Rattle, Rattle, Rattle. Alcons?

GregorFuk · 05-03-2015, 01:37 PM

I'm loving my CSL but if I put the window down when running at low speed on a bumpy surface it sounds like a bag of spanners! Not Good.

However. I've noticed that just the lightest touch on the brake pedal will stop the rattling. This makes me think that the noise is coming for the Alcons I'm running on the front. Could it be the pads rattling in the calipers or the disks rattling on the bells? Or all of the above. Has anybody who's running Alcons suffered the same issue and resolved it? Or is it something I have to live with?

A quick peak through the front wheel tells me that I do have anti rattle springs fitted in the caliper. Well the offside one at least, I never checked the near side.

I notice from this month's EVO David Yu may be suffering from the same issue.

Any advice would be greatly appreciated.

Cheers

Gregor

trackm3 · 05-03-2015, 01:51 PM

Don't you just love floating disks !!!!

QUOTE=GregorFuk;179864]I'm loving my CSL but if I put the window down when running at low speed on a bumpy surface it sounds like a bag of spanners! Not Good.

However. I've noticed that just the lightest touch on the brake pedal will stop the rattling. This makes me think that the noise is coming for the Alcons I'm running on the front. Could it be the pads rattling in the calipers or the disks rattling on the bells? Or all of the above. Has anybody who's running Alcons suffered the same issue and resolved it? Or is it something I have to live with?

A quick peak through the front wheel tells me that I do have anti rattle springs fitted in the caliper. Well the offside one at least, I never checked the near side.

I notice from this month's EVO David Yu may be suffering from the same issue.

Any advice would be greatly appreciated.

Cheers

Gregor[/quote]

Rick H · 05-03-2015, 02:07 PM

Mine don't do that.

They clank a bit here and there on light application - eg pulling on to the drive or in car parks but otherwise no real noise from them.

They are the Alcon Extreme discs which I think are semi floating rather than fully floating.

GregorFuk · 05-03-2015, 02:14 PM

Mine were bought second hand by the previous owner from a register member. I assume they came from shane@mbtech.

http://www.cslregister.com/forum/sho...ighlight=alcon

**shimmy** · 05-03-2015, 02:36 PM

You might be missing some pad retains clips like on the APs

azrael · 05-03-2015, 03:16 PM

If they are floating then you would hear them with the windows up (but yes bag of spanners). Possibly just clips as shim says if its quieter than that

05-03-2015, 01:37 PM	#1
GregorFuk S5 - Full Throttle Join Date: Nov 2014 Posts: 318 Casino cash: $11097	Rattle, Rattle, Rattle. Alcons? I'm loving my CSL but if I put the window down when running at low speed on a bumpy surface it sounds like a bag of spanners! Not Good. However. I've noticed that just the lightest touch on the brake pedal will stop the rattling. This makes me think that the noise is coming for the Alcons I'm running on the front. Could it be the pads rattling in the calipers or the disks rattling on the bells? Or all of the above. Has anybody who's running Alcons suffered the same issue and resolved it? Or is it something I have to live with? A quick peak through the front wheel tells me that I do have anti rattle springs fitted in the caliper. Well the offside one at least, I never checked the near side. I notice from this month's EVO David Yu may be suffering from the same issue. Any advice would be greatly appreciated. Cheers Gregor

05-03-2015, 02:36 PM	#5
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	You might be missing some pad retains clips like on the APs __________________ .

05-03-2015, 03:16 PM	#6
azrael S5, Sport On, DSC M-track Join Date: Sep 2007 Location: Portsmouth/Reading Posts: 1,292 Casino cash: $9290	If they are floating then you would hear them with the windows up (but yes bag of spanners). Possibly just clips as shim says if its quieter than that __________________ Ashley Shaeffer BMW - Wooo

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05-03-2015, 01:51 PM	#2
trackm3 S5 - Full Throttle Join Date: Sep 2009 Posts: 411 Casino cash: $18073	Don't you just love floating disks !!!! QUOTE=GregorFuk;179864]I'm loving my CSL but if I put the window down when running at low speed on a bumpy surface it sounds like a bag of spanners! Not Good. However. I've noticed that just the lightest touch on the brake pedal will stop the rattling. This makes me think that the noise is coming for the Alcons I'm running on the front. Could it be the pads rattling in the calipers or the disks rattling on the bells? Or all of the above. Has anybody who's running Alcons suffered the same issue and resolved it? Or is it something I have to live with? A quick peak through the front wheel tells me that I do have anti rattle springs fitted in the caliper. Well the offside one at least, I never checked the near side. I notice from this month's EVO David Yu may be suffering from the same issue. Any advice would be greatly appreciated. Cheers Gregor[/quote]

05-03-2015, 02:07 PM	#3
Rick H S5, Sport Off, DSC M-track Join Date: Oct 2012 Location: The North West Posts: 801 Casino cash: $12295	Mine don't do that. They clank a bit here and there on light application - eg pulling on to the drive or in car parks but otherwise no real noise from them. They are the Alcon Extreme discs which I think are semi floating rather than fully floating.

05-03-2015, 02:14 PM	#4
GregorFuk S5 - Full Throttle Join Date: Nov 2014 Posts: 318 Casino cash: $11097	Mine were bought second hand by the previous owner from a register member. I assume they came from shane@mbtech. http://www.cslregister.com/forum/sho...ighlight=alcon