- Prolonged oscillation of the body during uneven roads.
- Shaking of the body during successive bumps in the road.
- The bouncing of the wheels is also on a flat road.
- Vehicle jerking when braking (may also have other causes).
- Danger when turning due to insufficient longitudinal stability, vehicle skidding.
- Rumbling noises while driving.
- Uneven tire tread wear.
The shock absorber can be checked by hand. However, an accurate test of the ability of the shock absorber installed on the vehicle to receive the load is possible only with the help of a diagnostic tool, and the shock absorber removed from the vehicle - on the shock absorber test stand.
Manual check
Remove shock absorber.
![](https://www.bmwman.ru/img/ser5/1823.jpg)
Holding the shock absorber in the mounting position, stretch it at least three times and then compress it. During the entire stroke, the shock absorber piston rod should move evenly and heavily and without jerks. In addition, there should be no unusual noises.
Push the piston rod fully in and then release. The stem should extend again at a uniform speed.
Minor traces of oil on the shock absorber with its perfect operation are not grounds for replacing the shock absorber.
If there is a significant loss of oil, the shock absorber should be replaced.
Install shock absorber.
Shock Absorber Disposal
In order for a defective shock absorber to be recycled, it must be drained of oil and handed over to a special waste collection point. The empty shock absorber can then be handed over as normal scrap metal.
Before disposing of the shock absorber, oil is removed from it as follows.
![](https://www.bmwman.ru/img/ser5/1824.jpg)
Clamp the removed shock absorber in a vise vertically with the piston rod down.
At a distance of about 20 mm from the base of the pipe, drill a hole with a diameter of 3 mm in the outer wall to release the gas. The gas removed is colorless, odorless and non-toxic.
At a distance of about 80 mm from the base of the pipe, drill a second hole with a diameter of 5 mm to drain the oil.
Hold the shock absorber over the container and, by repeatedly moving the piston rod in both directions, squeeze the oil out of the shock absorber at full speed.
Attention: The oil in the shock absorber should never be simply dumped on the ground or thrown away with normal household waste. Shock absorber oil is mineral oil and should be taken to a waste engine oil collection point.