Rear Shock Trouble - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 04-27-2006, 05:03 PM
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Rear Shock Trouble

I am trying to troubleshoot an awful thumping sound coming from the rear right of my 325i. It happens when I hit bumps in the road, so I assume the problem is the shock. If it is, can anyone tell me if I need to replace the whole shock assembly or if I can get away with just replacing smaller (cheaper) parts? If it isn't, any ideas?

RFT
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#2 (permalink) Old 04-27-2006, 05:23 PM
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Ok, I just took a drive and watched the action. The sound is definitely the shock. It hits metal-on-metal when returning after hitting a bump (or rattles rapidly on uneven pavement). The piece of rubber between the two pieces of metal is almost completely disintegrated. So, the question stands: do I need a new shock assembly or can I just order a few small parts? Also, does anyone have a photo of one in good condition?

RFT
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#3 (permalink) Old 04-27-2006, 05:38 PM
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Quote:
Originally Posted by rfthomas
Ok, I just took a drive and watched the action. The sound is definitely the shock. It hits metal-on-metal when returning after hitting a bump (or rattles rapidly on uneven pavement). The piece of rubber between the two pieces of metal is almost completely disintegrated. So, the question stands: do I need a new shock assembly or can I just order a few small parts? Also, does anyone have a photo of one in good condition?

RFT

u need new Rear Shock Mounts, my recomendations would be either E46 M3 mounts or Ground Control.

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#4 (permalink) Old 04-27-2006, 05:39 PM
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Strut mounts... I had the problem along with many others on this site... wouldnt hurt to get some rear shocks either tho...

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#5 (permalink) Old 04-27-2006, 05:40 PM
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Are those compatible with the e36 without modification (straight swap)?
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#6 (permalink) Old 04-27-2006, 06:01 PM
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I used stronger, aftermarket mounts... i believe they are the same for E36 and E46, but Im not totally sure.

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#7 (permalink) Old 04-27-2006, 07:03 PM
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Quote:
Originally Posted by rfthomas
Are those compatible with the e36 without modification (straight swap)?
the e46 m3 ones? yes

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#8 (permalink) Old 04-27-2006, 07:12 PM
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E46 uses the same parts.. just newer and better materials...

I would look at www.rogueengineering.com they have a killer one... I use their product.

Les


1997 E36 M3 1990 E30 325i
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#9 (permalink) Old 04-27-2006, 09:05 PM
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how many miles do you have on the struts? if they are stock struts and have say... more then 50,000 miles on them they most likely need replacing anyways... your problem with the sound is your RSM (rear strut mounts) this is a common replacement in e36's so its no surprise... youve got a couple options... i sugest the e46 m3 vert RSM's because i hear that they are stronger then the regular m3 mounts and you can find these for around $12 each?? maybe pair? but ya those will need replacing after a little while too but they should last you for a decent amount of time... there are also aftermarket RSM's that cost close to $100 and have lifetime warrenties on them if you want to invest... i figure ill get other suspension mods over time and just replace the RSM's with them and id rather just spend $12 a couple times then pay 100 once...

good luck

nick
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#10 (permalink) Old 04-28-2006, 08:14 AM
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judging by the pictures and your description you do need new rsm's, you can get oem ones from bavauto for like 20 bucks or less or you can go to your local dealership and pick up a pair for cheap if you don't want to spend $100 on aftermarket ones, i've had the same problem for quite a while, but have yet to figure out the culprit, i was about to warn you that rsm's might not be the answer but as i stated before juding by the pictures and your description that is most likely what you need to buy, very simple install so you shouldn't have any problem

good luck and hope you get everything worked out

-Shahab

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#11 (permalink) Old 04-28-2006, 08:29 AM
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I just ordered the shock mounts from Rogue Engineering. I have a fairly bumpy commute and don't need to be replacing OEM ones every few months. Now I'm trying to decide if I want to order new shocks too, or just chance it with the ones I've already got.

RFT
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#12 (permalink) Old 04-28-2006, 11:22 AM
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Quote:
Originally Posted by rfthomas
I just ordered the shock mounts from Rogue Engineering. I have a fairly bumpy commute and don't need to be replacing OEM ones every few months. Now I'm trying to decide if I want to order new shocks too, or just chance it with the ones I've already got.

RFT
replace the shocks at the same time... even if you just go to Auto Zone and get AC Delco or w/e they sell. Yours look beat, and it wouldnt be much harder to do it right. Plus rear shocks are cheap.

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#13 (permalink) Old 05-09-2006, 05:03 PM
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I just installed the Rogue Engineering shock mounts and a new pair of Bilstein shocks. Oh man, what a difference! Thanks for the advice, all.

RFT
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#14 (permalink) Old 05-09-2006, 06:36 PM
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Quote:
Originally Posted by rfthomas
I just installed the Rogue Engineering shock mounts and a new pair of Bilstein shocks. Oh man, what a difference! Thanks for the advice, all.

RFT
And now you need to save up and replace the front ones. If the back ones were bad, so are the fronts.

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#15 (permalink) Old 05-10-2006, 12:40 AM
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to replace the rms, what needs to be removed first, everything?

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