Why did my disk rotors turn white? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Hags86 · 03-11-2013, 04:36 PM

Hi Everyone

I'm not too worried by this but am curious if anyone else has seen this before.

I took my 10 day old 86 GTS to it's first track day (with under 500kms on the clock). I'd put some Ferodo DS2500 pads on the front brakes and a set of Yokohama Advan A048 semi-slick tyres. Sandown is a pretty hard circuit on brakes.

I didn't have any brake issues all day but did notice the outside of the rotors had turned white. I'd never seen this before and was wondering if it was normal? It doesn't seem to wipe off easily (but I've not removed the wheel and tried hard to clean it.

There was another 86 there and this didn't happen (it was about 1 month old and had OEM tyres and brake pads).

I'm thinking maybe some sort of protective coating that's cooked off. Maybe the new pads?

Your thoughts?

CSG Mike · 03-11-2013, 04:42 PM

You heated the rotors up. Totally normal

On the rotor surface, that looks like a very nice transfer layer/film from the pad.

Come join us at the track subforum here: http://www.ft86club.com/forums/forumdisplay.php?f=39

And, please contribute to the (race) brake pad discussion here: http://www.ft86club.com/forums/showthread.php?t=23680

Hags86 · 03-11-2013, 04:53 PM

Thanks Mike. Will do.

I'll put up a post about my first impressions of the car as a track-day warrior.

03-11-2013, 04:36 PM	#1
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Why did my disk rotors turn white? Hi Everyone I'm not too worried by this but am curious if anyone else has seen this before. I took my 10 day old 86 GTS to it's first track day (with under 500kms on the clock). I'd put some Ferodo DS2500 pads on the front brakes and a set of Yokohama Advan A048 semi-slick tyres. Sandown is a pretty hard circuit on brakes. I didn't have any brake issues all day but did notice the outside of the rotors had turned white. I'd never seen this before and was wondering if it was normal? It doesn't seem to wipe off easily (but I've not removed the wheel and tried hard to clean it. There was another 86 there and this didn't happen (it was about 1 month old and had OEM tyres and brake pads). I'm thinking maybe some sort of protective coating that's cooked off. Maybe the new pads? Your thoughts? Attached Images

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
White LED Turn Signal Bulbs In Stock @ JWM + FREE Shipping	JWMotoring	Exterior Parts - Lighting	84	03-23-2014 09:07 PM
*Group Buy: FR-S LED Turn Signals (Dual Color, White/Regular, Amber/Turning)*	Vicious LED	Groupbuys	293	08-22-2013 06:26 PM
SSR disk sizes	fiveoneone	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	0	12-18-2012 06:17 AM
*FR-S/BRZ LED Turn Signals (6K WHITE/AMBER FOR TURNING, NO HYPER FLASHING!)*	Vicious LED	Exterior Parts - The Rest	7	11-02-2012 11:05 AM
convert drum to disk brakes	DIG1992	Other Vehicles & General Automotive Discussions	2	11-09-2011 06:04 PM

03-11-2013, 04:42 PM	#2
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,561 Thanks: 8,941 Thanked 14,211 Times in 6,854 Posts Mentioned: 970 Post(s) Tagged: 14 Thread(s)	You heated the rotors up. Totally normal On the rotor surface, that looks like a very nice transfer layer/film from the pad. Come join us at the track subforum here: http://www.ft86club.com/forums/forumdisplay.php?f=39 And, please contribute to the (race) brake pad discussion here: http://www.ft86club.com/forums/showthread.php?t=23680

03-11-2013, 04:53 PM	#3
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks Mike. Will do. I'll put up a post about my first impressions of the car as a track-day warrior.

User Name		Remember Me?
Password