Bluish discoloration of brake rotors

[RJFabCab]

Master Tech apparently wants to fail my GT3 on the tech inspection due to "bluish discoloration of the front rotors".

Am I missing something here? Could this discoloration be indicative of a loss of rotor integrity due to significant heat stress?

Sorry, no pics... as I thought the rotors looked just fine... no different than any other set with track miles on 'em.

The rotors are not even close to meeting replacement criteria with respect to thickness, lateral runout, or cracks.

Personally, I think they're A.O.K. but I'd thought I'd look for a litte input.

Cheers

[clord]

Hi RJ.... You didn't say what governing body you are getting teched for....but, in teching for PCA DE's and Club Race.... I see a little bluing on rotors all the time. As you say, the key criteria are remaining thickness, lateral runout, and extension of cracks. On Porsche factory rotors with cast holes, the rule of thumb is to fail a rotor if the cracks begin to meet up with other cracks or extend to the outer edge of the rotor.

[RJFabCab]

Hi RJ.... You didn't say what governing body you are getting teched for....but, in teching for PCA DE's and Club Race.... I see a little bluing on rotors all the time. As you say, the key criteria are remaining thickness, lateral runout, and extension of cracks. On Porsche factory rotors with cast holes, the rule of thumb is to fail a rotor if the cracks begin to meet up with other cracks or extend to the outer edge of the rotor.

Hey, Craig

It's for PCA DE. Perhaps he's not so familiar with track stressed rotors. Who knows. I'm going in this afternoon to have a little chat with him. :huh: