2015 C7, 3200 miles and my front rotors are turning blue ? what's up with that ?

 

How hard do you drive the car?

Are you letting the stability control system drive the car for you? That will smoke the brakes in a very short period of time.

Is it both rotors or just one?

Beyond the first two things you could have a problem with a caliper(if its one) or something in the brake system that is causing them to hang up.

Do you smell the brakes burning during normal driving?

 

You must be making some high speed stops, possibly coming off the interstate at high speeds.

 

Its both front brake rotors, getting bluer every time I drive. I don't really drive it to hard. I don't really turn off the stability control unless I'm driving hard. Basically should this happen to a new car? Its not like I'm braking at 120 mph.

 

The car is supercharged but that has only been for two days. Have had a few hard stops but that's it.

 

My guess is something else is wrong.

Blue rotors are the results of extremely high heat. A few stops, even from 120mph are not going to do it.

Hard track time will do it, or leaving the stability control on while on track and driving the car poorly, which means the stability control is driving the car and it can ruin brakes quickly and cause a ton of heat.

I would go get a HF laser thermometer. Be interesting to see what the disc temp is if you drove it around for 20-30 minutes, maybe on the freeway, don't use the brakes. Get off the freeway, use the transmission to slow down as much as possible. Only use the brakes at the very end.

You find an open stretch of freeway, drive at 70mph(or whatever your limit is), do no use the brakes. Pull off, use the trans and downshifting to slow. Use the brakes for the last 10-15 mph.

Check with the thermometer. Should be pretty cool, almost ambient temp.

If they are really hot then you have a stuck caliper, pad, or not enough pressure relief in the brake system to retract the pads fully.

It takes quite a bit to blue rotors on the street. If you were doing 120-0 stops yes but if your taking it up to 120 and slowing down to freeway speeds thats not hard on the brakes since they are receiving constant cooling because your moving.

I just saw your post that this is not a Z51...Z51's have cooling ducts and bigger rotors which is what I am basing my comments on. A non-Z51 with smaller rotors and no cooling will retain a lot more heat and those high speed stops may be affecting things quite a bit more than on a Z51 car.

 

Automatic? Perhaps dragging the brakes by resting your left foot on the brake peddle?

 

Its an m7

 

Mine turned purple after I ran a one mile event.
They work fine.
I had to go from 180mph to 20mph in a half mile, which sounds like a lot. This equals purple discs in a base C7.
I will upgrade these brakes, if I continue to run these events.

 

I actually spoke to my dealer today and they are going to warranty them. But seriously 180 to 0 is extreme, I really dont drive the car that hard, i did have a couple of hard stops from 100 to slowing at an off ramp but thats about it. I don't feel that the brakes should turn blue or purple with that type of driving after all it is a sports car, what does GM think we have here ?

 

Any one else having this problem.

 

Two of the forum vendor brake experts are JRitt@essex and Johnny@OG

You might want to PM them. They both answer brake questions in the Autocrossing & Road Racing forum threads.

 

Two of the forum vendor brake experts are JRitt@essex and Johnny@OG

You might want to PM them. They both answer brake questions in the Autocross & Road Racing forum threads.