Find out if there are any cracks or traces of contact with road obstacles or the body on the suspension parts, deformation of the levers, stabilizer bar, rear body parts in the places where the suspension units and parts are attached.
Check the condition of the rubber-metal hinges, rubber cushions, and the condition (settlement) of the suspension springs.
Rubber-metal hinges and rubber cushions are subject to replacement in case of ruptures and one-sided bulging of the rubber, as well as in case of cutting of their end surfaces.
Fig. 4.3. Location of rear suspension elements on the vehicle: 1 – stabilizer bar mounting bracket; 2 – stabilizer bar cushion; 3 – rear suspension cross member; 4 – silent block of the front lower arm of the rear suspension; 5 – Front lower arm of the rear suspension; 6 – Upper arm of the rear suspension; 7 – Rear suspension trailing arm; 8 – shock absorber; 9 – rubber bushing of the lower shock absorber mount; 10 – silent block of the rear lower arm of the rear suspension; 11 – spring; 12 – rear lower arm of the rear suspension; 13 - anti-roll bar; 14 – stabilizer strut
The location of the rear suspension elements on the vehicle is shown in Fig. 4.3.
The following are not permitted on rubber-metal hinges:
- signs of aging, cracks;
- one-sided bulging of the rubber mass.
Replace defective parts.
Check for mechanical damage (deformations, cracks, etc.) to suspension components.
1. Inspect the rubber bushings 9 (see Fig. 4.3) of the lower shock absorber mount and the shock absorbers 8. No fluid leaks or "sweating" are allowed on the shock absorbers.
2. Remove the protective shields from both sides of the vehicle (see "Removing and installing the rear suspension crossmember").
3. Check the rubber-metal hinges (silent blocks) of the rear suspension trailing arm to the car body.
4. Using a mounting blade, check the internal… for play
5. …and the outer silent blocks of the rear lower arms…
6. …internal…
7. …and the outer silent blocks of the front lower arms.
8. Similarly, check the inner and outer silent blocks of the upper arms of the rear suspension.
9. By shaking the anti-roll bar up and down, check the anti-roll bar struts and the rubber cushions of the anti-roll bar for play.
10. Check the springs and compression buffers.
USEFUL TIP: Pay attention to the exhaust system. Extraneous knocking sounds from it are often mistaken for knocking in the rear suspension. The use of non-standard parts or a break in the muffler suspension elements can cause a strong knock, especially when revving. To check, stop the engine, carefully inspect the exhaust system, check the reliability of the fastening and suspension of the muffler. Taking the end of the exhaust pipe, swing the muffler up and down and from side to side - there should be no knocking.
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