Service, the device and Folksvagen Sharan repair - 2.3.2. Dismantling of a head of the block of cylinders

Repair VW Sharan

. Diesel engines: 1,9 l TDI.
+ 1. Introduction
- 2. Engine VR6
   + 2.1. Cнятие and installation
   + 2.2. Dismantling and assemblage
   - 2.3. A head of the block of cylinders and valves
      2.3.1. Removal of a head of the block of cylinders
      2.3.2. Dismantling of a head of the block of cylinders
      2.3.3. Repair of a head of the block of cylinders
      2.3.4. Assemblage of a head of the block of cylinders
      2.3.5. Installation of a head of the block of cylinders
      2.3.6. A hydraulic pusher
   + 2.4. Pistons and rods
   2.5. The block of cylinders
   + 2.6. A cranked shaft and radical bearings
   + 2.7. A mechanism drive газораспределения
   2.8. An intermediate shaft
   2.9. Compression check in engine cylinders
   + 2.10. System of release of the fulfilled gases
+ 3. The two-litre engine (ADY)
+ 4. System of greasing of the engine
+ 5. Cooling system
+ 6. System of injection of fuel of engine VR6
+ 7. System Simos of injection of fuel of the 2,0-litre engine
+ 8. Ignition system
+ 9. Coupling
+ 10. A mechanical 5-step transmission
+ 11. Shaft of a drive of wheels
+ 12. The steering hydraulic booster
+ 13. A forward suspension bracket
+ 14. A back suspension bracket
+ 15. Brake system
+ 16. An electric equipment
+ 17. The diesel engine
+ 18. System of greasing of the diesel engine
+ 19. System of cooling of the diesel engine
+ 20. The power supply system of the diesel engine and turbocharger
+ Maintenance service card
+ Specifications and characteristics
+ Electroschemes

Folksvagen Sharan/Sharan repair>> Engine VR6>> Head of the block of cylinders and valves>> Dismantling of a head of the block of cylinders

Dismantling of a head of the block of cylinders carry out in a following order:

Fig. 28. Partially disassembled head of the block of cylinders (the heads of a detail located on the top part have been removed): 1 — a bolt, 25 Н�м; 2 — натяжитель a belt; 3 — the distributor of giving of fuel; 4 — a sealing lining of the bottom part of an inlet collector; 5 — the bottom part of an inlet collector; 6 — an ear for lifting; 7 — a bolt, 25 Н�м; 8 — a bolt of fastening of a head of the block of cylinders; 9 — a head of the block of cylinders; 10 — a lining of a head of the block of cylinders; 11 — a bolt, 25 Н�м; 12 — the O-shaped sealing ring; 13 — the thermostat case; 14 — a bolt, 10 Н�м; 15 — the holder of a cable; 16 — a bolt, 10 Н�м; 17 — the ignition coil; 18 — bolts, 10 Н�м; 19 — the holder; 20 — a sealing ring; 21 — натяжитель chains, 30 Н�м; 22 — a bolt, 10 Н�м; 23 — the Hall gauge; 24 — распорное a ring; 25 — the O-shaped sealing ring; 26 — распорное a ring; 27 — a cover of camshafts; 28 — the O-shaped sealing ring

- Remove all remained details located on a head of the block of cylinders (fig. 28 see);

- Clamp a head of the block of cylinders a collar fastened to the adjusting screw of the inlet pipeline;

- Remove camshafts (it can be made and on not removed engine), for what:

Fig. 27. The top part of an inlet collector: 1, 3, 4 — directing high voltage wires; 2 — the central cover

- Remove directing wires of spark plugs (fig. 27 see);

- Remove the top part of the inlet pipeline. Close open inlet channels a pure rag that foreign matters inside have not got;

- Turn a cranked shaft so that the piston of the first cylinder has appeared in the top dead point (ВМТ). If the engine is not removed, it is possible to raise slightly a forward wheel, to include the fifth transfer and, rotating a wheel, to establish the piston in position ВМТ. If the engine is removed, put on a nut of a flywheel of a cranked shaft накидной a wrench and turn a shaft so that both cams of a camshaft for valves of the first cylinder looked the round party upwards;

