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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 10-08-2009, 06:16 AM   #21
chriskuta
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I read the TIS and answered my questions thanks It seems from the TIS that the cavity foam is only there to seal the channel at each end for the structural foam.
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Old 10-08-2009, 07:30 AM   #22
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thanks for the cool pics and the informative post
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Old 10-08-2009, 03:26 PM   #23
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Originally Posted by chriskuta View Post
I read the TIS and answered my questions thanks It seems from the TIS that the cavity foam is only there to seal the channel at each end for the structural foam.
That's right
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Old 10-10-2009, 08:27 PM   #24
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Awesome!

Another alternative when using the TMS kit would be to DIY the epoxy reinforcements on the bottom, and then take your car to a pro to weld up the inside of the trunk. I'm extremely mechanical and have no issue with the mechanics of things, but I've never welded in my life. Then no need to fuss over the foam and tools needed for that.
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Old 11-20-2009, 11:09 AM   #25
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Or you could buy the plates pull your subframe and have a mobile welder do the welding for you.

I don't care how strong your epoxy is. Something that can rip the metal frame sure as hell can shift those plates and probably make them useless

Last edited by bimmer07; 11-20-2009 at 12:49 PM.
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Old 11-25-2011, 09:39 PM   #26
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Bump for great thread , so if you're doing both then i guess there would be no need to inject foam into hole #2 ?
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Old 02-24-2012, 11:56 PM   #27
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Sorry to bump an old thread, but what is the difference b/t cavity foam and structural foam?
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Old 02-26-2012, 05:19 AM   #28
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Sorry to bump an old thread, but what is the difference b/t cavity foam and structural foam?
Cavity foam is a light filler normally used for acoustic dampening. Structural foam is a two part high strength rigid filler designed to fill and expand to reinforce.

In the case on the subframe the cavity foam is just used to plug each end of the small chambers where the subframe mounts are welded in. So when you inject the structural foam it fills and expands in the area that requires strengthening.
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Old 03-21-2012, 05:02 PM   #29
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Another bump...

Anyone in the US buy the cavity foam and structural foam? My normal parts places can't get it. Tischer said they aren't able to get it, either. They said BMW doesn't want to sell it unless you're having the work done.
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Old 03-21-2012, 06:14 PM   #30
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You can find much more info here:
http://www.m3forum.net/m3forum/showthread.php?t=287849
http://www.m3forum.net/m3forum/showthread.php?t=251279
http://www.m3forum.net/m3forum/showthread.php?t=152000

The possible replacements for those foams are also discussed in these topics. BTW, try to ask Mike from www.thebmwpartstore.com, maybe he can get it for you. Also may try www.bmwmercedesparts.com. Let me know what you find, as I am planning to do this as well.

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Old 03-21-2012, 06:22 PM   #31
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BTW, www.thebmwpartstore.com has the structural foam, p/n 83-19-0-445-721 listed for $152, and www.bmwmercedesparts.com for $129. Contact both and ask if it is true or not (since it still might be not available).

Added: http://ebmwparts.com has it for $127.

Last edited by Nervous; 03-21-2012 at 11:20 PM.
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Old 03-24-2012, 02:01 PM   #32
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Just to let you know that Audi sell the 2 part epoxy foam for about half the price of the BMW dealers (in the UK anyway!)

Audi use the same stuff for the RS4 battery tray in the spare wheel well which is known for cracking. BMW quoted me 170 for the stuff but Audi is 95 So essentially you can repair both sides for half price.

The part number of the Audi branded stuff is D 506 110 A3
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Old 02-13-2013, 01:59 PM   #33
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Thread bump for good info

So if I'm not mistaken, the TMS plates are placed between the subframe and the differential carrier to distribute the load, yeah? The diff MUST be taken out to have the kit installed?
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Old 08-19-2013, 02:51 PM   #34
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Great DIY Jeppe! For some reason the pictures are not visible in the DIY anymore. Any clue why? Would need the FULL DIY with pictures as I need to glue the Turner plates next weekend. If anyone has the full DIY WITH the pictures as per the original post by Jeppe, please distribute. Thanks
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Old 08-19-2013, 03:15 PM   #35
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why don't you call Turner and ask them about glueing in the reinforcement plates, follow up letting us know what they say about that method.
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Old 08-21-2013, 12:34 AM   #36
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Good point Jason, I got the following reply from Turner: "Thank you for touching base regarding the subframe reinforcement for your M3. WE DO NOT RECOMMEND USING EPOXY, therefore do not have instructions for such."
Back to the starting point... Would be great if someone saved the original post from Jeppe including the pictures.
Thanks
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Old 12-18-2013, 03:32 PM   #37
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Pictures up again, sorry I changed the web server.

The epoxy method is still good after 4 years, hundreds of hard laps at the track, 40.000km on bad Norwegian roads and 500hp and SMG always in fastest settings.
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Old 12-18-2013, 06:39 PM   #38
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^^^ Nice!
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