Join Date: Dec 2005
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Yep,you need to bleed the air from the hydraulic system.
There should be a bleed nipple on each caliper.The easiest way to bleed them is to have someone inside the car to pump the peddle whilst you undo and tighten the nipple(oo-er missus!).
Get the front wheels off and support the car on axle stands.Starting at the caliper furtherest away from the reservoir/master cylinder,make sure the reservoir is topped up,and ask the person in the car to press the brake peddle down as far as it goes and to keep pressure on it.You then slowly undo the nipple half a turn,and you'll see fluid and air escaping.Have a cloth ready to mop up the fluid!.Once the pedal has gone right to the floor,do the nipple up.Ask the other person to release the pressure on the pedal and let it return to it's up position.Repeat this until you can't see or hear any air escaping and when you have constant fluid running out when the pedal is pushed down.You must remember to do the nipple up before the pedal is released,otherwise it will draw in air though the nipple and you'll be back to where you started!.It usually only takes 4 or 5 pumps to bleed a caliper....
Make sure the fluid is always topped as if you run the reservoir dry,you'll have to bleed the complete system.If you have ABS,make sure the ignition is switched off when you bleed the brakes as it can damage the ABS pump if you don't.Once you bleed the brakes,make sure there are no leaks with pressure applied to the pedal.
IF YOU ARE IN ANY DOUBT,GET THE BRAKES LOOKED AT BY SOMEONE WHO KNOWS WHAT THEY ARE DOING.Please,don't take any chances with your brakes.
I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo
Last edited by Lagdti; 11th October 2007 at 08:03 PM.