2002 E46 m3... Weird "bump" sound when pressing clutch

2002E46M3_87 · Sun, Jul-22-2012, 04:34:06 PM

What's up guys. I recently noticed an annoying "feel" and "sound" in my clutch when it is depressed. I took it to BMW of Rockville last week and, they said my clutch master cylinder was leaking everywhere so they replaced that. When master cylinders are replaced don't they usually replace the slave cylinder too?
Anyway, the "feel" and "sound" has not been taken care of. When I press the clutch in after I haven't driven it for a while, about half way through or so I hear a slight bumping sound and feel a slight bump as well. The car can either be off, at idle, or at speeds below 10 mph and I still hear it. It gets less and less as I drive the car, and after a half hour or so when the car is warmed up, it won't do it anymore, even at idle.
Other then this annoying "sound" and "feel" the clutch works fine. No problems switching through gear and it engages and disengages fine. Anybody have this problem or know what it is? Mechanics opinions def welcome...

*I'll try to post a Video for you guys for further diagnosis. Thanks!

2002E46M3_87 · Sun, Jul-22-2012, 05:02:33 PM

clutchvid.mp4 video by rcibula1 - Photobucket

" title="clutchvid.mp4 video by rcibula1 - Photobucket" target="_blank">clutchvid.mp4 video by rcibula1 - Photobucket

2002E46M3_87 · Sun, Jul-22-2012, 05:03:04 PM

Turn your volume up, it's hard to hear. thanks!

2002E46M3_87 · Sun, Jul-22-2012, 10:55:40 PM

Nobody has a reply or any idea????

kidrobot · Sun, Jul-22-2012, 11:25:39 PM

Sounds similar to what I had. One day out of the blue the clutch started making a popping/squeaking sound in conjunction with a faint 'pop' in the clutch pedal's feel. What I think it is is the pivot fork inside the tranny, or something around that area. I took my slave cyl off, sprayed some lithium grease as best I could towards that area, and it seems to have helped.

PS. your sig is a bit massive

2002E46M3_87 · Mon, Jul-23-2012, 04:39:18 AM

haha yea it is... i'll have to fix that. Thanks for your input.

**deilenberger** · Mon, Jul-23-2012, 03:19:16 PM

Fix the sig photo.

And try putting your head down near the pedal and depress it with your hand. If the noise appears to come from the top of the pedal, chances are the pivot point is the problem. Spraying some grease on it may help. Replacing the pedal will help. Putting a aftermarket bushing in it (vendors sell these) will help both the noise and the feel. It's a crappy plastic pedal rotating on a poorly fitted plastic bushing on a steel pin. Guess what's gonna wear?

**Status Gruppe Tuning** · Tue, Jul-24-2012, 12:23:01 AM

The noise can be caused by Air in the system.. I had the same problem.. even after replacing the Clutch Master and Slave along with new bushings and a SS line I was still hearing the noise.. ( sooo Anoying ) so after 3 attempts at bleeding the manual way and with a power bleader. I read somewhere to just keep pumping the pedal while the car is on and at light and such and after about a day of driving and pumping the clutch at ever stop light it finally went away..
Mike Migs

2002E46M3_87 · Fri, Aug-03-2012, 02:34:15 AM

I think I need to replace the slave cylinder... I installed rogue engineering clutch pedal bushings today and while I was in there I pressed the clutch and It sounded like it was coming from the slave or somewhere behind the firewall..

Sun, Jul-22-2012, 04:34:06 PM	#1
2002E46M3_87 2002E46M3_87 Join Date: Jul 2012 Age: 25 Posts: 46 In the garage: '02 BMW ///M3 Reputation: 0 Location: Germantown	2002 E46 m3... Weird "bump" sound when pressing clutch What's up guys. I recently noticed an annoying "feel" and "sound" in my clutch when it is depressed. I took it to BMW of Rockville last week and, they said my clutch master cylinder was leaking everywhere so they replaced that. When master cylinders are replaced don't they usually replace the slave cylinder too? Anyway, the "feel" and "sound" has not been taken care of. When I press the clutch in after I haven't driven it for a while, about half way through or so I hear a slight bumping sound and feel a slight bump as well. The car can either be off, at idle, or at speeds below 10 mph and I still hear it. It gets less and less as I drive the car, and after a half hour or so when the car is warmed up, it won't do it anymore, even at idle. Other then this annoying "sound" and "feel" the clutch works fine. No problems switching through gear and it engages and disengages fine. Anybody have this problem or know what it is? Mechanics opinions def welcome... *I'll try to post a Video for you guys for further diagnosis. Thanks! __________________ Black housing turn signals, black and white emblems all the way around inc. "///M" wheel sticker, Rogue Engineering clutch pedal bushings, Bimmian painted reflectors (not in pic), Megan racing polished tip axle back exhaust

