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-   -   Water leaking up through rear shock mount into trunk. Anyone else seen this? (http://forum.e46fanatics.com/showthread.php?t=841353)

SharkmanBMW 05-03-2011 03:21 PM

Water leaking up through rear shock mount into trunk. Anyone else seen this?
 
When driving in rain, i have water around the RSMs that runs down to tge plastic trays.
I have Rogue Engineering rear shock mounts, they told me they have never seen that before.
I had similar leakage from the OEM mounts but figured the new Rogue ones would solve the problem.
As far as I know they are properly installed & paper gasket is there.

Any ideas?

wdeerfield 05-03-2011 03:26 PM

did you reuse the gasket or get a new one? i would just replace with a new one since its a quick 20minute change for the rear shocks.

SharkmanBMW 05-03-2011 03:59 PM

Maybe I should put a few paper gaskets, any harm in 3 per side?
The paper gasket was reused but was only on the car for 3 weeks.

vazquezjavi 05-03-2011 04:48 PM

One gasket should be more than enough.

SharkmanBMW 05-03-2011 06:03 PM

I will buy a few extra gaskets in case.
I think if I shine a light from underneath it may help expose the exact spot, but either way, I will remove the shocks, make sure the underside of the shock tower is clean, replace paper gaskets and cross my fingers!

Kubica 05-03-2011 08:35 PM

I would have a good look for any bends in the sheet metal. Replace gaskets and torque to spec with the car on the ground.

SharkmanBMW 05-03-2011 09:43 PM

Thanks for the input everyone.
Kubica, when you say torque on the ground, my Rogue RSMs bolt from below, can't do it with wheel on. I will try to find a way to be sure the mounts are seated well...

I will also definitely check well for bent metal.
Any chance someone has pics of the rear shock mount area without shock? Just so I can compare to mine.
I have a few pics of my mounts wet, I will upload them when I get home in case someone can see an obvious mistake I missed ;)

xi_ter 05-04-2011 09:55 AM

You can put some Form-a-Gasket on both sides of the paper gasket.
http://ecx.images-amazon.com/images/...500_AA300_.jpg

There is a lot of splashing in the rear tower.

SharkmanBMW 05-04-2011 08:11 PM

Quote:

Originally Posted by xi_ter (Post 13123186)
You can put some Form-a-Gasket on both sides of the paper gasket.
http://ecx.images-amazon.com/images/...500_AA300_.jpg

There is a lot of splashing in the rear tower.

I considered that but was worried I would have a hard time removing the paper next time I take it all apart. (It could be stuck in the underside of the shock tower?)
It would probably do the trick though.
Has anyone tried it?

Small update:
I drove 30 mins. in rain yesterday morning, water was all over the mounts after.
I drove 30 minutes in rain 5 hours later, there was NO leak!
The only difference between the two drives was the morning ride had 8 or so really fast left/right sweeping turns & offramps. Rain was about the same - heavy.
Today, 15 minute drive in light rain, only driver side wet a bit. I would love to watch the mounts work from the trunk while driving.
Anyone see something obvious in the pics?






wdeerfield 05-05-2011 07:51 AM

Because they mount from the top, what do you have on the underside? just the two nuts to hold it to the tower? seems like the tower may be not flat and the RSM is not sitting flush. Mine mount from below so i have the paper gasket on the underside. Im assuming your gasket is on the top now?

SharkmanBMW 05-05-2011 11:28 AM

No, gasket under, same as yours.
http://www.rogueengineering.com/rogue/S_BUSH/RSM.html
http://www.rogueengineering.com/mm5/...rsm/shock2.gif

wdeerfield 05-05-2011 12:25 PM

ah gotcha. unfortunately ive got nothing then. maybe go with a new gasket and clean the surfaces really well before installing.

Kubica 05-05-2011 01:11 PM

The more I think about this the more I think the RSMs need to be replaced.

I'd stick with OEM or meyle next time. The reinforcement plate looks like it could be used again if you can take out the bolts (or the bolts on the oem RSM).

SharkmanBMW 05-05-2011 03:22 PM

I had leakage with the OEM mounts as well, before the Rogues RSMs :hmm:
Only have about 1500 miles max and Rogues tells me they have never seen this before.
Quality of the parts is amazing, rebuildable with new bushings...
The reinforcement plate has the 2 bolts welded on so that is the only way it goes.
I have to have a good look up into the underside of the shock tower, probably has crap / rust stopping the RSM from seating flush.
Kind of scared what I might find (rust).

stockgp 02-16-2012 10:22 PM

didyou ever get this worked out? my driver's side is doing the same thing

SharkmanBMW 02-17-2012 01:24 AM

Quote:

Originally Posted by stockgp (Post 14091737)
didyou ever get this worked out? my driver's side is doing the same thing

I thought it was fixed :(
Questions:
What kind of shocks and rear shock mounts do you have, and how old are they?
How much leaking do you get?
Are you sure it's the mount & not the trunk seal? (the dealer insisted that was the cause lol)

I had everything removed, cleaned & sanded from the underside to be sure it was smooth, there was a tiny bit of surface corrosion, nothing that would interfere. Then sprayed some primer & put some black gummy stuff as an added sealant along with the new paper gaskets.
It was good for awhile but the passenger side is leaking again.
At this point, I just sprayed some Anti-Rust stuff on it and give it a wipe & spray it again when required.

Next time I remove any of those parts I will put a new OEM mount, but at this point as long as my battery stays clean & dry it will have to do.
With the luck I have had my new rear M3 Bilsteins are probably leaking too !
The rear suspension issues NEVER end.

SamDoe1 02-17-2012 08:55 AM

Quote:

Originally Posted by SharkmanBMW (Post 14092084)
I thought it was fixed :(
Questions:
What kind of shocks and rear shock mounts do you have, and how old are they?
How much leaking do you get?
Are you sure it's the mount & not the trunk seal? (the dealer insisted that was the cause lol)

I have Konis, OE shock mounts, OE gaskets, and no leaking whatsoever. Doubt it's the trunk seal, otherwise you'd see it on the floor instead of by the shock mounts.

stockgp 02-17-2012 09:05 AM

I.have konis and just installed meyle hd mounts. I have no idea what kind of mounts came out. There are no identifying marks on thm.

The leaking isn't horrible, but its bad enough that you can see a trail of **** that.has run down the shock tower. Also, on occasion I will find water on the trunk carpet.

stockgp 03-10-2012 08:56 PM

Well since there isn't much input on this subject on this forum, I found a fix myself.

Bought a sheet of 1/16" solid silicone and went to town.

Cut a gasket that fit the ram bolts, but was a bit smaller than the rubber bushing diameter so it would stretch, then I stalled as normal. I ran a test spray on the side that was leaki g, and enough of the silicone sanwiched between the bushing and the bushing hole that it sealed the.leak. a

As long as it stays that way, im a happy sob.

stockgp 03-11-2012 12:33 PM

and just to give you an idea of what i mean:

http://img.photobucket.com/albums/v2...-06-33_555.jpg


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