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Cracked brake disc -

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Voug

Member Since: 03 Dec 2010
Location: Somewhere between East and West
Posts: 195

2011 Discovery 4 3.0 TDV6 HSE Auto Baltic Blue

Cracked brake disc -

Hello everyone,
i changed my rear brake discs 6 weeks ago according to Bodsy's brake bible. Everything went fine, but last week a screaching noise appeared when applying the foot brake. Yesterday i checked the noisy left rear brake and found two cracks within the disc

Neither the mechanic guy at the local dealer nor a friend of mine - also car mechanic for 30 years - has an explanation what caused this failure. Both have no explanation for the blank places in the drum which are obviously the origin of the cracks.

Does anyone have a clue ?

BTW: The use of the EPB is very rare and there was NO screaching noise when applying ...

Here are some photos:

Click image to enlarge

18th Apr 2016 8:44 pm

galwaygreen

Member Since: 30 Oct 2011
Location: plymouth
Posts: 6525

2016 Discovery 4 3.0 TDV6 Graphite LE Auto Loire Blue

scary...never seen the like of that before

18th Apr 2016 8:49 pm

DSL
Keeper of the wheelie bin

Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72918

What brand of disc?

18th Apr 2016 8:50 pm

Voug

Member Since: 03 Dec 2010
Location: Somewhere between East and West
Posts: 195

DSL wrote:
What brand of disc?

Manufacturer is ATE. Came with original glued package.

18th Apr 2016 9:07 pm

Cellerdweller

Member Since: 05 Oct 2012
Location: Macclesfield
Posts: 1315

I think it would be interesting to see what the run out of the drum is ,it certainly looks like it has some high spots . You're not afraid of the dark are you ?

18th Apr 2016 9:15 pm

rrhool

Member Since: 28 Aug 2014
Location: Norfolk
Posts: 4446

2007 Discovery 3 TDV6 SE Manual Zermatt Silver

That's a plain and simple manufacturing fault.
Casting issue or heat treatment issue.

Take them back. ATE should be ok, they are part of the Continental group. Richard

D3 SE 2007. Triumph 2.5Pi 1973. Ferguson TEA20 1948.

Discovery 2 4.0 ES 2001- Gone
Discovery 1 300Tdi ES '95 - Gone
Range Rover Classic '79 - Gone

18th Apr 2016 9:38 pm

L319

Member Since: 14 Dec 2013
Location: Herefordshire
Posts: 2080

2005 Discovery 3 TDV6 HSE Auto Buckingham Blue

Looks like a casting fault, probably not cooled correctly creating a stress that has finally let go. ATE started as Alfred Tevis in 1906

18th Apr 2016 10:19 pm

highlands

Member Since: 11 Jan 2010
Location: NW Highlands
Posts: 5098

2005 Discovery 3 TDV6 HSE Auto Java Black

Have you tried putting in the TecIdentify code to check they are genuine ATE discs?

http://interact.teccom-eu.net/TecIdentify/Default.aspx Black 05 TDV6 HSE Auto
Grey 05 TDV6 HSE Auto (Gone)
54 TDV6 SE Man (killed by me

)

18th Apr 2016 10:22 pm

lynalldiscovery

Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti Grey

I have to say the pad friction area of the disc also looks quite worn as well, certainly more than 6 weeks worth.
Any idea what make the pads were?
Is the bubbling paint on the epb shoes corrosion or heat related?

19th Apr 2016 6:59 am

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