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Rear suspension clunking - cannot solve! #4452509
07/07/17 04:53 PM
07/07/17 04:53 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
For about the last year or so, my Sedona has had a clunking in the rear suspension. It doesn't happen at higher speeds or on bigger bumps, but at lower speeds and on smaller bumps. Basically, I go over a bump, and there is almost a resonant 'rattle' for a second or two. Logically I would think sway bar end links, but I completely disconnected the sway bar, and the noise was still there. Seeing that the van is getting older, has some miles on it, and carries a decent load every day, I've been freshening up some parts lately:

-The main rear control arms had cracks in the bushings (not too bad), so I decided to replace those since they're easy and pretty cheap.
-The rear shock absorbers looked fine, but are even cheaper and easier than the control arms, so I put on 2 new KYB Excel-G shocks.
-Sway bar links are even cheaper and easier yet, so I did those too.

Long story short, the noise is still there! Everything on the underside looks fine. The rear trailing arm bushings are good, no cracks. The toe links look fine, secondary control arms look fine, sway bar mounting bushings are fine. All heat shields are in place, exhaust hangers are intact, etc. Everything on the inside of the van is held down tight, rear seats are removed so those can't make noise. The rear hatch and latch assembly are tight, the rear condenser unit for the A/C is securely fastened, etc...

Whatever is making the noise sounds substantial, either in weight/size. Could one of the toe link arm ball joints be bad? The boots look fine, but maybe there is play within the joint that I cant see. Any ideas? Van rides great otherwise, and is nice and tight after the new parts I put on.


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452511
07/07/17 04:58 PM
07/07/17 04:58 PM
Joined: Oct 2014
Posts: 11,857
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,857
Idaho
It can be hard to to at times to find a clunk especially if it is a binding type of noise.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452515
07/07/17 05:03 PM
07/07/17 05:03 PM
Joined: Oct 2014
Posts: 11,857
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,857
Idaho
It can be hard to to at times to find a clunk especially if it is a binding type of noise.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452523
07/07/17 05:09 PM
07/07/17 05:09 PM
Joined: Jul 2012
Posts: 8
Eastern Canada
Taurus979 Offline
Taurus979  Offline
Joined: Jul 2012
Posts: 8
Eastern Canada
Have you had exhaust work done? The shop hung my muffler too low and it bangs over low bumps on the rear axle. Drives me crazy.

Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452537
07/07/17 05:23 PM
07/07/17 05:23 PM
Joined: Sep 2014
Posts: 1,424
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,424
Seattle-ish, WA
Did you change the rear upper mounts along with the shocks?

Also, It can be a little tricky to correctly torque the rear shock upper nuts. That will create a nice clunk if not fully torqued down.

Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452538
07/07/17 05:23 PM
07/07/17 05:23 PM
Joined: Feb 2003
Posts: 7,438
Jupiter, Florida
Cujet Offline
Cujet  Offline
Joined: Feb 2003
Posts: 7,438
Jupiter, Florida
My money is on any component that has a ball joint. They are mechanical in nature, not rubber. So if they wear, they can cause a suspension travel related clunk.

One thing you can try, is to very lightly activate the emergency brake and see if it goes away. That could indicate a clunking caliper or rattling pads (if your ebrake is part of the caliper)

A harder application of the E brake might preload the suspension and may help indicate if your ball joint is bad.


People who count on their fingers should maintain a discreet silence.
Re: Rear suspension clunking - cannot solve! [Re: Cujet] #4452549
07/07/17 05:33 PM
07/07/17 05:33 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Cujet, thank you for bringing up the caliper issue. I forgot to mention it. All brake parts are tight. I've tried applying the brakes over bumps, and the noise is still present. The e-brake is actually a drum-style setup within the hub section of the rotor, and is totally independent of the main brake system. I will try using the e-brake and see if the noise goes away. I know they aren't adjusted properly, since the pressure they apply isn't as much as it used to be. But it's been that way for awhile, longer than the clunking has existed.