- Remove the ignition coil;

- If the engine is not removed, uncover heads of the block of cylinders;

- Remove a protective casing of asterisks of a drive of camshafts;

Fig. 31. Components of camshafts together with covers of bearings and asterisks: 1 — a cover of the bearing of a camshaft; 2 — a nut, 20 Н�м; 3 — camshafts; 4 — asterisks of camshafts; 5 — приводной the mechanism of the gauge of the Hall; 6 — bolts, 100 Н�м

- Turn out bolts 6 (fig. 31) asterisks 4 drives of camshafts;

Fig. 32. Fixing of camshafts. By arrows are shown шестигранники, intended for fixing of camshafts

- Fix camshafts in a motionless condition. For this purpose on everyone to a shaft is available шестигранник (fig. 32, it is shown by an arrow) on which put on рожковый a key �24 mm� and hold a camshaft.

- Turn out натяжитель 21 (fig. 28 see) chains from outside heads of the block of cylinders;

Fig. 33. Places for marks of chains of a drive of camshafts before removal are shown by arrows

- Remove asterisks of a drive of camshafts. If the chain of a drive of a camshaft is not removed yet, it is necessary to note a direction of installation of a chain (fig. 33) that she could be established correctly;

Fig. 34. Numbering of covers of bearings of camshafts. On each cover there is an arrow showing a direction of installation

- At first remove a camshaft of some cylinders 1, 3 and 5 (fig. 34). For this purpose ослабьте fastening of both covers of extreme bearings (number 1 and 7), and then, having turned away them completely, remove covers;

- In regular intervals to unload springs of valves, alternately cross-wise weaken nuts of covers of bearings (number 3 and 5) so that covers of bearings did not test pressure from springs;

- Remove both covers of bearings;

- Take out a camshaft from support of a head of cylinders;

- Remove a camshaft of some cylinders 2, 4 and 6 (fig. 34 see). For this purpose alternately cross-wise ослабьте nuts of a cover of the bearing number 4, also uncover the bearing;

- Similarly remove covers of bearings number 2 and number 6;

- Take out the second camshaft;

Fig. 35. Marks of hydraulic pushers

- Put risks-scratches on an inside of pushers, i.e. the first pusher — one risk, the second pusher — 2 risks etc. (fig. 35) as it is impossible to confuse them (readout begin from outside a drive of units of the engine) and take out pushers. Do not put pushers, and put a contact plane downwards;

The note

Pushers are supplied by the hydraulic elements regulating a backlash in клапанном a drive and consequently it is necessary to handle with care with pushers.

Fig. 36. Removal of valves by means of the special adaptation of firm "Volkswagen"

- The standard tool for removal and installation of valves is the tool at number 2036 (fig. 36). It fastens to a head of the block of cylinders. Release the valve 8 (fig. 37) from half of rod of the valve (crackers) 2, compressing springs 4 adaptation 2036;

Fig. 37. Details of the mechanism of a drive of valves: 1 — a hydraulic pusher; 2 — half of core of the valve (crackers); 3 — the top plate of a spring of the valve; 4 — valve springs; 5 — маслоотражательный a cap; 6 — the directing plug of the valve; 7 — a head of the block of cylinders; 8 — valves; a — height of a head of the block of cylinders

- For removal of valves it is possible to use also a piece of a pipe which is put on the top plate of a spring. Under a valve plate on the other hand it is necessary to enclose something to fix it. Shortly strike a hammer on a pipe so that there were half of rod of the valve. They remain in a pipe;

- Take out the top plate 3 (fig. 37 see) with springs 4, turn a head of cylinders 7 and take out from the bottom party the valve 8;

- Remove маслоотражательный a cap 5 from the directing plug 6;

The note

Maslootrazhatelnye caps always replace new.

- If at the car the big run or works are spent on the second-hand car about which a little that is known before establishing into place the block of cylinders it is necessary to measure height of a head of the block of cylinders — size a (fig. 37 see).