Front brake discs starting to stain?

[LloydZee]

Hi everyone

 

I have noticed today that my front discs have started to 'stain' or 'mark' exactly the same as eachother.

It is definitely not a groove as I run my hands across the marks.

 

What could it be? What does it mean?

 

I have EBC Red Stuff pads and standard discs.

 

Cheers in advance.

[BulletMagnet]

Were the pads bedded in properly?

I suggest doing a bed in cycle and see if it improves as I think the discs look very "clean".

After bedding in they should not be shiny as a layer of brake material has been applied.

[Netnomad]

I guess it the groove on the pads, see link below

 

 

http://www.ebay.co.uk/itm/like/290989094446?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=108&ff19=0

[LloydZee]

I bedded them in with 10 x low speed (20 to 5mph) and 10 x 60 to 5 mph stops.

 

This was a few months ago now and they've only just started doing this.

[BulletMagnet]

I guess it the groove on the pads, see link below

 

 

http://www.ebay.co.uk/itm/like/290989094446?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=108&ff19=0

The groove is perpendicular to the direction the disc travels, so I doubt it's the groove

[BulletMagnet]

I bedded them in with 10 x low speed (20 to 5mph) and 10 x 60 to 5 mph stops.

 

This was a few months ago now and they've only just started doing this.

You do have to repeat the procedure as normal braking will remove the layer.

I bed mine in every couple of months (DBA T3 discs and Ferodo DS2500 pads all round)

[LloydZee]

Oh ok, I never realised that.

So you think it's worth re-bedding/heavy braking next time I drive it?

[BulletMagnet]

Yeah, that's the first thing I would try

[LloydZee]

Ok will try that. If not, maybe it's an excuse for uprated discs

[craigm]

It must be the pads if it is the same on each side - i'd pop the pads out and have a look to make sure they are all clean etc

[Daryl]

Take the pads out, and see if there is anything trapped/caught in the pad. I had this, and ended up witha ring, though it was not in the middle like that. When i took the pad out, there was a lump of something holding the pad off, which is what was causing the ring, as the pad was not making 100% contact.

[cmck13]

I agree, first whip off the pads and have a good look, secondly Ive always used this for breaking in procedures.

 

 

http://www.350z-uk.com/index.php?showtopic=18649