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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 03-12-2013, 05:58 PM
occountin occountin is offline
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Brake Squeel...How Fix?

2008, 750
I had my front brakes changed, new pads and rotors and sensor by indie.

Immediately on drive off they squeeled on right side when coming to a near stop and I drove back and indie said they need to break in.

I drove it for 2 weeks and the squeel did not stop and took back to indie to fix. They told me they beveled the pads and I drove it again. It still squeels but not as badly as before and again when it comes to a near stop.

What is fix for a brake squeel on new brakes. WIll take bacjk again to indie maybe I can be more informed about the why and the fix.

thank you for the advise
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  #2  
Old 03-12-2013, 06:53 PM
MINI+BMWtek MINI+BMWtek is offline
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If you pay premium for your brake job than go back get new oem pads. Most indye shops dont use oem pads as mark up will be too low and not competitive to market. Bosh pads is very popular among euro shops(noisy)
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  #3  
Old 03-13-2013, 01:31 PM
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Punisher745Li Punisher745Li is offline
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same thing with my brake job, they installed ceramic pads they brake really good but when the pads are cold the noise is horrible!!!
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  #4  
Old 03-15-2013, 05:41 PM
occountin occountin is offline
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I dont think they were ceramic. I know they just get a lot of their parts from the BMW dealer so I would think they were OEM pads. Ill ask them what pads they used when I call to bring it back in..again....to have them fix the squeel. Maybe insist they replace the pads.

What about just emery paper the pads surface and disk to clean off any burnishing that may have occured from debri gotten trapped in their?
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  #5  
Old 03-15-2013, 05:44 PM
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Where the pads properly bedded?
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  #6  
Old 03-15-2013, 08:37 PM
CJ745NZ CJ745NZ is offline
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The squeal is actually caused by the steel plate on the back of the pad rubbing against the face of the piston. You need to put coppercote or another high temperature grease between the two faces. If you go to a break supplier they will have the appropriate grease there.
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  #7  
Old 03-16-2013, 06:09 AM
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sounds like they used balls pads or they didnt lube the back of the pads. have they done bmw brakes before?
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  #8  
Old 03-16-2013, 06:19 AM
Ultimate745i Ultimate745i is offline
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Hey, wouldnt his brakes also squeal if the rotors are grooved or have become oxidized? (I THINK thats the word I'm looking for)
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  #9  
Old 03-17-2013, 11:07 AM
occountin occountin is offline
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I dont know if they used copper grease on the piston. But Ill ask. They are an exclusive BMW shop started by a guy who work for the BMW dealer so one would think they were competent on doing brakes.

Oxidized, or burnished Im not sure of the right word either. But I thought perhaps some material on the pad/discs burns and leaves a shiny burnt area that doesnt grab like the remainder of the surface when brakes applied.
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  #10  
Old 03-22-2013, 12:39 PM
kishdj kishdj is offline
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Quote:
Originally Posted by occountin View Post
I dont know if they used copper grease on the piston. But Ill ask. They are an exclusive BMW shop started by a guy who work for the BMW dealer so one would think they were competent on doing brakes.

Oxidized, or burnished Im not sure of the right word either. But I thought perhaps some material on the pad/discs burns and leaves a shiny burnt area that doesnt grab like the remainder of the surface when brakes applied.
I can shed some light on this subject. If anyone can, I can. I've replaced two (2) that's right, two (2) sets of rotors and pads all within a year. First, bought some middle of the road rotors and pads, then spent the long dollar and bought performance, slotted and drilled rotors and ceramic pads all to no avail. I still had the horrible squeal from my breaks!

Then I found a guy who worked for BMW in my area and who is a certified BMW technician. He said the back sides of the pads (mostly the rear pads but sometimes the front too) have to have break grease put on them where the piston meets the back of the pad. He actually didn't charge me and came over and we put the grease on the pad face (where the piston meets the pad) and along the touch points where the pad rests in the caliper cradle. Slapped them back on and VOILA! No more squealing!!! It's been fine now going on six months!!
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  #11  
Old 03-23-2013, 08:39 AM
Firecatdriverf7 Firecatdriverf7 is offline
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Have you ever noticed high performance pads have a angle to the pad on the front and rear of the pad ? And most have groves cut into the pad top to bottom? Not only for dust, and heat, but noise as well, but grease/ lube in needed as well
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  #12  
Old 03-24-2013, 06:08 PM
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Punisher745Li Punisher745Li is offline
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What do you guys think of ATE rotors?

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  #13  
Old 03-25-2013, 04:11 PM
occountin occountin is offline
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thanks for the input. Im taking the car tomorrow for them to fix the squeal..again. Ill take along your description for the copper grease. Hope they already know...ill let you know the result.
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  #14  
Old 04-28-2013, 03:56 PM
occountin occountin is offline
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Squeal Fixed

The mechanic replaced the pads. No more squeal.
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