Felix.

I need to change the fluid as it has become contaminated with water

Is it easier to open the bleed valves and pump the old stuff through & out before putting new fluid in.

Or

Pump the old stuff through whilst adding the new so that no air is put into the system.

I favour the first myself.....

Any thoughts

alcazar

iTrader: (2)

AFAIK, the accepted method is to keep pumping new stuff through ON TOP OF the old, until it runs clean from all four brakes.

Alcazar

RON

Yep, you'll really struggle if you pump/drain all the old out first..... just keep topping the reservoir up, and keep an eye on whats coming out.... you'll be able to tell when there's new coming though......

Normski

Yeah, option 2.

Before you start, remove as much of the old fluid from the reservoir as you can with a syringe, and fill it with the new stuff.

Xia

Use some ATE Super Blue Racing Brake Fluid Dot 4...
its blue so you replace and pump until the colour goes from yellow->green->blue. Really easy. on top of that, its a pretty decent (boiling point wise) fluid.
Next bleed, use a normal yellow fluid.