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leaking control arm
07-29-2011, 01:12 PM
Post: #1
leaking control arm
Hello,

There is a black fluid leaking from the driver side control arm. The year and model is, a 2005 C240. Has anyone seen this problem?
Any advise on the replacement procedure for this control arm?
Any help would be greatly appreciated.

Thanks in advance,

Paul
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07-29-2011, 01:19 PM (This post was last modified: 10-03-2011 07:48 PM by Rupe.)
Post: #2
RE: leaking control arm
It's probably not the control arm that is leaking. More likely it's fluid from the shock / strut assembly running down from above. (look around the spring area)

First I would double ckeck all of the other fluids to be sure it's not an oil leak, trany leak, or PS leak. (stuff can blow around at highway speeds) If you find all is ok other wise I would look into replacing both struts (shocks) on that end of the car.

Before jumping onto the job it may be worth a phone call to the dealer to see if there's any extended warranty. Some high end cars go as far as 6 - 10 years on certain parts now.

Let us know if that helps.
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07-29-2011, 02:31 PM (This post was last modified: 10-03-2011 07:49 PM by Rupe.)
Post: #3
RE: leaking control arm
(07-29-2011 01:19 PM)Rupe Wrote:  It's probably not the control arm that is leaking. More likely it's fluid from the shock / strut assembly running down from above. (look around the spring area)

First I would double ckeck all of the other fluids to be sure it's not an oil leak, trany leak, or PS leak. (stuff can blow around at highway speeds) If you find all is ok other wise I would look into replacing both struts (shocks) on that end of the car.

Before jumping onto the job it may be worth a phone call to the dealer to see if there's any extended warranty. Some high end cars go as far as 6 - 10 years on certain parts now.

Let us know if that helps.

Thank you for your advise. This stuff is only on the control arm, very corrosive, because it's penetrating the sealer on the epoxyied garage floor, I'm sure its not motor oil, transmission fluid or power steering fluid. I will take a closer look at the shock / strut.
Thank you.
(07-29-2011 02:31 PM)lakonia14 Wrote:  
(07-29-2011 01:19 PM)Rupe Wrote:  It's probably not the control arm that is leaking. More likely it's fluid from the shock / strut assembly running down from above. (look around the spring area)

First I would double ckeck all of the other fluids to be sure it's not an oil leak, trany leak, or PS leak. (stuff can blow around at highway speeds) If you find all is ok other wise I would look into replacing both struts (shocks) on that end of the car.

Before jumping onto the job it may be worth a phone call to the dealer to see if there's any extended warranty. Some high end cars go as far as 6 - 10 years on certain parts now.

Let us know if that helps.

Thank you for your advise. This stuff is only on the control arm, very corrosive, because it's penetrating the sealer on the epoxyied garage floor, I'm sure its not motor oil, transmission fluid or power steering fluid. I will take a closer look at the shock / strut.
Thank you.
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07-29-2011, 04:02 PM
Post: #4
RE: leaking control arm
Some shock fluid can be pretty nasty but you might also want to check the brake fluid (will remove paint) and the battery, which is filled with acid.

The fact that it looks black may not be the fluid itself, but either paint or under coating from the suspension parts.
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