RS4EVA

I'm certain I have a few more stones in there too. The brake duct acted like a big scoop

AVETTE

Brakes are one of THE most important safety issues on track. THIS needs to be addressed

yozi

This happened to me as well...upon cooling pedal came back. Off track cooling that is...

Chets LS3

If you lost brakes. That is different than the bleeder issue. You either boiled brake fluid or overused the pads. Most likely a combo of both

yozi

Guys, I left a message for Tony explaining the same issue. I also let him know I am an ex-GT race series driver and have put down 1000's of laps in race cars. My dealer said "You are over using the brakes" Lol

yozi

Yes,I thought the brake fluid was boiling or as you say a combo, but brake use was appropriate and given I needed to drive it home, far from the edge in driving. Went to the Fellows school and had no issues in three days running at the instructor level, so assumed the carbon package and fluid was truly for the track?

RS4EVA

do do you have PDR video?

RS4EVA

They are related. I lost brakes due to fluid leaking out, and air getting in, then they boiled.

Chets LS3

Air is not getting into the system when fluid comes out of the calipers. If air was in the system you would have no brakes. Then you would have to use a module to clear the abs module.

I have pushed out fluid out of the bleeders. When I did it only one other case was apparent on the forum. No one knew what was going on. Braking was not affected, I still got slow fade as I pushed the brakes harder and harder. I had motul fluid then onto Castrol srf. These brakes need srf if you go fast simple as that. I boiled motul multiple times.

With srf and hawk dtc 70s I could still fade the brakes and kill a set of pads in 2-3 days.

Back to the bleeders, I got the calipers changed by gm and checked the spec of the bleeders (tightened to spec) pushed fluid again. I think once enough pressure is built up in the caliper the fluid slowly comes out and makes its way through the threads. It basically turned the caliper to crap!

I teflon taped my bleeders and have had 0 issues since. I can assure you when this happens air is not getting into the calipers though.

Chets LS3

It doesn't take a whole lot to overuse the brakes on the z51 car. The z06 brakes which I have now are an improvement but not an ap caliper With strong pads and great fluid, I can still fade the brakes.

It was much more apparent at spring mountain running a street pad and not as high quality fluid.

jvp

Folks -

This question hasn't been forgotten. Tadge assures me he'll have an answer, but I just can't say when as I don't know.

Thejoyofdriving

Not to get too off track(no pun intended) but I went to SM I specifically asked them if they were using the OEM pads in the Z51 cars since I noticed the school is sponsored by Hawk. They said that they are definitely not the stock pads and are using a Hawk race compound.

This question gets my vote, very serious safety issue.

5thGear

I expected this question would take sometime to anwser. I assume Tadge would get Brembo involved. I had same problem with my 2017 Z07 at the track with fluid leak from bleeders.

vettpapaw

Abuse-NO SOUP FOR YOU!!

traumamed

Resurrecting this old thread to see if anyone had heard of any updates on this. Took my 19 GS (standard GS brakes, not carbon ceramic) to the track for the first time a couple weeks ago and when I was swapping back to street pads, noticed a fairly significant loss of brake fluid from the RF. It was enough that both the inside and outside of the caliper were coated in brake fluid and there was brake fluid sprayed all over the inside of the wheel. Scared me quite a bit tbh because I like to be able to stop! Notably, the outer bleeder screw was missing its cap as though fluid pressure had blown it off. I chalked it up to insufficiently tightening the bleeder screw when I swapped to high-temp fluid. I bled the caliper, put a new cap on the bleeder, and figured I'd keep an eye on it. Well this morning, I took a look at the RF, and sure enough - fluid everywhere again and missing bleeder cap on the outer screw. Car has not been tracked again yet, just light city/highway driving. I have an appointment in a couple days to have this looked at by a dealer as a warranty concern, but if I'm just going to be told to pound sand, I'd rather not waste my time and will address the issue myself.