Shock absorber disposal (BMW 3 Series E46)

Drilling locations in the shock absorber housing

Mounting the shock absorber in a vice when cutting the shock absorber body

In order for the shock absorber to be reused, it is necessary to drain the oil from it.

Under no circumstances should the oil from the shock absorber be poured out together with household waste, as this may harm the environment. Local authorities should inform about the places of reception of used oil.

The gas pressure in the shock absorber is up to 25 bar. Therefore, when opening the shock absorber, fence off the work area and be sure to put on protective glasses.

The shock absorber can be opened in two ways: by drilling it or by sawing it.

Drilling the shock absorber

1. Clamp the shock absorber removed from the vehicle vertically in a vice with the rod facing down.

2. Drill a Ø3mm hole at point A of the shock absorber outer shell.

Gas filled shock absorbers will leak gas after the first wall of the pipe has been drilled. Keep the safety distance. Continue drilling further to the inner pipe (approximately 25 mm).

3. Drill another Ø6mm hole at point B to create a hole in the inner pipe.

4. Hold the shock absorber over a container and squeeze out the oil by moving the rod in different directions to the full extent of the stroke.

5. Allow the oil to drain completely.

6. Dispose of the shock absorber as normal metal.

Cutting the shock absorber

1. Clamp the shock absorber strut in a vice.

2. Install a pipe cutter, such as Stahwille Express 150/3, and cut the outer pipe.

When the shock absorber is filled with gas, gas escapes.

3. Raise the rod. At the same time, hold the inner pipe with a gas wrench and press it down so that when the rod slowly extends, it remains in the outer pipe.

4. Remove the stem from the inner tube.

5. Place the shock absorber over a container and drain the oil completely.

6. Dispose of used oil in accordance with established regulations.