I am having issues with my newly acquired E46 M3. Its running 6 piston Brembo GT 355x32mm on the front and 4 piston Brembo GT 345x28mm.
Ever since buying the car I noticed that after drifting for a longer period (like around a roundabout) the first press of the brake pedal is very soft, like an airgap has formed between the discs and pads. Otherwise when driving normally, the pedal feel is very firm.
Also when driving on track days after hard cornering on semi slicks, the first pedal apply has a very long travel, when applied very quickly, the rear axle seems to go into EBD way before the FA even bites.
For me all signs point to an airgap or air bubble in the front axle.
My first thought was air in the system
--> This seemed to improve the situation somewhat but the pedal travel is still quite long until it becomes firm after drifting. I haven't had the chance to test the new wheel bearings on track yet.
Does anybody have an idea what else could be causing this issue? With the engine off the Pedal is firm and does not slowly depress, meaning the master cylinder should be ok right?
Ever since buying the car I noticed that after drifting for a longer period (like around a roundabout) the first press of the brake pedal is very soft, like an airgap has formed between the discs and pads. Otherwise when driving normally, the pedal feel is very firm.
Also when driving on track days after hard cornering on semi slicks, the first pedal apply has a very long travel, when applied very quickly, the rear axle seems to go into EBD way before the FA even bites.
For me all signs point to an airgap or air bubble in the front axle.
My first thought was air in the system
- I bled the system with a power bleeder connected to the reservoir --> this didn't make a difference
- After that I again bled the system, but this time running the DSC bleeding procedure --> Still no difference
--> This seemed to improve the situation somewhat but the pedal travel is still quite long until it becomes firm after drifting. I haven't had the chance to test the new wheel bearings on track yet.
Does anybody have an idea what else could be causing this issue? With the engine off the Pedal is firm and does not slowly depress, meaning the master cylinder should be ok right?
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