rear sub-frame failure help

Autotechnica · 05-09-2002, 07:53 PM

I have the rear sub-frame failure on my '92 318. All '95 and later E36 models have the proper reinforcement and all the E36's before that have a design flaw. I'm briging my car to Charlie (bimmersport) to get the sub-frame repaired and reinforced and putting some new PU sub-frame mounts. Does anyone know what else I should put on reinforcement or parts as an extra percaution? I intend to do more autocrossing and hope that the rear sub-frame will be better than new since its the new reinforcement design. Also, if I heard a loud thud and lots of thumping noises comming from the rear while shifting that means its the sub-frame or the differential mounts? Thanks

Bryan

Autotechnica · 05-09-2002, 07:56 PM

here's a picture

KIRASIR · 05-09-2002, 08:56 PM

Check your guibo.

SL

Quote:

Originally posted by MTRD
Also, if I heard a loud thud and lots of thumping noises comming from the rear while shifting that means its the sub-frame or the differential mounts? Thanks

Bryan

Autotechnica · 05-09-2002, 09:46 PM

Quote:

Originally posted by KIRASIR
Check your guibo.

SL

Check my wha?

mogie · 05-09-2002, 10:35 PM

On your drive shaft you have a coupling that is made of rubber, check that for cracks too. If that is failed it is possible that excessive driveline vibration can cause other bodily stress.

KIRASIR · 05-09-2002, 10:39 PM

Sorry guibo is what mogie said: a rubber "disk" between the driveshaft and the tranny.

SL

Quote:

Originally posted by MTRD

Check my wha?

Autotechnica · 05-09-2002, 10:41 PM

Quote:

Originally posted by mogie
On your drive shaft you have a coupling that is made of rubber, check that for cracks too. If that is failed it is possible that excessive driveline vibration can cause other bodily stress.

Thanks Mogie.. is that what a "guibo" is?

Does the drive shaft how to come out when repairing the rear sub-frame, also how much does the rubber peice costs? Can it be replaced with stronger urethane? Thanks

Bryan

Autotechnica · 05-09-2002, 10:56 PM

Quote:

Originally posted by KIRASIR
Sorry guibo is what mogie said: a rubber "disk" between the driveshaft and the tranny.

SL

Thanks SL,

is this a common problem?

KIRASIR · 05-10-2002, 12:51 AM

As far as I know guibo is a "wear" item. Since your bimmer is a 92 I would not be surprised that your guibo is shot. I think it costs about 70US from bavarianautosports. It's not really a problem, they wear out with time just like any other bushings.

I don't think it is advisable to replace it with a urithane one since its primary function is vibration dumpening, and urithane pretty much sucks at it.

Sergei

Quote:

Originally posted by MTRD

Thanks SL,

is this a common problem?

djcontra · 05-10-2002, 06:54 AM

shit man
i hate hearing about this subframe failure stuff
how much does it cost to get the reinforcement plates installed?
if it's not too much, i'm probably better off safe than sorry

Autotechnica · 05-10-2002, 07:25 AM

Quote:

Originally posted by KIRASIR
As far as I know guibo is a "wear" item. Since your bimmer is a 92 I would not be surprised that your guibo is shot. I think it costs about 70US from bavarianautosports. It's not really a problem, they wear out with time just like any other bushings.

I don't think it is advisable to replace it with a urithane one since its primary function is vibration dumpening, and urithane pretty much sucks at it.

Sergei

Thanks, looks like this job is going to costs me close to $1000Cdn

Autotechnica · 05-10-2002, 07:26 AM

Quote:

Originally posted by djcontra
shit man
i hate hearing about this subframe failure stuff
how much does it cost to get the reinforcement plates installed?
if it's not too much, i'm probably better off safe than sorry

Approx. $600 + a few parts here and there. Possibly looking at $800-$1000Cdn.. ouch!

Bryan

djcontra · 05-10-2002, 08:06 AM

is that just for installation? or is that to fix your cracked subframe AND installation?

If that's what it costs to upgrade when i dont have the problem, i think ill just buy the parts and find somebody else to do it heh

Autotechnica · 05-10-2002, 04:56 PM

The whole point of installing the reinforcement is to fix the crack. Its labour and parts together. Parts is not expensive, the labour will kill you. You have to drop the whole differential, drive shaft, suspension, rear seats, possibly the gas tank, etc etc.

Don't bother to reinforce it yet if its not broken. We have a saying, "if its not broken, don't fix it". You will know when the rear sub-frame is starting to crack, you can hear and feel it. Who knows, if you don't drive the card hard or even track it once in a while you might not even run into that problem.

Bryan

bmwm5lover · 07-30-2003, 08:13 PM

do e30's have that problem too, or is it just for e36's?