The exhaust and intake camshafts are connected by a single-row roller chain.
Via the engine control unit, the ignition timing, and thus the position of the intake camshaft, can be permanently changed by means of a slide control in accordance with the operating loads on the engine.
Valves are driven by roller rockers on hydraulic bearings (see illustration 10.0)
To remove the cover, unscrew the bolts (see arrows in illustration A), release it from the fastening on the central part of the cover and move upwards.
When installing the cover, it should be especially carefully docked with the central part, and then bolted in the upper part.
The tightening of the bolts for fastening the roller base plate is carried out in sequence from 1 to 5 with a force of 10 Nm (see illustration B).
Gas distribution mechanism drive. Vehicles with 110 kW petrol engine (150 hp.) AXW
1 - bolts. Tightening torque 10 Nm. Lubricate with protective paste before installation
2 - top cover of the gas distribution mechanism drive.
3 - bolt. Tightening torque 45 Nm
4 - engine mount bracket
5 - the central part of the cover of the gas distribution mechanism drive
6 - bolts. Tightening torque 10 Nm. Lubricate with protective paste before installation
7 - lower part of the cover of the gas distribution mechanism drive
8 - toothed timing belt. If the belt will be reinstalled after removal. then before removing, mark with chalk or a felt-tip pen the direction of its rotation. Check the condition of the toothed belt
9 - nut. Tightening torque 23 Nm
10 - gasket washer
11 - semi-automatic tension roller
12 - bolt Tightening torque 65 Nm
13 - camshaft gear. The position of the gear on the shaft is fixed with a key
14 - bolt. Tightening torque 10 Nm
15 - landing key. Ensure a firm fit
16- camshaft
17 - rear cover of the gas distribution mechanism drive
18 - tension roller base plate
19 - bolt. Tightening torque 40 Nm
20 - guide roller
21 - bolt. Tightening torque 10 Nm
22 - water pump
23 - O-ring. To be replaced after each disassembly
24 - bolt. Tightening torque 10 Nm
25 - base plate. When installing the board, bolts 1 are first screwed in and tightened with a force of 40 Nm, and then bolts 2 with a force of 15 Nm (see illustration C)
26 - toothed belt gear on the crankshaft. The gear can only be installed in one position. The mating surfaces of the gear and crankshaft must be degreased before installation.
27 - a bolt of fastening of a gear wheel of a toothed belt on a cranked shaft. Tightening torque 90 Nm + turn 90° (1/4 turn). The bolt must be replaced after each disassembly. Bolt thread lubrication is not allowed
28 - soothing roller
29 - bolt. Tightening torque 25 Nm
Gas distribution mechanism drive. Cars with a 2.0 liter petrol engine with a power of 110 kW (150 hp) BLR/BLX/BLY
1 - bolt. Tightening torque 10 Nm
2 - top cover of the gas distribution mechanism drive.
3 - bolt. Tightening torque 65 Nm 4 - camshaft gear. The position of the gear on the shaft is fixed with a key
5 - bolt. Tightening torque 10 Nm
6 - rear cover of the gas distribution mechanism drive
7 - landing key. Ensure a firm fit
8 - nut. Tightening torque 26 Nm
9 - semi-automatic tension roller
10 - water pump
11 - O-ring. To be replaced after each disassembly
12 - bolt. Tightening torque 25 Nm
13 - soothing roller
14 - bolt. Tightening torque 15 Nm
15 - bolt. Tightening torque 35 Nm
16 - soothing roller
17 - sealing flange
18 - toothed belt gear on the crankshaft. The gear can only be installed in one position. The mating surfaces of the gear and crankshaft must be degreased before installation.
19 - a bolt of fastening of a gear wheel of a toothed belt on a cranked shaft. Tightening torque 90 Nm + turn 90° (1/4 turn). The bolt must be replaced after each disassembly. Bolt thread lubrication is not allowed
20 - toothed timing belt. If the belt will be re-installed after removal, then mark the direction of rotation with chalk or a felt-tip pen before removing it. Check the condition of the toothed belt
21 - the lower part of the cover of the gas distribution mechanism drive
22 - engine mount bracket
23 - bolt. Tightening torque 45 Nm
24 - cover of the opening on the top of the protective cover of the gas distribution mechanism drive
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