Corroded brake discs

Faults and Technical chat for the Jaguar F-Pace.
Deltasierra
Posts: 242
Joined: Sun Jun 19, 2016 5:33 pm
Location: Warwick UK

Re: Corroded brake discs

Post by Deltasierra » Thu Aug 02, 2018 7:41 am

I would be very interested to hear what corrosion protection could be added to brake discs, the brake pads would remove it on day one and the unrubbed area needs to withstand high temperature. Brake discs are not rocket science, of the many vehicles I've had over the years ALL discs have completed a normal life of 50k to 80k miles and that includes a couple of XKs that were 15 yrs old, so what has changed?.
FPace 3.0D Portfolio Loire Blue, light interior, tow bar. No issues a very good car
Gone F Pace Prestige 2 liter Auto, tow bar, reversing camera, 14 way seats, 18 inch all season tyres
XKR Convertible


yoda
Posts: 13
Joined: Thu Oct 06, 2016 3:17 pm

Re: Corroded brake discs

Post by yoda » Tue Aug 21, 2018 6:46 pm

Got all mine replaced under warranty after arguing it was a defect and not down to 'normal' wear n tear or corrosion. The braking performance was rubbish.I believe the material is defective. After a further year, my front discs are fine but the rear are going the same way.

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2017-08-29 12.54.30.jpg



Jim
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Joined: Wed Sep 21, 2016 6:17 pm
Location: Telford, Shropshire

Re: Corroded brake discs

Post by Jim » Wed Aug 22, 2018 4:20 pm

Yoda, that does not look good. The pads appear to only be contacting a small area of each disk on the surface that is visible. Have you had the car serviced and the pads and disks inspected as ok?

My disks (the visible side at least) show roughly even wear across the whole surface that is swept by the pads.
Oct 2016 - 2.0 D, Portfolio, Auto, AWD, Ultimate Black, Light Oyster, 14-Way Front Seats with Passenger and Drivers memory pack, electrically adjustable steering wheel, 360⁰ parking aid, ICTP 380W, LED headlights, remote rear seat release.


yoda
Posts: 13
Joined: Thu Oct 06, 2016 3:17 pm

Re: Corroded brake discs

Post by yoda » Wed Aug 22, 2018 8:10 pm

The dealer noted them as 'corroded' but stated that it didn't affect the braking performance - I disagreed as it is obvious that the pads were not contacting a large part of the disc face correctly. I had to take it up with JLR direct, sending pictures of the discs and with a push, they then changed all four discs and pads. Thankfully the front discs have been OK since, but the rears are showing a similar wear pattern, although not as extensive. I think it must be either poor pad or poor disc material (or both). I think I will be looking for the rear discs and pads to be changed under warranty again.


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Katoaristera
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Location: Monaco Principality
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Re: Corroded brake discs

Post by Katoaristera » Thu Aug 23, 2018 6:20 am

And what do you think about this, car having 15 month :

70D42CB2-F0E9-4D88-B60D-608F1FD9AF2B.jpeg

1E995A94-49A7-45DA-921B-738751096C72.jpeg

PORTFOLIO MY18 CUP COVER V6D, Carpathian grey, Espresso+SatinAsh, 20"VenomBlack, BlackPack+Ad.Dyn.+Adv.ParkAss.Surr.Camera, 10/4 way Lumb.Clima front+HeatedReclin.RearSeats, SlidingPano, Gest.Tailg., ICTP, Detach.TowBar, 19" spare wheel, 4G SIM


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catwoman
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Re: Corroded brake discs

Post by catwoman » Thu Aug 23, 2018 9:59 am

Katoaristera wrote:
Thu Aug 23, 2018 6:20 am
And what do you think about this, car having 15 month
Hey Robertino, looks like the salty sea air of Monaco might be taking it's toll on those flaky rims! :cry: . . my car is a year older than yours and mine are still smooth, don't look anything like that.
8-) . . been enjoying since July '16, 2.0d R-Sport, Ammonite + Black Pack, Jet/Red interior and a few useful options


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Katoaristera
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Re: Corroded brake discs

Post by Katoaristera » Thu Aug 23, 2018 9:33 pm

catwoman wrote:
Thu Aug 23, 2018 9:59 am
my car is a year older than yours and mine are still smooth, don't look anything like that.
:roll:
PORTFOLIO MY18 CUP COVER V6D, Carpathian grey, Espresso+SatinAsh, 20"VenomBlack, BlackPack+Ad.Dyn.+Adv.ParkAss.Surr.Camera, 10/4 way Lumb.Clima front+HeatedReclin.RearSeats, SlidingPano, Gest.Tailg., ICTP, Detach.TowBar, 19" spare wheel, 4G SIM


Hydrajaws
Posts: 397
Joined: Tue May 24, 2016 9:10 pm
Location: Nottingham

Re: Corroded brake discs

Post by Hydrajaws » Thu Aug 23, 2018 10:38 pm

The brake discs shown here are similar to those on my 6 month old XF Sportbrake which have just been replaced under warranty.Goodness know what they would have looked like if the car had gone through a winter with wet salted roads.
The department responsible for purchasing components like this at JLR needs a wake up call.
Regretfully 2 Rejected F Paces behind me but now happily driving a 2018. 2.0 D 240 AWD XF Sportbrake in caesium blue.
Summer car 2006 XK 4.2 Convertible.


Deltasierra
Posts: 242
Joined: Sun Jun 19, 2016 5:33 pm
Location: Warwick UK

Re: Corroded brake discs

Post by Deltasierra » Fri Aug 24, 2018 8:33 am

chris wrote:
Thu Aug 02, 2018 12:32 am
Work for Tata ( Previously British Steel and Corus ) with 42 years in Metallurgy and Quality Control areas. So yes I really do know what I'm talking about. :D
OK Chris as you are a guy who knows metals.
Cast Iron has been used for brake discs for donkeys years, it in inherently corrosion resistant and ought to last a reasonable time
What are suppliers doing that causes corrosion.
FPace 3.0D Portfolio Loire Blue, light interior, tow bar. No issues a very good car
Gone F Pace Prestige 2 liter Auto, tow bar, reversing camera, 14 way seats, 18 inch all season tyres
XKR Convertible


Deltasierra
Posts: 242
Joined: Sun Jun 19, 2016 5:33 pm
Location: Warwick UK

Re: Corroded brake discs

Post by Deltasierra » Fri Aug 24, 2018 8:50 am

Katoaristera

The braking surfaces on these discs are fine as they should be, it's the perimeter that has corroded. The dangerous problem is corrosion of the braking surface as others have shown

It looks to me that you have got the brakes seriously hot and blistered the paint, then living in a seaside town as you do corrosion has started. Catwoman on the other hand is a less enthusiastic driver with pristine discs despite living in the hills up north
FPace 3.0D Portfolio Loire Blue, light interior, tow bar. No issues a very good car
Gone F Pace Prestige 2 liter Auto, tow bar, reversing camera, 14 way seats, 18 inch all season tyres
XKR Convertible


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