Chalky

Just put a set on late May, did three 15 minute sessions and then drove on street . I had a rotor split today.

I can replace but if they are warrantied, I'll take advantage of it.

CHJ In Virginia

NAPA does not give a warranty on rotors that I know of. You can always take it back to the local store with your purchase receipt and claim that it was defective. Don't mention anything about the track day or they will just laugh at you. It's worth a try.

WNDOPDLR

OR you can do the stand-up thing and chalk it up to track expense. Using a car hard takes it's toll on parts. You rotor may have died prematurely or maybe it was not seasoned properly. There are lots of reasons for parts failure, but bogus warranty items affect us all eventually in the costs we pay.

Wicked Weasel

between us this weekend we went through 3 new rotors (1 on 3 different cars). I would not think of returning them to NAPA

Besides I think the metal changing colors would be a dead giveaway that they were raced

John Shiels

seasoning helps. Doubt they will do squat.

Maineiac

Too Tall Bob

Hey! Don't give up! Three weeks ago while out at the new Miller Motorsports Park, I warped two rotors and cracked the other two. Took the two cracked ones back to my Napa parts guy, laid them on the counter, and he gave me credit for two new ones that I had ordered. And yes...I told him how it happened. He said anytime it happens again to bring them back. Best $25 I have ever spent!

It's just too bad that I threw away all those other bad Napa rotors before trying to take them back.

Chalky

Yea, I'm out to rip NAPA off for $28.00. Please give me a break. Just a simple question.

I've warped plenty of rotors, but never had one crack like this.

Chalky

Thanks for the info. I'll be ordering two more rotors for a session In October. I'll check out their policy when I place the order

I think it was AutoZone that used to have a lifetime warranty on a performance brake pad. You wear it out, they replaced it, no question. If NAPA wants to extend a warranty on their rotors, that makes them an even better deal!!

meldog21

I had two Carbotech slotted rear rotors crack after only two 15 minute sessions. I was not even driving very fast since I was having trouble with the transmission. They both cracked exactly the same way, through a slot on each one. I had Napa rotors on the front, they were fine.

I called Carbotech, they credited me for the two rotors. Carbotech's rotors may have failed prematurely, but their customer service didn't. Their pads seem to work pretty good too.

I've learned my lesson, no slotted rotors! I already knew about drilled, but I guess any modification of the surface can cause cracks.

Dog

AU N EGL

Seasoning rotors is very important. But rember rotors dont crack on the track, they crack in the paddock from improper cool down. Mostly from sitting next to the HOT brake pad, while the part of the rotor NOT near the hot pads cool at a faster rate, then - TING - Sound of cracking rotors.

greendot

Dead on, once again. Been there, heard that

Wicked Weasel

One of our rotors cracked after 2 sessions. We felt it was because after running hard for a few laps they pulled a black flag on us right next to the pit. The session was over, but we never got a cool down lap. Usually during the cool down lap I try to do the course with little to no braking which I think helps a ton. Air is cooling both the brakes and the rotors.

We did drive around the paddock area for a few mins to cool the cars down, but the rotor still cracked.

VetteDrmr

Yeah, AZ *used* to have that warrenty. Now it's two years. IMO, I'd take them back to NAPA, tell them what you were doing, and see what they do. I have no problem using a warrenty, but I'm always up front with them about how it happened.

I've never had my local AZ turn me down.

Have a good one,
Mike

greendot

Yup, that sucks. You might try also throwing a towel or something like that over the tire/wheel to prevent air from blowing over it and that would keep the cool down more consistent, even though slower. Just be sure to check you brake pedal before you take off in case you heat soaked the fluid. It's a trade off.

WNDOPDLR

It was not your post I was commenting on. If NAPA offers a warrranty, then by all means take advantage of it, but, to your point, it isn't worth lying about for $28.00. Looks to me as though we are in agreement.

Chalky

John Shiels

I had the air blow into a DRM duct (reverse) when the car was sitting after a session. The result was the rotor was so hot the duct melted and partially collapsed

J.R.

The key: Read AU N GEL's post numerous times.

Cool down lap.

Do not use parking brake when in pits.

After car sits for a couple of minutes roll tire 180 degrees or 120 degrees twice after another couple of minutes. This lets rotor cool down more evenly.

This is the same protocol I use with my race car, obviously no parking brake, and I have not had any rotor issues except for maybe an off track excursion.

Jason

I think I'd just chalk it up to life on the track. Just be glad it wasn't something expensive or hard to get to for once.