Technical Articles Main Menu

This page contains advice on brake bleeding on the Audi S2.

No responsisbilty is accepted for anyone attempting this procedure by following the steps contained in these pages. This is intended as a guide only and all usual precautions should be heeded when attempting work on a motor vehicle. I cannot be held responsible for any damage sustained as a result of using these instructions.

Special Note: Brake fluid is hazardous to health and will damage car paintwork if not washed off quickly.

Estimated time : ~1 hour

Tools and parts needed are as follows:

1. Brake spanner 11mm
2. Brake fluid DOT 4 (3 litres)
3. Suitable brake bleeder
4. Empty container to collect used fluid

There are many commercially available brake bleeding tools available and I'm not going to discuss the benefits of one over the other. A popular choice is the Gunson Eezibleed which uses spare tyre pressure to push fluid through the system.

Personally I use one of these. I switched over to this after 3 failures of the Gunson device in 2 years. It was imported from the USA when exchange rates were favourable and has been trouble free. Easy to use and can hold up to 1.9 litres of fluid.

The correct sequence for bleeding the brakes is as follows:

Sequence Amount of fluid which must pass through
Brake master cyl (if bleeder screw fitted)250ml per bleeder screw (if fitted)
Right Rear500ml
Left Rear 500ml
Right Front500ml
Left Front500ml

Note that if upgraded brakes are fitted and the calipers have twin bleed valves, 250ml should be bled from each valve.

Many S2s do not have a bleeder valve on the master cylinder
Attach a tube to the first bleed valve and place other end of tube in an empty container.
Attach the brake bleeder to the fluid reservoir in the engine bay
Open the bleed valve until required fluid exiting the valve has passed and is clear of air bubbles
Close bleed valve and remove tube and container
Proceed to next caliper in above sequence order until complete