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Hi Guys, I have a problem here and need help and advice.
I have just changed my R56 MCS Front Brake pad to orginal Perforated Disc and Disc pad. Rear Brake pad.
After changing it, i feel that my brake is quite spongy.I have to depress the padel quite deep to get the brake in.. Isit normal? Is there any run-in i have to do after a new pad change?
Did you make sure to check the brake fluid afterwards? On my R53, I would have to remove some brake fluid from the reservoir to compensate for the new pads which would've been thicker than the worn pads. Otherwise, as I compress the calipers, the back pressure along the line would cause the reservoir to overflow (yep, done that, too!) A spongy pedal could be caused by a low fluid level or, more unlikely, air in the brake line. Hope this helps.
1. ) check that you have the proper brake fluid in the system. However, it sounds like air is in the system. 2.) Fluid level ok? then bleed the breaks with a bleeder, or a catch can and an assistant pumping your breaks while you open each bleeder valve on the brakes. Start with the bleeder valve furthest from brake resovier/cylinder, open the bleeder a tiny bit, have someone pump the brake until just brake fluid comes out. If only brake comes out close and move to the next furthest bleeder valve until the one with air bubbles out. Repeat for all four corners of your car. Be really careful not to over tighten the bleeder valves. the break really easily. Top off brake fluid as necessary. When your done you pedal will be hard!
Hi guys, Thank you for your response. =) I checked the brake fluid reservior. It's filled to the top and overflown abit. i try to take some out, and after travelling like 100km, My brake starts to behave better. As in, the spongy effect improves now.
Here comes another problem. I think the rear brake is over tightened. When i free clatch and let the car roll alittle bit and it will stop with a light jerk!! Which means that the brake pad is too tight to my disc? Isit normal? OMG...seems like alot of problem. =000
Taking out excess fluid wouldn't have done anything about the lack of firmness in the brake pedal. I suspect what happened is the new pads and discs started to wear in and came into better contact with each other. That would increase the brake's efficiency, which could result in less apparent sponginess.
As for the dragging rears; if you had the new brakes installed for you, I'd take the car back to the shop that did the install ASAP, so they can finish the installation.
If you replaced the disks yourself, did you have to force the rear calipers back onto the new rear disks? If so, there might be a mechanical adjustment in the handbrake that's needed to compensate for the thicker discs and/or pads. I'm not familiar with operation of the MINI handbrake, so this is a guess.
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Ken G.
Luigi, 08 MCS, all MY, Tuscan Beige, English Oak, Perf pack, factory smiley ball.
Ok I guess the brake had set in abit. But I realise uneven.wear. I will take pictures and upload shortly.
And I realise the direction on the cutting on the Brakedisc. I have totally no clue weather its normal!
Let me upload some pics to illustrate it better. Should the cut go against the brake?
The dragging effect is still there. God..I have no time to travel to my mechanic at all. But the effect isn't very significant. But I got to find out what is happening..
