Crackling when pressing the break pedal

StefanJ · 08-14-2019, 03:30 PM

I agree with all of you.

More off that, it was not just a mechanic. It is a service (a big garage) who pretend too have a great expertise in BMW cars.

But it seems they are not so specialists as they pretend to be.
I hope to be solved and not to hear any other noises tomorrow or next days.

Thank you all for your suggestions.

adi555 · 08-15-2019, 05:42 PM

Quote:

Originally Posted by StefanJ

Quote:

Originally Posted by Skyline2.0

My comments are based solely on brake jobs completed on different vehicles. I haven't gone through the procedure for the X1 yet, but I'm assuming a lot of it will be similar to past experiences.

Did you check the rubber boot around the brake piston? Make sure it's not pinched. Air may have gotten under the rubber boot around the piston and could be causing rubbing/noise issues.

Are all contact points lubricated? I know you mentioned guide pins were done, but make sure all other points of contact have lubrication (except friction material face, of course). For example, the edges of brake pad touching brake hardware, face of brake piston, ears on brake caliper, all areas on the backs of each pad touching the caliper, etc.

Did you change your brake fluid? Your issues may be hydraulic in nature, meaning it's a possible issue with the fluid or brake lines.

Were the brake pads bedded properly? It may be too late at this point to address this issue, but certain brake pads need to go through a bedding procedure (i.e., multiple hard/soft stops in a row right after replacement).

Just a few other diagnostic ideas to explore. I hope you track down this noise problem. Consider uploading a video of the noise to give us a better idea, as I'm unclear what "brake crackling" sounds like.

Skyline, thank you for your reply.
I'm attaching a zip file with a mp3 file.
It is a recording of the crackling noises, witch can be heart from 02 to 05 second.
The first noise is the shutting door, then the noises when break pedal pressed, then the engine start.

Now, to answer to your questions:
I don't know if they checked the rubber boot around the brake piston.
No, they didn't lubricate anything. They told me they do not agree to apply lubricant there (I think they are stupid).
No, the brake fluid is not changed yet.
I don't know if the brake pads were properly bedded, but I think it was done, because the car is breaking properly.

What do you think about the noises from the attached file?

I can't see any zip file. Could you please send it again so that I can compare it with mine

StefanJ · 08-16-2019, 12:47 AM

Quote:

Originally Posted by adi555

I can't see any zip file. Could you please send it again so that I can compare it with mine

The attachment is there, please see post #10 from 13.08.2019

08-14-2019, 03:30 PM	#23
StefanJ Second Lieutenant 68 Rep 240 Posts Drives: BMW X3 G01 xDrive 20d Join Date: Mar 2019 Location: Romania iTrader: (0)	I agree with all of you. More off that, it was not just a mechanic. It is a service (a big garage) who pretend too have a great expertise in BMW cars. But it seems they are not so specialists as they pretend to be. I hope to be solved and not to hear any other noises tomorrow or next days. Thank you all for your suggestions.
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