORMANCE ORDER

  1. Remove a head of cylinders.
  2. Remove a final collector with laying.
  3. On engines with injection of fuel remove the inlet pipeline together with the measuring instrument of a consumption of air and the batcher of fuel assembled.
  4. On engines with hydraulic pushers of valves gradually turn off bolts of fastening of cases of bearings of the camshaft.
  5. Remove plates of pushers and apply tags on pushers and on their nests.
  6. Take out the camshaft from support of a head of cylinders.
  7. Exempt valves from crackers, squeezing a spring of valves special adaptation.
  8. On the engine with adjustable gaps in the drive of valves as much as possible turn out adjusting bolts.
  9. Gradually turn off bolts of fastening of bearings of an axis of yokes.
  10. Remove a plate, a spring, take out the valve and mark its situation in a head of cylinders.
  11. Remove a maslootrazhatelny cap from the directing valve plug.
  12. Take out a basic washer of a spring.
  13. Check a condition of valves, saddles and the directing plugs of valves, and also a gap between the directing plugs and cores of valves.
  14. Clear a head of cylinders and the removed details. On engines with hydraulic pushers of valves check channels of lubricant of axes of yokes (a condition of the ball backpressure valve).
  15. Eliminate the revealed malfunctions (the sizes see in the subsection Design and technical characteristics — the Cooling system).
  16. After grinding or repeated processing carefully clear saddles and channels of a head of cylinders.
  17. Turn off bolts of fastening of a rack of an axis of a yoke and by means of a bolt of M8 take out a yoke axis.
  18. Check a condition of an axis, a yoke and lubricant channels.


Assembly

Cross-section of a head of cylinders of engines M 102 with hydraulic compensation of thermal gaps in the drive of valves

Arrangement of valves on the engine M 102

VYP — final valves
VP — inlet valves


 PERFORMANCE ORDER

  1. Napressuyte on the new maslootrazhatelny caps directing plugs of valves.
  2. Insert valves into the directing plugs, establish springs and plates of springs.
  3. Squeezing a spring special adaptation, establish crackers of valves.
  4. On engines with hydraulic pushers install plates of pushers.
  5. Collect racks of axes of yokes with yokes and axes, having provided coincidence of channels of axes to openings of bolts of fastening.
  6. Lay the camshaft in support of a head of cylinders and establish racks of axes of yokes on the former place.
  7. Screw bolts of fastening of cases of bearings of the camshaft and tighten them gradually till the set moment (see in the subsection Design and technical characteristics — the Cooling system).
  8. Turn the camshaft in the situation corresponding to a combustion phase in the first cylinder (valves have to be closed, and the tag on the camshaft has to be against edge of a head of cylinders).
  9. Install the inlet pipeline and a final collector.
  10. Further assembly is carried out as it should be, the return to dismantling.
  11. Establish a head of cylinders.