Front brake grinding but only when heavy braking

[bhodgkiss]

Hi All
I have the b8 3.0tdi with 345mm s4 front discs and red stuff pads (which are maybe half worn max)

when I brake hard at high speed, and get it hot, the front right brake starts to grind and give a bump once per rotation

Anplease?

Its done it for the past year

when driving normally it doesn’t do it

 

[Garrett 69]

Sounds like you may have a warped disc.

 

[NHN]

As above, hard breaking of course will heat them up vastly but make a warp more noticeable also imho.

 

[bhodgkiss]

Thanks both
But there is no judder
Just a grinding noise
I don’t think the disc is warped?

 

[ninjag]

I would get the wheel off and inspect. Maybe even remove the pads and check out the surface? My front pads I just changed not only had the metal piston clip snapped off, but the pad on the other side had it's anti-squeal backing plate thingy welded onto the caliper. I suspect they were cheap pads though.

 

[g00se]

I'd defo get everything off and take a look.. if it only happens when hot and really leaning on the brakes, maybe something else expanding and catching?! Is there any odd feel from the peddle?

I ran EBC reds on my old Mk4 R32 Golf and they warped a new set of MTEC disks.. i was not a happy goose. Switched to EBC yellows and have never had an issue since in 12 years.

goose

 

[audiwaterpump]

inner pad may be worn more than the outer one.