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Old 02-08-2015, 06:56 AM   #1
undecidead
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E46 Rear Subframe!

Hey guys, I recently discovered that there are common subframe issues in the E46.

I have a 323i produced in January 2000 and I am now planning on getting a reinforcement kit welded in as a preventative measure.

There are a couple of things, can you install a reinforcement kit on an un-cracked subframe and what is the average cost for installing this kit.

Thankyou to anyone with help.
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Old 02-09-2015, 07:28 PM   #2
the521one
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Yes you can install on the body that has not been cracked. This is actually better because you are strengthening your car. I was quoted for $1500 at a body shop that have done this job before. As for me, I did it myself with a welding machine and the parts that only cost me $300 altogether.
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Old 02-09-2015, 07:33 PM   #3
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Quote:
Originally Posted by undecidead View Post
Hey guys, I recently discovered that there are common subframe issues in the E46.

I have a 323i produced in January 2000 and I am now planning on getting a reinforcement kit welded in as a preventative measure.

There are a couple of things, can you install a reinforcement kit on an un-cracked subframe and what is the average cost for installing this kit.

Thankyou to anyone with help.

If you really have NO current damage, search "Bolt Though" subframe design. This is a much cheaper & easier way to go.



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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
I Know How To Fix The Rear "Bouncing" Problem On Your Cheap Coilovers Like: Jom RL FK SE & RK.
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Old 02-10-2015, 12:28 AM   #4
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I just had this done with the TMS kit and mine was around 1,200, the shop had done it before in the past and did a pretty good job. I found a few small cracks that had started so I got to mine just in time since I just lowered the car with new shocks, struts and springs. also don't forget to check all your bushings while you are in there, I had all mine replaced along with the welding job.
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Old 02-10-2015, 01:14 AM   #5
glwillia
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I'm actually planning on having my entire rear suspension gone over this summer--I get the "clunk" when shifting sometimes, car is a 2002 330Ci manual, 75k miles, completely stock. I'd have diff mounts, rear subframe mounts, RTABs, etc all replaced. Is it worthwhile to have the TMS kit installed as a preventative measure? I know the problem largely manifests itself on the 1999-2000 cars, but I do plan on doing some BMW CCA HPDEs and I'd like to have the peace of mind.

Last edited by glwillia; 02-10-2015 at 03:03 AM.
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Old 02-10-2015, 04:35 AM   #6
Alex323Ci
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wow you have a 323i in England and it's still going without subframe damage? that's pretty good. are you the original owner? because i recall overseas having the issue fixed by BMW before we had ours done from a voluntary inspection. meaning your car might already have had it replaced once.

yes you can have it done on good metal. but as Rob said the bolt through method might be the insurance you're looking for.

as for costs, not sure in the UK. one shop there is on YouTube called Redish Automotive , check them out.
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Old 02-10-2015, 05:41 AM   #7
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If you really have NO current damage, search "Bolt Though" subframe design. This is a much cheaper & easier way to go.



Rob43

Very interested! Can someone provide me with a thread/link going into detail with this bolt through method???
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Old 02-10-2015, 02:12 PM   #8
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Quote:
Originally Posted by glwillia View Post
I'm actually planning on having my entire rear suspension gone over this summer--I get the "clunk" when shifting sometimes, car is a 2002 330Ci manual, 75k miles, completely stock. I'd have diff mounts, rear subframe mounts, RTABs, etc all replaced. Is it worthwhile to have the TMS kit installed as a preventative measure? I know the problem largely manifests itself on the 1999-2000 cars, but I do plan on doing some BMW CCA HPDEs and I'd like to have the peace of mind.
differential mount would certainly fix your clunking when shifting into gear.
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Old 02-10-2015, 03:34 PM   #9
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Quote:
Originally Posted by undecidead View Post
Very interested! Can someone provide me with a thread/link going into detail with this bolt through method???
This should get you started:

http://forum.e46fanatics.com/showthread.php?t=1047178

http://forum.e46fanatics.com/showthr...5077&highlight


There are many many more threads on this subject, both of these should give you a good idea though.



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Rob #43 ITS/ITR/STU, BMW 325I, STU LAP RECORD
SUMMIT POINT WV 1:24:229 SCCA
(DynoDynamics https:vimeo.com/8486878 Dyno Video)
"Chance Favors The Prepared Mind"

I BUILD SUSPENSIONS (Consult) FROM MILD TO WILD FOR RWD & Xi E46's
Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
I Know How To Fix The Rear "Bouncing" Problem On Your Cheap Coilovers Like: Jom RL FK SE & RK.
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