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Kia ceed front anti roll bar Bushes

Tiny
MOSHEEN
  • MEMBER
  • 2008 KIA
  • 1.4L
  • MANUAL
  • 39,000 MILES
I am getting a knocking noise from the front driver side, this only occurs when I am driving on a uneven road surface, potholes, bumps. The drop links have been changed and all other aspects of the suspension have been checked by a mechanic and we still can find where the knocking noise is coming from, next step is to check all the front end bushes, please can some advise how to remove and inspect the front anti roll bar Bushes, I believe these are called D Bushes and the bushes on the front end wishbone

All help and how to guides will be greatly welcomed
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Monday, March 20th, 2017 AT 11:17 AM

5 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
The people at tire and alignment shops are experts at finding the causes of noises, pulling, off-center steering wheels, and bad tire wear. The place to start, if possible, is to have the vehicle inspected at one of those shops.

The easiest way to inspect anti-sway bar bushings is to place your finger on the bar, alongside the bushing, then bounce the vehicle up and down just a little. If you feel the bar moving up and down inside that bushing, it will make a dull thumping sound when you drive over small bumps in the road. The clue is the noise will usually stop while the steering wheel is turned slightly to one side. Turning puts a twisting force on that bar, and that puts pressure on it that momentarily stops the noise from occurring.

Control arm bushings are checked by prying on the arms while the vehicle is supported in such a way as to remove any load or stress on the bushings. For most cars that means raising it on a hoist and letting the suspension hang down freely.
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Monday, March 20th, 2017 AT 2:22 PM
Tiny
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Thanks for the info, I did take it to the specialist, but they said they can't find anything, and they will need to look and deeper which will be a chargeable service, so I want to know if there is anything that I can try.

I will try what you recommended, thanks
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Monday, March 20th, 2017 AT 2:29 PM
Tiny
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There is a tool you might be able to borrow or rent from an auto parts store that borrows them called the "Chassis Ear". It is a set of six microphones, a switch box, and headphones. You clip the microphones to suspect points, then drive around while listening with the headphones. You can move the microphones around to zero in on the source of the noise. Be aware that many mechanics have never seen or even heard of this tool. Suspension and alignment mechanics use it to find rattles, squeaks, and other noises.
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Monday, March 20th, 2017 AT 5:56 PM
Tiny
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Managed to get this sorted and fixed, just so shocked all the mechanics and garages I went to couldn't diagnose the issue, I jacked up the front end of the car checked all suspension components and which were fine, undone the bolts to d bushes cleaned and fitted them back (which only took 15mins per side) took car for a spin on a badly uneven rough road and the car drives superb, thanks for the replys

Will replace the D Bushes for new ones, above was just for process of elimination
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Thursday, April 13th, 2017 AT 3:59 AM
Tiny
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Dandy! The first time I ran into this, it took me a half day helping another mechanic who had been searching for a full day for the cause of the thumping noise. Since then we know what to look for and we've become experts. Now you have the same experience and you're also an expert.

The problem is the vehicle has to be sitting a certain way so there's no pressure on the bar, otherwise that pressure will make it impossible to see or feel the looseness. That usually means the car has to be on a drive-on hoist, not a hoist that lets the wheels hang down.

The good news is the mechanics who searched for this were honest and didn't try to sell you things they couldn't verify were needed.
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Thursday, April 13th, 2017 AT 6:56 PM

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