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Dismantling the cylinder head
Dismantling the cylinder head in the following order:
| Fig. 28. The partially disassembled cylinder head (were dropped on the top of the head parts): 1 - a bolt, 25 Nm; 2 - belt tensioner; 3 - Fuel distributor; 4 - gasket bottom of the intake manifold; 5 - the lower part of the intake manifold; 6 - Lifting ear; 7 - bolt 25 Nm; 8 - a bolt of fastening of the cylinder head; 9 - cylinder head; 10 - cylinder head gasket; 11 - a bolt, 25 Nm; 12 - O-ring seal; 13 - the thermostat; 14 - bolt 10 Nm; 15 - cable holder; 16 - bolt 10 Nm; 17 - the ignition coil; 18 - bolts 10 Nm; 19 - the holder; 20 - a sealing ring; 21 - chain tensioner, 30 Nm; 22 - bolt 10 Nm; 23 - Hall sensor; 24 - spacer ring; 25 - the O-shaped sealing ring; 26 - spacer ring; 27 - a cover of the camshaft; 28 - The O-ring seal
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- Remove any remaining items that are located on the cylinder head (see. Fig. 28); - Tighten the cylinder head clamp, screw screwed to the installation of the inlet pipeline; - Remove the camshafts (this can be done on the engine unexpunged), as follows:
| Fig. 27. The upper part of the intake manifold 1, 3, 4 - high voltage rails; 2 - the central cover
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- Remove the spark plug wire guides (see. Fig. 27); - Remove the top part of the inlet pipeline. Close the open inlet channels with a clean cloth in order to not fall into the foreign body; - Rotate the crankshaft so that the piston of the first cylinder was in the top dead center (TDC). If the engine is not removed, it is possible to slightly raise the front wheel, turn the fifth gear and turn the wheel to set the piston to TDC. If the motor is removed, then put it on the crankshaft flywheel nut ring spanner and turn the shaft so that both cams of the camshaft to the valves of the first cylinder looked round side up; - Remove the ignition coil; - If the engine is not removed, remove the cylinder head cover; - Remove the protective casing Stars timing;
| Fig. 31. Components of the camshafts with the bearing caps and asterisks: 1 - a cover of the bearing of the camshaft; 2 - nut 20 Nm; 3 - camshafts; 4 - the camshaft sprocket; 5 - the drive mechanism of the Hall sensor; 6 - bolts 100 Nm
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- Remove the screws 6 (Fig. 31) 4 stars timing;
| Fig. 32. Fixation camshafts. The arrows show the hexagon for fixing the camshafts
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- Fix the camshafts in a stationary condition. To this end, each shaft has a hexagon (Fig. 32, arrow), which put a spanner "24 mm" and hold the camshaft. - Turn the tensioner 21 (see. Fig. 28) of the chain from the cylinder head;
| Fig. 33. Designated marking timing circuits before removing shown by arrows
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- Remove the sprocket timing. If a camshaft drive chain has not yet been removed, it should be noted installation direction of the chain (Fig. 33) so that it can be properly set;
| Fig. 34. The numbering of the camshaft bearing caps. Each cover has an arrow indicating the direction of installation
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- First remove the camshaft cylinder bank 1, 3 and 5 (Fig. 34). To do this, loosen both outer bearing covers (numbers 1 and 7) and then unscrewing them completely, remove the lid; - In order to uniformly discharge the valve springs alternately crosswise loosen nut bearing caps (number 3 and 5) so that the bearing covers have not experienced the pressure of the springs; - Remove both bearing caps; - Remove the camshaft bearings of cylinder head; - Remove the camshaft cylinder bank 2, 4 and 6 (see. Fig. 34). To this end, alternately crosswise, loosen the nut cap bearing the number 4, and remove the bearing cover; - Similarly remove covers bearing the number 2 and number 6; - Remove the second camshaft;
| Fig. 35. Marking of hydraulic pushers
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- Apply the risk-scratches on the inside of the tappets, ie the first cam - a risk a second pusher - 2 risks, etc. (Fig. 35), since they can not be confused (the count starts from the drive motor units) and remove the tappets. Do not stack pushers, and put down the contact plane;
Note Pushers are equipped with hydraulic elements regulating valve clearance, and thus with pushers should be handled carefully. |
| Fig. 36. Removing the valves using a special device company ?�Volkswagen?�
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- A standard tool for installing and removing the valve tool is at number 2036 (Fig. 36). It is attached to the cylinder head. Release valve 8 (Fig. 37) from the valve stem halves (crackers) 2, 4, compressing the spring device in 2036;
| Fig. 37. Details of the mechanism of the valve: 1 - hydraulic pusher; 2 - half of the valve stem (biscuits); 3 - the top plate of the valve spring; 4 - valve spring; 5 - stem seal; 6 - Valve Guides; 7 - cylinder head; 8 - valves; a - the height of the cylinder head
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- To remove the valve can be used as a piece of pipe that fits over the upper spring. Under the valve plate with the other hand it is necessary to enclose something to fix it. Briefly hit with a hammer on the pipe so that the left half of the valve stem. They will remain inside the tube; - Remove the top plate 3 (see. Fig. 37) with the springs 4, rotate the cylinder head 7 and remove the underside of the valve 8; - Remove the valve stem cap 5 with the guide sleeve 6;
Note Valve stem seals are always replaced by new ones. |
- If the car high mileage or work is carried out on a second-hand car, about which little is known, then before refit the engine block must measure the height of the cylinder head - the value of a (see. Fig. 37).
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