Hi guys - I recently changed my front brakes - I have put on grooved discs and greenstuff pads, I have bedded them in as instucted and have now done approx 1000 miles on them - when I changed the brakes I also changed the fluid - used the normal dot 4 alfa stuff - on thursday night I experienced really bad brake fade and ever since then the pedal has been very spongy and the brakes not as keen as they were prior to thursday. It is probably also worth mentioning that there is some residue on the brake pedal which appears to be brake fluid - same colour, texture and dare I say taste !!! (stupid I know) has anybody any ideas - is there anyway the fluid could be leaking at the top of the pedal and if there is a leak then that surley means air could get in which could cause a spongy feel - I have checked the brake fluid level and it seems fine apart from that I dont know what to do, dont know how the brakes are set up on the 156 - help appreciated asap on this one - thanks.
This sounds weird. If your master cylinder is leaking brake fluid, it'll have to pass through the brake booster. I have seen it a few times, but it's really rare. Most of the time, brake fluid leaking into the booster get's sucked into the intake manifold through the vacuum pipe, causing white smoke coming out of the tailpipe. Have your dealer check it out ASAP.
Alfa reckon it maybe the servo???? as there is residue inside the car !! It is going back in again on Saturday am to see if they can get to the bottom of it - always reassuring isnt it !!!
ps - does anybody else have any views on greenstuff pads - should I change them ??
If the servo has conked out, it would explain all your symptoms....
Greenstuff are certainly OK for lightweight cars -Seven style kits and things like 205s/AXs. Not sure on a big hefty bruiser like a 156, but unless you are doing track work, I wouldn't worry. I think your sudden fade is probably due to air getting into the system, and the sponginess is because it has stayed there.
Get it checked ASAP!!
If there is brake fluid leaking from the system you need to get it checked ASAP - you could get sudden and complete brake failure if you lose too much fluid. And not only for the safety reasons but also brake fluid strips paint.
If you are considering other pads go for Ferodo DS2000 - fantastic pads.
Rather you than me old luv!
Can't you borrow something else??
The pressure inside a braking system is huge. If there's a leak, there's a weak point. If a 3 series with no badge and one small exhaust pipe pulls out in front of you, you need to know you are going to stop....