The cylindrical springs assembled with the shock absorbers installed inside them form a shock absorber strut. The upper part of the shock absorber strut is attached to the upper bracket of the front suspension, and the lower part is attached to the transverse arm.
Torque from the gearbox to the wheels is transmitted using constant velocity joint drive shafts.
Each shaft consists of three parts: the inner and outer constant velocity joints (CV joints) and the central part of the shaft.
The splined end of the outer joint housing is inserted into the wheel hub and secured with a nut. The CV joints are lubricated with consistent grease, which is replaced only when the joint is disassembled.
Attention. It is strictly forbidden to carry out welding and straightening work on the front suspension elements. Be sure to replace the self-locking nuts, as well as bolts with traces of corrosion.
Fig. 7.1. Front suspension of AUDI A6 cars
1 - bearing support bracket,
2 - shock absorber strut,
3 - console,
4 - lower front frame for mounting units,
5 - stabilizer bar,
6 - drive shaft,
7 - three-arm joint (Tripoid),
8 - upper rear wishbone,
9 - steering rod,
10 - upper front wishbone,
11 - steering knuckle,
12 - hydraulic support,
13 - lower rear wishbone,
14 - lower front wishbone,
15 - stabilizer earring
Fig. 7.2. Elements of the front suspension of AUDI A6 cars
1 - hexagon head bolt, 65 Nm,
2 - washer,
3 - hexagon head bolt M10x60,
A new bolt must be used during installation.
4 - front upper wishbone, Replace the rubber-metal support.
5 - hexagon head bolt, 7 Nm,
6 - bolt,
7 - self-locking nut, 50 Nm,
A new self-locking nut must be used during installation.
8 - hexagon head bolt M10x100,
9 - self-locking nut, 40 Nm,
A new self-locking nut must be used during installation.
10 - Upper front wishbone, The wishbone can only be removed together with the bracket.
11 - shock absorber strut,
12 - bolt M12x1.5x120,
It is recommended to use a new bolt during installation.
13 - lower rear wishbone with hydraulic support,
If oil is leaking from the hydraulic support, the support must be replaced.
14 - self-locking nut, 100 Nm, A new nut must be used during installation.
15 - steering knuckle,
16 - protective plate,
17 - bolt,
When installing, a new bolt must be used. When tightening the bolt, the car must stand on its wheels.
Tightening torques:
- Bolt M14 - 115 Nm + turn by 180°;
- Bolt M16 - 190 Nm + tighten by 180°.
18 - bolt, 10 Nm,
19 - self-locking nut, 100 Nm,
20 - bolt M12x1.5x85,
21 - self-locking nut, 90 Nm, A new nut must be used during installation.
22 - stabilizer earring,
The arrow on the earring points to the front of the car.
23 - self-locking nut with notches, 70 Nm,
A new nut must be used during installation.
Attention. There are special notches on the bottom side of the nut and when installing it is necessary to use a nut with the same notches.
24 - bolt with combined head M12x1.5x100,
A new bolt must be used during installation.
25 - lower front wishbone,
26 - bolt with combination head M12x1.5x105, 110 Nm + tighten by 90°,
A new bolt must be used during installation.
27 - hexagon head bolt M10x70, 70 Nm,
A new bolt must be used during installation.
28 - self-locking nut with notches, 100 Nm,
A new nut must be used during installation.
Attention. There are special notches on the bottom side of the nut and when installing it is necessary to use a nut with the same notches.
29 - clamp,
The clamp is installed on the lower front control arm.
30 - lower front frame,
Caution: Do not lift the vehicle by the lower front frame.
31 - hexagon head bolt M8x25, 25 Nm,
32 - lower front frame support plate,
33 - self-locking nut, 80 Nm + turn further by 90°,
A new self-locking nut must be used during installation.
34 - self-locking nut, 90 Nm + turn further by 90°,
A new self-locking nut must be used during installation.
35 - bolt,
Tightening torques:
- Bolt M8x48 - 40 Nm;
- Bolt M10x48 - 80 Nm.
36 - plate,
37 - drive shaft with constant velocity joints,
38 - drive shaft with three-arm joint,
39 - bolt M10x20, 80 Nm, Used for fastening wire shafts with three-arm joint.
40 - hexagon head bolt, M10x62,
A new bolt must be used during installation.
41 - front suspension upper support bracket,
42 - self-locking nut, 50 Nm + turn 90°,
A new self-locking nut must be used during installation.
43 - self-locking nut, 20 Nm. A new self-locking nut must be used during installation.
This publication is borrowed from the resource AudiManual.ru