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Old 02-24-2015, 09:44 PM   #1
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Cry No more inexpensive 1150 Clutch slaves

http://www.beemerboneyard.com/21522335061n.html
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Old 02-25-2015, 05:56 AM   #2
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Out of stock, no longer available ?
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Old 02-25-2015, 06:40 AM   #3
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From the bottom of the page:
DUE TO THE RECENT LAWSUIT BROUGHT BY BMW AGAINST MAGURA, ONCE OUR CURRENT STOCK OF MAGURA PRODUCTS IS GONE WE WILL NO LONGER BE ABLE TO SELL ANY BMW SPECIFIC MAGURA PRODUCTS.
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Old 02-25-2015, 07:20 AM   #4
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So, once the current stock is gone, what recourse do BMW owners have regarding a replacement slave assembly should one be needed?
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Old 02-25-2015, 07:22 AM   #5
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So, once the current stock is gone, what recourse do BMW owners have regarding a replacement slave assembly should one be needed?
OE from BMW only
And BTW the current BB stock is gone.
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Old 02-25-2015, 07:26 AM   #6
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What's the lawsuit all about?
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Old 02-25-2015, 07:32 AM   #7
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No have 1150-- what wears on those slaves? Seal and piston or just seals? Seems like aftermarket could step in to make those and an o-ring source found. Over-worn cylinders could be sleeved as well.

It's the same deal w/ the Magura 1100 master cylinders that are dealer-only now-- clever machinists and folks who refuse to pay full BMW retail can make this happen.
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Old 02-25-2015, 07:34 AM   #8
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What's the lawsuit all about?
Not sure but I suspect it is for Magura selling direct and not thru BMW.
From what I understand if a part is specifically developed/made for BMW, it may only be sold to them.
I ran into this twice trying to buy direct.
First time for an AMP connector, the second for the little INA bearing on the slave piston.
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Old 02-25-2015, 07:43 AM   #9
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No have 1150-- what wears on those slaves? Seal and piston or just seals? Seems like aftermarket could step in to make those and an o-ring source found. Over-worn cylinders could be sleeved as well.

It's the same deal w/ the Magura 1100 master cylinders that are dealer-only now-- clever machinists and folks who refuse to pay full BMW retail can make this happen.
The failure starts by the little bearing going dry and the piston spinning.
The bore scores and the rest is history.
The bearing is not available for public purchase, I have sourced and been told only BMW may purchase.
The seals are available - Data Cata has them IIRC.

This leads to my suggestion of lubing these every 40k or so. I have done mine and is the original @ 170k miles
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Old 02-25-2015, 07:58 AM   #10
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I wonder if that little bearing could be made of Nylatron?

if the seal is available, and the bore is smooth, they could be rebuilt indefinitely right?
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Old 02-25-2015, 08:09 AM   #11
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I wonder if that little bearing could be made of Nylatron?

if the seal is available, and the bore is smooth, they could be rebuilt indefinitely right?
Interesting idea
The small diameter of the pushrod end would exert tremendous point pressure on the nylatron. Also the pushrod is spinning all the time, up to 7500 rpm!
Melting might occur?
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Old 02-25-2015, 08:11 AM   #12
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That is possible, I have never worked on an 1150, so I am not fully aware of the design of the slave cylinder.

plug some numbers into this and see if it might be possible?

http://www.vesconite.com/design/bush...lldesigns2.htm
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Old 02-25-2015, 08:16 AM   #13
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Originally Posted by mouthfulloflake View Post
That is possible, I have never worked on an 1150, so I am not fully aware of the design of the slave cylinder.

plug some numbers into this and see if it might be possible?

http://www.vesconite.com/design/bush...lldesigns2.htm
The OD of the rod is about 3/8", there is a 1/4" locating dimple on the end.
Not much surface area to work with.
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Old 02-25-2015, 08:35 AM   #14
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ahh ok, it might be a no go then.
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Old 02-25-2015, 09:02 AM   #15
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VW 020 transmissions used very similar setup to the BMW with the throwout bearing that looked like this. Clutch was not hydraulic and the lever would press on the flat part. You can see where the pushrod goes, but the bearing is way bigger than BMW's
Engines were similar power to the BMW oilhead.



But then we would have to redesign the whole slave cylinder to fit, and there is no room.
BMW just wanted to get by with minimum effort in transitioning to the hydraulic clutch. I have never seen a throwout bearing that small on anything else other than BMW. Maybe it would be more reliable long term to design cable setup for it. I am thinking lot of these will be alive in 20-30 years. BMW's have tendency to stick around.

Just throwing stuff out there, dont hurt me.
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