brakes
 

i recently changed the front pads i was wondering if i need to bleed it still. coz for some reason now my master cylinder in now leaking some fluid..

if all you did was pads and didnt disconnect the caliper from the flex hose or anything then no, you dont need to bleed it. did you press the picton back into the caliper before re-installing? is there any leaks from the flex hoses/ calipers or is it directly from the master cylinder? more than likely non-related

You master was probably on its way out. When pushing the piston in, it started leakin.

Could u or someone elese have topped up the brake fluid, when your pads ware the caliper pistion stays extened and your brake fluid level drops a little (somewhere between the min and max). If u keep topping up the brake fluid throughout the life of the pads you mave have casued the master to overflow when u pushed back the caliper pistion. I have done this on my old 90 coroall winter beater.

^Had the same thought...


And no. you don't have to bleed, if all you did was replace the pads.

what makes you think the master is leaking? pics if leak is external, or symptoms if no visible leak is present.

If you changed just pads, why would brake fluid be involved at all?

It shouldn't be, however if his old pads were very worn and his brake fluid resevoir was full, he would have to push the caliper piston back into the caliper to get the new, thicker pads in, causing the fluid resevoir to overflow from the added fluid being forced back into it.

All the messing around with forcing fluid back into the resevoir (from pushing the piston back in) and stepping on the brake pedal repeatedly to seat the pads (or bleed them, if you were doing that) probably fudged the old seal in the master cylinder. Had that happen to me before too! If you're going to replace the master cylinder you should change the slave cylinder at the same time (because usually they have about the same life expectancy), plus they aren't that expensive if you shop around.

picture of brake slave cylinder?

oooppssss my bad! haha

I'm thinking clutch not brake

lol that's why I asked... technically the caliper is the slave in a brake setup.

Thanks for the clarification :wink:....sorry OP!