Sun, Jul-22-2012, 05:03:04 PM	#3
2002E46M3_87 2002E46M3_87 Join Date: Jul 2012 Age: 25 Posts: 46 In the garage: '02 BMW ///M3 Reputation: 0 Location: Germantown	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch Turn your volume up, it's hard to hear. thanks! __________________ Black housing turn signals, black and white emblems all the way around inc. "///M" wheel sticker, Rogue Engineering clutch pedal bushings, Bimmian painted reflectors (not in pic), Megan racing polished tip axle back exhaust

Sun, Jul-22-2012, 10:55:40 PM	#4
2002E46M3_87 2002E46M3_87 Join Date: Jul 2012 Age: 25 Posts: 46 In the garage: '02 BMW ///M3 Reputation: 0 Location: Germantown	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch Nobody has a reply or any idea???? __________________ Black housing turn signals, black and white emblems all the way around inc. "///M" wheel sticker, Rogue Engineering clutch pedal bushings, Bimmian painted reflectors (not in pic), Megan racing polished tip axle back exhaust

Sun, Jul-22-2012, 11:25:39 PM	#5
kidrobot Unregistered User Join Date: Jan 2010 Posts: 1,310 Reputation: 0 Location: Florida	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch Sounds similar to what I had. One day out of the blue the clutch started making a popping/squeaking sound in conjunction with a faint 'pop' in the clutch pedal's feel. What I think it is is the pivot fork inside the tranny, or something around that area. I took my slave cyl off, sprayed some lithium grease as best I could towards that area, and it seems to have helped. PS. your sig is a bit massive __________________ ///Alita VF 570 - NickG of Technique Tuning

Mon, Jul-23-2012, 04:39:18 AM	#6
2002E46M3_87 2002E46M3_87 Join Date: Jul 2012 Age: 25 Posts: 46 In the garage: '02 BMW ///M3 Reputation: 0 Location: Germantown	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch haha yea it is... i'll have to fix that. Thanks for your input. __________________ Black housing turn signals, black and white emblems all the way around inc. "///M" wheel sticker, Rogue Engineering clutch pedal bushings, Bimmian painted reflectors (not in pic), Megan racing polished tip axle back exhaust

Mon, Jul-23-2012, 03:19:16 PM	#7
deilenberger Moderator Join Date: Dec 2004 Posts: 13,329 Reputation: 578	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch Fix the sig photo. And try putting your head down near the pedal and depress it with your hand. If the noise appears to come from the top of the pedal, chances are the pivot point is the problem. Spraying some grease on it may help. Replacing the pedal will help. Putting a aftermarket bushing in it (vendors sell these) will help both the noise and the feel. It's a crappy plastic pedal rotating on a poorly fitted plastic bushing on a steel pin. Guess what's gonna wear? __________________ Don Eilenberger AKA bellymeisterburgermeister and denilegiiiiiiiiiiiiibennnnegerieragher (but that's misspelled..) 2001 M-Coupe - TiSilver/Black - Das Boot.. 2002 M3C/6 - Imola Red/Black - SOLD 2003 525iT - Green/Tan - SOLD - replaced with Lexus 2006 Cayenne/S - Iceland Silver Metallic/Stone-steel Gray - Truckster. 2007 R1200R - Roadster, black mit/white pinstripes - the REAL BMW.. 2011 Lexus RX-350. SWMBO's new toy.

Tue, Jul-24-2012, 12:23:01 AM	#8
Status Gruppe Tuning M3Forum Sponsor Join Date: Feb 2011 Posts: 1,663 Reputation: 0	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch The noise can be caused by Air in the system.. I had the same problem.. even after replacing the Clutch Master and Slave along with new bushings and a SS line I was still hearing the noise.. ( sooo Anoying ) so after 3 attempts at bleeding the manual way and with a power bleader. I read somewhere to just keep pumping the pedal while the car is on and at light and such and after about a day of driving and pumping the clutch at ever stop light it finally went away.. Mike Migs __________________ Mike Migs Status Gruppe Tuning 10801 Vista Sorrento Parkway San Diego, CA 92121 P. 619-887-6006 E. Info@statusgruppe.com W.StatusGruppe.com Like us on Facebook!

Fri, Aug-03-2012, 02:34:15 AM	#9
2002E46M3_87 2002E46M3_87 Join Date: Jul 2012 Age: 25 Posts: 46 In the garage: '02 BMW ///M3 Reputation: 0 Location: Germantown	Re: 2002 E46 m3... Weird "bump" sound when pressing clutch I think I need to replace the slave cylinder... I installed rogue engineering clutch pedal bushings today and while I was in there I pressed the clutch and It sounded like it was coming from the slave or somewhere behind the firewall.. __________________ Black housing turn signals, black and white emblems all the way around inc. "///M" wheel sticker, Rogue Engineering clutch pedal bushings, Bimmian painted reflectors (not in pic), Megan racing polished tip axle back exhaust

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