Rattle, Rattle, Rattle. Alcons? - Page 2

GregorFuk · 13-03-2015, 02:36 PM

I thought I'd provide an update on this. I had a good look over my Alcons and couldn't find any play that would cause the type of noise I'm experiencing so I spent a further evening under the car with my rubber mallet, crowbar, and screwdriver, knocking and prying at everything I could think of.

And....

I 'think' I've tracked the noise down. It's coming from the inner pads on my rear brakes. They are just sitting loosely in the calipers and can quite easily rattle up and down. A quick Google shows that this is not such an uncommon event so I'm going to spend this evening pulling the rear calipers apart and seeing what the score with my pads are. I will report back.

Nikey30 · 13-03-2015, 06:30 PM

I had exactly the same issue with the rears on my AP set up, at low speeds it sounded terrible. Anti rattle clips were installed correctly but I was advised these can lose their tension after a while.

In addition I found that AP make what looks like a small foam sticky shim which I had fitted and which in addition to replacing clips with new ones have stopped the rattle.

The shims were pence to buy, one of the cheapest mods ever made!

**glendog74** · 13-03-2015, 11:15 PM

Quote:

Originally Posted by Nikey30

In addition I found that AP make what looks like a small foam sticky shim which I had fitted and which in addition to replacing clips with new ones have stopped the rattle.

The shims were pence to buy, one of the cheapest mods ever made!

Do you have a link or part number for the shims? TVM

**shimmy** · 13-03-2015, 11:42 PM

Quote:

Originally Posted by glendog74

Do you have a link or part number for the shims? TVM

my APs have never rattled

Nikey30 · 14-03-2015, 12:50 AM

I will take a look at my invoice and let you know

GregorFuk · 14-03-2015, 01:35 AM

So mystery solved. Both of my inner rear pads are missing the spring that holds them onto the rear brake piston. As shown below:

This leaves the pads free to rattle around in the callipers and create the noise I'm hearing. I'm kind of pissed about this as the pads have plenty of life left and being Pagid RS4-2s are not inexpensive.

So I have a few choices.

1. Live with the noise.
2. Replace pads with new set of RS4-2s
3. Replace pads with bogo Pagids from Eurocarparts.

Option 1 isn't really an option but I'd happily go with option 3 if I thought I was't going to notice a major loss in stopping ability. I do plan to do a few track days this summer but probably no more than two or three. Is splashing the cash an a new set of RS4-2s worth it and if so where do I get them? A quick Google and it seems front pads are easy to find, rears less so.

rstoughy · 14-03-2015, 10:28 PM

I'd leave it as is.

GregorFuk · 17-03-2015, 12:49 PM

Quote:

Originally Posted by rstoughy

I'd leave it as is.

I've come round to your way of thinking Paul. I never noticed the noise as I blasted up the Lecht on Sunday evening.

14-03-2015, 10:28 PM	#17
rstoughy S6, Sport On, Traction Off Join Date: Jun 2008 Location: Aberdeenshire Posts: 1,947 Casino cash: $25387	I'd leave it as is. __________________ Paul. Ooooft!!! 15yrs in the CSL and still loving it "shine on you crazy diamond"

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13-03-2015, 02:36 PM	#11
GregorFuk S5 - Full Throttle Join Date: Nov 2014 Posts: 318 Casino cash: $11097	I thought I'd provide an update on this. I had a good look over my Alcons and couldn't find any play that would cause the type of noise I'm experiencing so I spent a further evening under the car with my rubber mallet, crowbar, and screwdriver, knocking and prying at everything I could think of. And.... I 'think' I've tracked the noise down. It's coming from the inner pads on my rear brakes. They are just sitting loosely in the calipers and can quite easily rattle up and down. A quick Google shows that this is not such an uncommon event so I'm going to spend this evening pulling the rear calipers apart and seeing what the score with my pads are. I will report back.

13-03-2015, 06:30 PM	#12
Nikey30 S2 - Picking it up Join Date: Oct 2007 Location: Isle of Man Posts: 73 Casino cash: $10979	I had exactly the same issue with the rears on my AP set up, at low speeds it sounded terrible. Anti rattle clips were installed correctly but I was advised these can lose their tension after a while. In addition I found that AP make what looks like a small foam sticky shim which I had fitted and which in addition to replacing clips with new ones have stopped the rattle. The shims were pence to buy, one of the cheapest mods ever made!

14-03-2015, 12:50 AM	#15
Nikey30 S2 - Picking it up Join Date: Oct 2007 Location: Isle of Man Posts: 73 Casino cash: $10979	I will take a look at my invoice and let you know

14-03-2015, 01:35 AM	#16
GregorFuk S5 - Full Throttle Join Date: Nov 2014 Posts: 318 Casino cash: $11097	So mystery solved. Both of my inner rear pads are missing the spring that holds them onto the rear brake piston. As shown below: This leaves the pads free to rattle around in the callipers and create the noise I'm hearing. I'm kind of pissed about this as the pads have plenty of life left and being Pagid RS4-2s are not inexpensive. So I have a few choices. 1. Live with the noise. 2. Replace pads with new set of RS4-2s 3. Replace pads with bogo Pagids from Eurocarparts. Option 1 isn't really an option but I'd happily go with option 3 if I thought I was't going to notice a major loss in stopping ability. I do plan to do a few track days this summer but probably no more than two or three. Is splashing the cash an a new set of RS4-2s worth it and if so where do I get them? A quick Google and it seems front pads are easy to find, rears less so.