Strange noise from VW brakes.

[Burnerman]

I agree....but we still don't know if the caliper piston is free or not.
John

 

[JohnD]

Hi J,
The intial clean involded stripping the moving parts down, using degrease kit for the pads etc, clean pins etc and re-assemble. As mentioned this cured the noise for app 4 days.
C

Pistons?

 

[YorkshireMidge]

Check the disks. I've known crusty outside edges on old worn disks cause some interesting noises. Also check the inward facing side for surface rust as @Burnerman has already suggested, which might indicate a sticking pad or piston - as problems are often hidden by the stone guards. On the subject of stone guards, make sure there is nothing lodged behind them and make sure they are secure. They are thin metal, get hit with stones as the name suggests, and have a nice habit of rotting and disintegrating on VW group cars, where they can make contact with the disk or even jam against it.

 

[camerart]

I agree....but we still don't know if the caliper piston is free or not.
John

Hi B,
If the noise is coming from the pistons, I doubt that the water jets, would affect them, do you?
C

 

[camerart]

Check the disks. I've known crusty outside edges on old worn disks cause some interesting noises. Also check the inward facing side for surface rust as @Burnerman has already suggested, which might indicate a sticking pad or piston - as problems are often hidden by the stone guards. On the subject of stone guards, make sure there is nothing lodged behind them and make sure they are secure. They are thin metal, get hit with stones as the name suggests, and have a nice habit of rotting and disintegrating on VW group cars, where they can make contact with the disk or even jam against it.

Hi Y,
This car is in Canada, and I'm now in England, so I can't do much about it now.
C

 

[camerart]

As above, I passed on all of yoru comments, which will be told to the mechanic foreman, if the noise returns after the car wash.
Thanks.
C.

 

[Burnerman]

If there is any binding or excess dust build up, a quick wash will act as a lubricant and disguise the symptoms for a short time.
We'll be interested to hear the outcome!
John