Clutch exploded

Gokyo · 11-27-2018, 08:49 AM

2008 e90 M3

Something broke apart inside the bell housing. It tore apart my pressure plate, friction disk and parts of the fly wheel are broken off.

It also killed the position sensor.

Some piece of metal got spun around on the inside of the bell housing and left some gouges in the inside bottom of the bell housing and then finally exited by punching a 1/2 hole in the top of bell housing.

Putting in a new clutch kit seems like no big deal. Replacing the sensor also not a big deal.

What I am struggling with is should I just smooth out the gouge in the inside bottom of the bell housing and just put some JB Weld in the hole and call it a day.

Or should I have the gouged TIG welded and ground down and the hole filled.

I worry that the gouge and hole might be the starting point of some future stress crack. I am not really sure what kind of forces are acting on the bell housing.

I also worry that if I have it welded that might in itself create a weakened area.

Anyone have some thoughts about this?

pbonsalb · 11-27-2018, 09:51 AM

What year car, out of curiosity? A few people with 2008 models have posted about broken clutches.

I would have the bell housing tig welded and would not worry.

Aktavate · 11-27-2018, 12:54 PM

Related thread https://www.m3post.com/forums/showthread.php?t=1342757

amrazM · 11-27-2018, 05:21 PM

New gearbox, the housing has been compromised.

deansbimmer · 11-27-2018, 08:23 PM

We see these occasionally.

Transmissions are cheap for these. Unless you have a skilled welder in your employ it makes better sense to just replace it.

Gokyo · 11-28-2018, 12:12 AM

Quote:

Originally Posted by deansbimmer

We see these occasionally.

Transmissions are cheap for these. Unless you have a skilled welder in your employ it makes better sense to just replace it.

What ? Where can I get a 6 speed tranny cheap?

deansbimmer · 11-28-2018, 07:30 AM

Quote:

Originally Posted by Gokyo

What ? Where can I get a 6 speed tranny cheap?

$600-1900 ebay..forums..craigslist..car-parts..wherever. Having a truly skilled welder repair it properly would cost many hundreds and I probably still wouldn't trust their work. Quality work is a lost art these days.

11-27-2018, 08:49 AM	#1
Gokyo Registered 0 Rep 3 Posts Drives: e90 m3 Join Date: Nov 2018 Location: PNW iTrader: (0)	Clutch exploded 2008 e90 M3 Something broke apart inside the bell housing. It tore apart my pressure plate, friction disk and parts of the fly wheel are broken off. It also killed the position sensor. Some piece of metal got spun around on the inside of the bell housing and left some gouges in the inside bottom of the bell housing and then finally exited by punching a 1/2 hole in the top of bell housing. Putting in a new clutch kit seems like no big deal. Replacing the sensor also not a big deal. What I am struggling with is should I just smooth out the gouge in the inside bottom of the bell housing and just put some JB Weld in the hole and call it a day. Or should I have the gouged TIG welded and ground down and the hole filled. I worry that the gouge and hole might be the starting point of some future stress crack. I am not really sure what kind of forces are acting on the bell housing. I also worry that if I have it welded that might in itself create a weakened area. Anyone have some thoughts about this? Last edited by Gokyo; 11-27-2018 at 09:55 AM..
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11-27-2018, 09:51 AM	#2
pbonsalb Lieutenant General 5234 Rep 10,616 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	What year car, out of curiosity? A few people with 2008 models have posted about broken clutches. I would have the bell housing tig welded and would not worry.
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11-27-2018, 12:54 PM	#3
Aktavate Second Lieutenant 246 Rep 270 Posts Drives: Red Join Date: May 2017 Location: Reno / SFBA iTrader: (0) Garage List 2011 E90 M3 [0.00] 2002 911 Turbo [0.00]	Related thread https://www.m3post.com/forums/showthread.php?t=1342757
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11-27-2018, 05:21 PM	#4
amrazM mTekMods 2143 Rep 2,902 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	New gearbox, the housing has been compromised.
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11-27-2018, 08:23 PM	#5
deansbimmer BimmerPost Supporting Vendor 3751 Rep 2,907 Posts Drives: 2011 E93 M3 Join Date: Nov 2014 Location: DFW, Texas iTrader: (17) Garage List 1988 BMW M3 [0.00] 2013 BMW M3 [0.00] 2011 X5M [0.00] 2011 BMW M3 [0.00]	We see these occasionally. Transmissions are cheap for these. Unless you have a skilled welder in your employ it makes better sense to just replace it.
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