Operation CHARM: Car repair manuals for everyone.

Rear Gas-Filled Strut, Venting and Emptying






Rear Gas-Filled Strut, Venting and Emptying

A - Venting through Drill Holes






- Secure gas-filled shock absorber vertically in a vise, with piston rod facing down.


Wear protective goggles while drilling.

- Drill a 3 mm hole - arrow A - through the shock absorber outer tube.

Gas escapes when drilling.

- Continue drilling until the tube inside is drilled through (approximately 25 mm deep).

- Drill a second hole 6 mm - arrow B - through the outer and inner shock absorber tubes.

- Hold shock absorber over appropriate container for catching oil and move piston rod repeatedly through entire stroke until no more oil flows out.

B - Open with Pipe Cutter


Wear protective goggles when drilling or sawing.

- Drill a 3 mm hole through the shock absorber outer tube or saw through the tube wall.

Gas escapes when drilling or sawing.

- Attach a pipe cutter (for example 150/3 Stahlwille Express) as shown in illustration, and cut through outer shock absorber tube.






- Pull the piston rod upward, hold the inner shock absorber tube in place with pliers and push it downward so that it remains in the outer shock absorber tube when the piston rod is slowly raised.

- Remove the piston rod from the shock absorber inner tube.

- Empty the shock absorber tube.