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Knock in front drivers suspension

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Old 11-26-2013, 02:43 PM
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2005 E55
Knock in front drivers suspension

I bought my car with 100K miles and one of the first things I did was replace the very noisy/worn front suspension bushings. I did upper control arms, both thrust arms, inner and outer tie rods, sway bar end links, all ball joints...its all new OEM stuff.

The car used to make a lot of knocking and clicking noises, so its hard to tell if this knock I'm hearing now was present before the refresh, all of the noises went away except this one.

But my question is, does anyone have any idea what this could be: When my car changes pitch positively or negatively, goes over small bumps, large humps, up and down ramps into parking lots, there is a knock only on the drivers side. I've gotten my head into the wheel well, and the fasteners keeping my new suspension in are all tight so thats not it.

Any help on this is much appreciated. Thanks!
Old 11-26-2013, 03:26 PM
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2003 W211 E55, 2003 W220 S600
rack and pinion inner tie rods.
Old 11-26-2013, 04:54 PM
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CLS55
Originally Posted by shardul
rack and pinion inner tie rods.
Shardul,
How can you check if its the inner tie rods? Expensive repair? The parts seem inexpensive.
Old 11-26-2013, 05:18 PM
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if the car is lowered the wear on the inner tie rods on the rack and pinion is accelerated. you will hear a popping sound when you turn the steering when and when you go over bumps. the CV boots will also be filled with oil and will start showing signs of leak.
Old 11-26-2013, 07:34 PM
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^ I'm dealing with this now and I only drive mine lowered about 50% of the time (daily driver).

Last edited by Quicksilv3r; 11-26-2013 at 07:36 PM.
Old 11-26-2013, 07:40 PM
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CLS55
What is the fix for this? Is it just inner tie rods? I have replaced just about everything else but I still hear a pop when my shocks decompress. It almost sounds like the shock is loose, but it isn't
Old 11-26-2013, 09:23 PM
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2004 E55, 2003 IS300
Away bar itself. Very notorious for casing this kind of noise. The bushings are volcanized to the sway bar. A new sway bare isn't extremely expensive but replacing it is a whole other story. It's routed over top of the subframe and it must be lowered. Having it done at a shop will be pricey and doing it yourself will be a bit of a project. Doable? Yes... But a pain in the a##!!
Old 11-26-2013, 11:19 PM
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'06 E55 AMG
Originally Posted by AMG55TECH
Away bar itself. Very notorious for casing this kind of noise. The bushings are volcanized to the sway bar. A new sway bare isn't extremely expensive but replacing it is a whole other story. It's routed over top of the subframe and it must be lowered. Having it done at a shop will be pricey and doing it yourself will be a bit of a project. Doable? Yes... But a pain in the a##!!
Exactly.

Wurth HHS-K works brilliantly and will penetrate the bushings.
Old 11-27-2013, 12:45 PM
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06' E55, 10' Harley Davidson F-250 6.4L TT
Originally Posted by DVC
Exactly.

Wurth HHS-K works brilliantly and will penetrate the bushings.

Please elaborate.. Is that a grease!?
Old 11-27-2013, 01:24 PM
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2004 E55, 2003 IS300
Originally Posted by W219CLS55
Please elaborate.. Is that a grease!?
Its not necessaraly a grease, but more of a penetrating oil that will lubricate the bushings. A "grease" will be too thick and will not enter the inside cavity where the bushing sits, it will just stay where it is sprayed/ applied. But if a penetrating grease/ oil is used, it will work itself into the cavity. This will should help remedy some of the knocking noise, but the bushings will still be worn. This would be a band-aid fix and may have to be re-applied later on. Im going to try to do this on mine to ease some of the annoying knock noise until im able to do a full suspension freshen up (bushings, ball joints, sway bar).
Old 11-27-2013, 02:35 PM
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06' E55, 10' Harley Davidson F-250 6.4L TT
Originally Posted by AMG55TECH
Its not necessaraly a grease, but more of a penetrating oil that will lubricate the bushings. A "grease" will be too thick and will not enter the inside cavity where the bushing sits, it will just stay where it is sprayed/ applied. But if a penetrating grease/ oil is used, it will work itself into the cavity. This will should help remedy some of the knocking noise, but the bushings will still be worn. This would be a band-aid fix and may have to be re-applied later on. Im going to try to do this on mine to ease some of the annoying knock noise until im able to do a full suspension freshen up (bushings, ball joints, sway bar).
THANK YOU!!
Old 11-27-2013, 03:05 PM
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He summed it up perfectly. I think I used it a good 6 months ago and have not had to reapply it yet.
Old 11-30-2013, 01:20 AM
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w205 C63s, w212 E63,w219CLS500-SOLD! w211 E63, 2006 E60 M5 (KABOOM!)
I had a left side clunk on my car. I heard it every morning heading to work. Mine turned out to be a broken motor mount. Mounts were replaced, no more clunk. Just something to check while your at it.
Old 11-30-2013, 08:27 AM
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I'm doing a whole suspension job myself minus the sway bar bushings area, but my bushings are done with and my steering wheel shakes at 55 mph
Old 11-30-2013, 01:08 PM
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06 E55 AMG
Of topic newbie here, what kind of wheels w219cls55 they look sick.
Old 12-01-2013, 08:59 PM
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2005 E55
Originally Posted by shardul
rack and pinion inner tie rods.
inner and outer tie rods are new.
Old 12-01-2013, 09:00 PM
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2005 E55
Originally Posted by jaedee
I had a left side clunk on my car. I heard it every morning heading to work. Mine turned out to be a broken motor mount. Mounts were replaced, no more clunk. Just something to check while your at it.
motor mounts have less than a 1k miles, thanks though
Old 12-01-2013, 09:23 PM
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Could be the shock itself. These do have some issues with internal noise

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