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452554
07/07/17 05:50 PM
07/07/17 05:50 PM
Joined: Feb 2012
Posts: 39
Iowa
cappilot Offline
cappilot  Offline
Joined: Feb 2012
Posts: 39
Iowa
I recently had a local shop look at a friend's 2006 Sedona in an attempt to run down suspension rattles both front and rear. The front was easy: last winter the Kia dealer replaced the control arms under a recall and neglected to tighten the !*^&6 bolts. Idiots. The rear was diagnosed as probably being the upper shock mounts. I've not checked the manual, but apparently the upper mount is not simply a welded-in-place bracket for the upper end of the shock. The diagnosis was 'probably' because (I'm told) without taking things apart it is not possible to actually see the mount. Also, the estimated price for a repair broke out the upper mounts from the shocks. At 222,000 miles new shocks are in order anyway, so one of these days we'll have both the mounts and shocks replaced.

As a side note, the Kia dealer that screwed up the control arm replacement is the same place that neglected to change the oil filter for the first several oil changes, even though they charged for the filter (of course). When I took over the minor servicing somewhere around 50-75,000 miles, the first filter change revealed a black and crusty item that I THINK was a filter. It's difficult to understand how an operation like that can stay in business.

Re: Rear suspension clunking - cannot solve! [Re: cappilot] #4452574
07/07/17 06:09 PM
07/07/17 06:09 PM
Joined: Dec 2016
Posts: 6,262
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,262
Waco, TX
Originally Posted By: cappilot
the Kia dealer.. is the same place that neglected to change the oil filter for the first several oil changes, even though they charged for the filter (of course). When I took over the minor servicing somewhere around 50-75,000 miles, the first filter change revealed a black and crusty item that I THINK was a filter.


I wish you would have cut that one open!!


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452593
07/07/17 06:43 PM
07/07/17 06:43 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
UPDATE: I just took the van for a drive, and applied the e-brake while going over some bumps. With the e-brake applied (which presumably loads the suspension) the rattling/clunking is almost constant now. Does this point to a bad ball joint?


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4452624
07/07/17 06:58 PM
07/07/17 06:58 PM
Joined: May 2014
Posts: 27
mi
rocky8314 Offline
rocky8314  Offline
Joined: May 2014
Posts: 27
mi
My moms sedona had the same problem, ended up being the rear passenger lateral arm. Was a PITA to change because alignment bolt was frozen in the bushing.


Re: Rear suspension clunking - cannot solve! [Re: Taurus979] #4452873
07/07/17 10:22 PM
07/07/17 10:22 PM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Originally Posted By: Taurus979
Have you had exhaust work done? The shop hung my muffler too low and it bangs over low bumps on the rear axle. Drives me crazy.


My first thought also...something in the exhaust.


Thick vs Thin test: 15k / 43k miles complete
Re: Rear suspension clunking - cannot solve! [Re: Linctex] #4453564
07/08/17 03:59 PM
07/08/17 03:59 PM
Joined: Feb 2012
Posts: 39
Iowa
cappilot Offline
cappilot  Offline
Joined: Feb 2012
Posts: 39
Iowa
Linctex:

No need to cut the filter open--it's an already wide-open cartridge.

Re: Rear suspension clunking - cannot solve! [Re: Klutch9] #4455389
07/10/17 03:16 PM
07/10/17 03:16 PM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Any update? Was it suspension or exhaust?


Thick vs Thin test: 15k / 43k miles complete
Re: Rear suspension clunking - cannot solve! [Re: Kuato] #4456366
07/11/17 02:34 PM
07/11/17 02:34 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Originally Posted By: Kuato
Any update? Was it suspension or exhaust?


Looks like it was the driver's side lateral link. It makes a creaking noise, and I feel a little slop when I pushed the van up and down. I'll be replacing within a few days. Hopefully that solves the issue.


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
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