Knocking Noise (New Sound Clip!!)

[Polo 2011 Moda]

Hi all

Got my car back in April...
Started hearing a knocking noise (comes & goes) when going over speed bumps and pot holes, coming from underneath about a month after, had it booked it with VW, they couldn't find anything wrong with it & said its safe to drive.

Still happening now!! Past couple of months I've noticed that when its been wet outside (rain etc) it always does it.
The noise is quite loud, like a big rattle coming from somewhere near the front I think! I tried recording the noise but couldn't get it
My mate has had it on a ramp and looked at everything but he cant find anything.

I'm just fed up with it now after so many months...
Hoping someone else has had this problem & can tell me what it is!

------------------------------------------------------------------------------------
EDIT!!!

Recorded more last night, put it altogether for VW

1.39mins of noise...
https://www.youtube*.com/watch?v=9-mlMJZRSd4

Might have to copy & paste the link into your browser...

[CANDYMAN]

When it is doing it doe's it go when you press the brakes?

[Polo 2011 Moda]

When it is doing it doe's it go when you press the brakes?

I don't think it does, normally braking when going near a speed bump but not sure if I carry on braking when going over it
What you thinking?

[NeilMcConville]

I think i've heard this noise myself. For me it sounds as if there is something trailing along underneath the front left of the car :/ It does come and go, hasnt happened for quite some time now, fingers crossed

[Polo 2011 Moda]

I think i've heard this noise myself. For me it sounds as if there is something trailing along underneath the front left of the car :/ It does come and go, hasnt happened for quite some time now, fingers crossed

Yep, under the passenger floor!!
I have a sound clip & you can hear the noise, will upload in a sec...

"SAMBA VAN MAN" I just went out & tried, I'm not braking when its happening...

[CANDYMAN]

[/quote]

"SAMBA VAN MAN" I just went out & tried, I'm not braking when its happening...[/quote]

What i mean is if it is noisey when driving and you press the pedal doe's it go? Is it a knock noise or a scraping noise? in a straight line or when cornering?

[Polo 2011 Moda]

File download
http://www.mediafire.com/?k4uoq6yx14q2nds

Clip lasts for 2.06

Noise Timeline
0.26
0.34
0.42
0.51
1.09
1.24
1.41
1.50
2.01

This is going on a straight road with 9 speed bumps in wet weather again
Even if I turn into a speed bump, it still does it.
The noise is much louder that the sound clip!! So I think you now know why I'm annoyed!

[CANDYMAN]

With the car stationary if you rock the car can you hear it? sounds like it maybe suspension related maybe a shocker top bush? can you not take this sound file to VW and let them hear it? Know it sounds daft but the exhaust isnt catching the noise shield when your going over bumps and the system shakes? Or nothing in the glove box rattling around?

[Polo 2011 Moda]

With the car stationary if you rock the car can you hear it? sounds like it maybe suspension related maybe a shocker top bush? can you not take this sound file to VW and let them hear it? Know it sounds daft but the exhaust isnt catching the noise shield when your going over bumps and the system shakes? Or nothing in the glove box rattling around?

Not tried rocking the car, good idea.
My mate said about the suspension, something about it not being greased up enough and when it gets wet the noise happens... Or something like that!
If it was the exhaust, it'd be happening all the time?
Nothing in the glovebox.

[Polo 2011 Moda]

Bump!

While the noise was there today, I got out & rocked the car but no noise...

[CANDYMAN]

I think it is time for you to take it back to VW and get them to sort it out you shouldn't be expected to diagnose a fault on a new car. Ask can they provide you with a courtesy car while they take there time to find the noise maybe ask can they put their master technician on the job. Is the car under finance if so and vw won't sort the fault inform your finance company and let them know that vw are dragging their heels on sorting it, Finance companies have a bit of weight as they own the car until you make your last payment.

[CANDYMAN]

Just spotted this and thought of you http://uk-polos.net/viewtopi ... 56&t=52846

[Polo 2011 Moda]

Just think mines different because it only happens in wet weather...
Been listening to noises on Youtube & it probably is something to do with the suspension & maybe a CV joint! Sounded similar.

Gonna do more recordings, make a video with the sound altogether & goto VW...

[gavs]

Is your car a DSG or Manual? The mechatronics unit when playing around can rattle and clunck and while this might sound odd, sound carries better in damp air due to the moisture content and it can make the sound seem louder, hence why it sounds more prevalent in the wet.

If you have a manual, then it could very well be another prevalent scenario with these cars in that the front spindle housing which carries the strut, ball joint, wheel bearing etc has been incorrectly machines and your front, passenger side wheel bearing is on it's way out or has potentially already died. Always the same side, the front left. Always on models with cast-in caliper carriers.

[Polo 2011 Moda]

@GAVS - Its a Manual, thanks for the info!!

----------------------

Recorded more last night, put it altogether for VW

1.39mins of noise...
https://www.youtube*.com/watch?v=9-mlMJZRSd4

Might have to copy & paste the link into your browser...

For anyone who wants to guess what it might be before VW tell me