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

At detection of a leak of engine oil or cooling liquid in head junctions with the block of cylinders remove a head and replace its laying. The leak can arise also owing to a block head buckling because of an overheat.
It will be required to you: a dynamometer key, keys "on 13", "on 17", "on 19", face heads "on 10", "on 13", "on 17", a key hexagon "on 10", the screw-driver.

Prevention
Laying of a head of the block — single use therefore at each removal of a head of the block laying needs to be replaced.

1. Remove a decorative casing of the engine (see. "Removal and installation of a decorative casing of the engine").
2. Install the piston of the 1st cylinder in the provision of VMT of a step of compression (see. "Installation of the piston of the first cylinder in the provision of VMT of a step of compression").
3. Reduce pressure in a power supply system if work is performed right after a trip (see. "Pressure decrease of fuel in an engine power supply system").
4. Disconnect a wire from the minus plug of the rechargeable battery.
5. Merge cooling liquid (see. "Replacement of cooling liquid").
6. Remove the air filter (see. "Removal and installation of the air filter").
7. Disconnect from throttle knot hoses of heating, a small branch of system of ventilation of a case, an adsorber purge, the airbringing sleeve, blocks of plaits of wires of the sensor of provision of a butterfly valve and the regulator of idling (see. "Removal and installation of throttle knot").
8. Remove throttle knot (see. "Removal and installation of throttle knot").
9. Disconnect blocks of a plait of wires from ignition coils. Remove coils of ignition and turn out spark plugs (see. "Replacement and service of spark plugs").
10. Disconnect a block of a plait of wires from the sensor of emergency pressure drop of oil …
11. … from the sensor of temperature of cooling liquid of a control system of the engine …
12. … and sensor of phases.
13. Weaken an inhaling of collars and disconnect five hoses of the cooling system from thermostat branch pipes.
14. Disconnect a block of a plait of wires from the sensor of the index of temperature of cooling liquid.
15. Turn off a key "on 13" a nut of fastening of a tip of a "mass" wire …
16. … also remove a wire.
17. Turn off a nut of the union of a fuel hose and disconnect it from a fuel-supply line tube.

Prevention
The tip of a tube of a fuel-supply line is condensed with a rubber ring. Do not lose it when dismantling. Replace strongly pressed out or torn sealing ring.

18. Turn out the screw of a clamping plate of an arm of fastening of a fuel-supply line to a head of the block of cylinders and remove a plate.
19. Turn out a key "on 10" a fastening bolt …
20. … also disconnect a "mass" wire from a block head.
21. Remove an inlet collector (see. "Replacement of laying of a cover of a head of the block of cylinders").
22. Uncover a block head (see. "Replacement of laying of a cover of a head of the block of cylinders").
23. Turn out a six-sided key "on 5" bolts of fastening and remove a forward protective cover of a belt of the drive of the gas-distributing mechanism...
24. … also uncover.
25. A six-sided key "on 5" turn out bolts of fastening of the lower forward cover of a belt of the drive of the gas-distributing mechanism …
26. … also uncover.
27. Weaken a key "on 15" a bolt of fastening of a tension roller...
28.... also take off a belt of the drive of the gas-distributing mechanism.
29. Holding pulleys of camshafts from a provorachivaniye, turn out bolts of fastening of pulleys …
30. … remove pulleys …
31. … also take splines from grooves of shafts of shaft.

Good advice
For keeping from a provorachivaniye of camshafts at a reversing of bolts of fastening of cogged pulleys of camshafts we recommend to use adaptation shown on a photo.

Note
At pulleys of inlet and final camshafts the identical landing sizes, but on a pulley of the inlet camshaft the disk ensuring functioning of the sensor of phases is fixed.

32. Having turned out a key "on 15" a fastening bolt, shoot a tension video.

Note
Pay attention that under a roller the remote ring is established.

33. Having turned out a key "on 15" a fastening bolt, shoot a basic video.
34. Turn out a key "on 10" five bolts of fastening of a back protective cover of a belt of the drive of the gas-distributing mechanism...
35.... also uncover.

Fig. 5.6. Order of an inhaling of bolts of fastening of a head of the block of cylinders

36. Turn out a six-sided key "on 10" bolts of fastening of a head of the block to the block of cylinders as it should be, the return to an inhaling (fig. 5.6)...
37.... also remove a block head from the engine.

Prevention
Do not hammer the screw-driver or other tools between a head and the block of cylinders.

Useful tips
It is more convenient to remove a head of the block of cylinders with the assistant as it is quite heavy.

38. Remove laying of a head of the block.

Note
Bolts of fastening of a head of the block of cylinders are extended at repeated use. Replace bolts which length (without head height) exceeds 98 mm new. Before installation of a head of the block grease bolts with a thin layer of engine oil.

39. Clear privalochny surfaces of a head of the block and block of cylinders (they have to be dry and pure).
40. Remove oil from carving openings in the block under bolts of fastening of a head.

Prevention
If not to remove oil from carving openings under bolts of fastening of a head of the block, at an inhaling of bolts in the block of cylinders there can be cracks as oil does not compress.

41. Check existence of two adjusting plugs in nests of extreme openings of the block of cylinders under bolts of fastening of a head. If at removal of a head of the plug remained in a head or left block nests, press them in the block against the stop.
42. Install new laying of a head on the block. Use of the laying which was in the use is not allowed. Before installation of laying it is necessary to remove oil from the privalochny surfaces of the block and its head. Laying has to be pure and dry. Hit of oil on the surface of laying is not allowed.
43. Install a head on the block, previously having convinced that cranked and camshafts are in the provision of VMT (both valves of the 1st cylinder have to be closed). Tighten bolts of fastening of a head of the block in the sequence specified fig. 5.6 in four stages:
The 1st — the moment of 20 N · m (2 kgfs · l);
The 2nd — the moment of 69,4-85,7 N · m (7,1–8,7 kgfs · l);
The 3rd — tighten bolts on 90 °;
The 4th — finally tighten bolts on 90 °.
44. Establish the removed details on a block head and connect to it hoses and wires as it should be, the return to removal. Establish a pulley of the inlet camshaft by the disk ensuring functioning of the sensor of phases to the engine. Similarly establish a pulley of the final camshaft. Adjust a tension of a belt of the drive of the gas-distributing mechanism (see. "Replacement of a belt of the drive of the gas-distributing mechanism and a tension roller", page 81) and a generator drive belt (see. "Check of a tension of a belt of the drive of the generator").

Note
Before installation of a cover of a head of the block of cylinders apply Loktayt-574 sealant on the case of bearings of the camshaft. It is allowed to launch the engine not earlier than in 1 h after putting sealant.