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I'm on my second 147 GTA now :) and getting rather frustrated. :mad:

The first one (04 plate) developed a horrible "boinging" noise from the front suspension which could be felt up through the pedals. It got so bad it had be whipped into Guest Alfa. They couldn't find the problem so just changed the front struts and springs under warranty. It started doing it again....but then it was stolen so no longer my problem!

The second and current one (54 plate) has just had coil over suspension fitted. Guess what? the same horrible noise is occuring irregularly- on a DIFFERENT car with NEW suspension.

It sounds like the road spring is becoming either unseated or is catching on a wishbone,....or.....maybe the anti roll bar catching or "returning" to its position.

The noise is so disconcerting and "dangerous" it makes me want to get out of the car and leave it on the roadside, then call the wrecker truck to tow it away.

This noise is not suspension bushes - because they have all been replaced under warranty.

I'm thinking this is a design / development problem otherwise why would it occur on two different cars one with standard suspension and the other with coil overs????

Anyone had the same problems as me???

If Guest Alfa can't identify it what hope have I got!!!!

A big help please - I can't face more Alfa suspension problems!!!!!!!
 

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I know that the ARB and associated bushes are a definite known weak point on the GTAs. Did you have the ARB replaced on either car?
 

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I'd also say the same - sounds similar to what I had on mine - how does the car handle? - as mine was a bit like a boat when it was replaced along with the drop links.
 

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Have something similar to what you're describing, feels as if something is getting caught, releasing and flicking causing a knock, like a spring would.

Have the drop links been changed at any point?

That's what has been suggested to me, not that expensive and easiest out of the suspension components to replace. £24 each from a dealer, ebspares and alternativeautos do them for less, don't know how or if they differ though.
 

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With the ARB, I've always been told it's the bushes on the ARB, not the bar itself, but that they can't be replaced separately.

Is there any mileage is powerflex types? Can these be bought and fitted instead?
 

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Is there any mileage is powerflex types? Can these be bought and fitted instead?
Powerflex only do the normal ARB (22mm)

Superflex has them (23mm) + instructions on how to undo the riveted brackets, still a job and a half getting it out though.


But I could try the drop links though :)
I see a glimmer of light!
 

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Are you sure the ARB bushes have been done? As stated above, the perceived wisdom is that they are impossible to replace - the whole ARB has to be replaced.
 

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(for me) Not really getting knocks over any sort of bumps or road surfaces, only during or after turning maneuvers, then yes a bump can set it off. Can sort of recreate it by applying full lock while stationary then accelerating slightly, say sort of as it's random.


Diclaimer: Don't normally put undue strain on steering without rolling, strictly for the sake of pinning this one down... with not much success.
 

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Well guys I have exactly the same happening on my car, and it is getting worse. It is on one side and sounds like it is behind the passenger side footwell. It seems to emanate from possibly the lower wishbone mounting positions, but it is odd as it sounds like a spring being pushed / trapped then released, or a bearing 'slapping' from one side to another. If I slalom down the road at about 20 mph you can hear it clonking - and then is seems to suggest it is the driveshaft or CV joint. Its a 'boing' or 'clonk' type noise and often they come in pairs. It can happen when moving off, as if the suspension is being unloaded, less often when braking, but it also does a have a go on one particular long fast uphill bend on the daily commute. Occasionally you do get 3 or 4 boings as if it is ratcheting.

I did change in the last couple of weeks to coilovers and I have changed my front anti-roll bar, I have also driven around for half and hour with the anti roll bar / drop link disconnected on that side to try and eliminate the antiroll bar / drop link set-up from the equation.

I am going to jack it up soon as try and see if it could be the lower wishbone mounts, but I just know it is going to be difficult to simulate road conditions.

I started thinking of a list of what it could be:

Lower wishbone bushes
Spring binding somehow in shock
Top plate of shock binding
CV joint
Wheel bearing
Steering rack
Track rod end
Shock absorber
Upper or lower hub ball joint connection
Anti - roll bar - ( but me thinks this one is eliminated)
Upper wishbone bushes
Engine mount

I have listened and listened and listened but I just can't seem to identify where I think it is coming from. Also, it does seem to move about a bit occasionally. Mostly it seems to come from what I think is the lower wishbone area but then it sounds again and I then think it is something else.

I had my wife try and locate it from the passenger seat and she suggested that it was almost under where your feet would be below and forward of your toes. I did think it could be the lower engine mount because she described it as being rather central. I know where 2 of the engine mounts are (1 top and 1 bottom) but I am not sure where others may be. I did change the top one recently as the rubber bush at one end had split. It improved the gearchange but seems to have now intensified the boing! The sound doesn't seem to come from the steering - as any vigorous steering input when stationary does not make it happen - so not the rack in my mind. It also doesn't seem to be the suspension in an up and down motion as when going over one of those large humps in mini roundabouts that just pushes the suspension up and down on that one side doesn't make it happen. It is more when the suspension is asked to take a load front to back with a twisting action. If you can imagine a load holding the front wheel back and then an extension of the suspension - then it happens. A loud 'click - clack' or boyng -bong'. And occasionally 3 may be 4. I did think it may be the drive shaft being pulled out and then back in - but maybe not, or one or both of the bottom whichbone bearing having ovalised, but it does seem to be difficult to isolate.

I am going to focus on those bottom wishbone bearing this weekend, but it is so difficult to manipulate the suspension when the car is on the jack.

Any ideas anyone?
 

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You can get a very loud ratcheting sound from cv joints under load when they are on the way out, but its quite a fast noise in time wih the wheels rotation and would occur for more than 3 or 4 clacks.

BTW check that your plastic wheel insert isn't loose, a screw holding it in can come lose and then catch the wheel when locked is applied and the wheel is loaded.
Happened to me - sounds dramatic, but trivial to fix obviously.
 

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TB,

Interesting.....I am certainly going to have a look at the liner, it could be that although it didn't show anything obvious when I had my head poked around in there for a whole day recently changing the shocks.

From your description it doesn't quite sound like the CV joints as I think as you describe isn't it more of a fast clicking that picks up and drops with wheels speed. This seems to be more to do with the weight of the car shifting with inertia. It could be CV but if it was it would I think have to do almost more with end float than the bearing breaking down as it is more apparent when the wheel is being axially loaded with forward momentum.

What I am wondering is whether I take it to a garage are they going to be able to pinpoint it - or I am going to be chasing for ages......?
 

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Are you sure the ARB bushes have been done? As stated above, the perceived wisdom is that they are impossible to replace - the whole ARB has to be replaced.
They aren't inpossible you just need to crack open the bits that hold the bushes in place then bolt them back together with new bushes.

This was the option my specialist gave me when I went for the GTA ARB's front and back on my car a few months ago.

That Alfa Parts place that everybody links to (and I can't remember) sells the bushes as a sole item.
 

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I did change in the last couple of weeks to coilovers and I have changed my front anti-roll bar, I have also driven around for half and hour with the anti roll bar / drop link disconnected on that side to try and eliminate the antiroll bar / drop link set-up from the equation.
That's an idea, I'll remove one of the links first and foremost :thumbs:
 

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If you were really keen you would remove both and tie the bar up, that way the you would totally eliminate the ARB bushes from the problem. With only doing it on one side I guess there is a small chance that there could be enough movement / leverage from a drop link on the remaining connection to still sound out the problem.

If you know what I mean.

Also, as Ghostlydog suggest you can just do the bushes. I put Superflex in mine. A bit of a job but then would I rather pay someone else to do it............er no!
 

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