5.13.2. Replacement of laying of a head of the block of cylinders

Laying of a head of the block of cylinders is replaced at damage.
Main signs of damage of laying of a head of the block:
– the insufficient compression — is lower than 1 MPa (10 kgfs/cm2) in one or several cylinders;
– break of gases in the cooling system (a swirling, foaming of liquid in a radiator, bystry falling of level of liquid in a broad tank in the absence of external leaks);
– hit of cooling liquid in the lubrication system (an emulsion on the index of level of oil, stratification of the oil merged from a case that is especially noticeable in transparent capacity);
– hit of oil in the cooling system (an oil film on the surface of liquid in a broad tank).
For replacement of laying it is necessary to remove a head of the block of cylinders with a receiver and a final collector. If the head of the block of cylinders is removed from the engine installed on the car it is necessary to merge cooling liquid previously (see. "Replacement of cooling liquid").
It will be required to you: keys "on 12", "on 13", "on 17", hexagons "on 6", "on 12", the screw-driver.
1. Disconnect a wire from the minus plug of the rechargeable battery.
2. Merge liquid from the cooling system (see. "Replacement of cooling liquid").
3. Remove the generator (see. "Removal and installation of the generator on cars with the petrol engine").
4. Turn off four couples of nuts of fastening of a reception pipe to a final collector.
5. Turn out a bolt of fastening of a reception pipe to an arm on the transmission and take away a reception pipe from a final collector.
6. Disconnect blocks of plaits of wires from sensors of a mass consumption of air...
7.... provisions of a butterfly valve...
8.... and provisions of a bent shaft.
9. Weaken an inhaling of a collar of fastening of the airbringing pipe, remove a pipe and take her aside.
10. Disconnect the end of a cable from the sector of the drive of a butterfly valve.
11. Weaken fastening of a tip of a braid of a cable to an arm...
12. … take a cable braid tip from an arm and take a cable aside.
13. Uncover a head of the block of cylinders (see. "Replacement of laying of a cover of a head of the block of cylinders").
14. Remove a gidronatyazhitel of the top chain (see. "Removal and dismantling of gidronatyazhitel of chains").
15. Remove camshafts (see. "Removal, troubleshooting and installation of camshafts").
16. Disconnect blocks of a motor plait from nozzles.
17. Turn off a forward nut of fastening of a receiver and remove "mass" wires from hairpins.
18. Disconnect a block of a plait of wires from the idling regulator.
19. Turn off a back nut of fastening of a receiver, remove from a hairpin the holder 2 toplivopodvodyashchy hoses and the second "mass" wire of 1 plait, and then take aside a plait of wires.
20. Weaken collars of hoses on throttle knot and disconnect hoses.
21. Turn off nuts of the giving and drain fuel highways and take highways aside.
22. Remove camshafts (see. "Removal, troubleshooting and installation of camshafts").
23. Turn out bolts of fastening of an uspokoitel of the top chain and remove it.
24. Take out the index of level of oil.
25. Disconnect a block of a plait of wires from the air temperature sensor.
26. Turn off an extreme right nut of a final collector...
27. … also remove from a hairpin the holder of the pipeline of the cooling system.
28. Turn out bolts of 1 fastening of a head of the block of cylinders in the sequence, the return inhaling.
29. Remove a head of the block of cylinders.
30. Remove laying.
31. Carefully clear of a deposit, the remains of old laying and sealant privalochny surfaces of a head and the block of cylinders.
32. Grease new laying on both sides with a thin layer of graphitic lubricant, and in the place of contact with a forward cover of the block — heat-resistant glue-sealant.
33. Lay laying on the block of cylinders, having tracked that adjusting plugs of the block entered the corresponding openings of laying.

Fig. 5.7. Sequence of an inhaling of bolts of fastening of a head of the block of cylinders

34. Establish a block head as it should be, the return to removal. The order of an inhaling of bolts of fastening of a head of the block is shown in fig. 5.7. Tighten bolts of fastening of a head of the block of cylinders in two stages:
The 1st – 40–60 N · m (4,0–6,0 kgfs · l);
The 2nd – 130–145 N · m (13,0–14,5 kgfs · м).