Holes in pads (not GMT400)

[0xDEADBEEF]

These are the old brake pads from my C8. Never seen this before and all 8 pads are like this. I compared to the new pads and it appears these holes hold some kind of substance. I'm curious what it was and what is it supposed to do. I'm wondering if these were supposed to be used with a shim and this stuff was supposed to bond to that. I dunno.

I posted this on the Corvette forum but the ratio of people that turn wrenches to those that polish and shine is not great, so I thought I would try here.

You must be registered for see images attach

 

[Vikingdude]

Just the backing plate right? It doesn't look like they go through the friction material. A blind guess on my part is harmonic resonance, but I'm definitely no engineer. I'll await the more informed among us to correct me.

 

[0xDEADBEEF]

I'm a dumbass. They are rivets. The new pads have something to cover those holes. Maybe epoxy or something to prevent water from getting in.

On the new pads, that uh ... "mushroom" looking stumpy thing that is cutout was full of the same stuff. I didn't take pictures.

 

[GoToGuy]

First I expanded your photos , hmm looks like like rolled tube rivet. Oh yeah, he found it.

 

[454cid]

I don't think I've seen rivets on pads, just shoes.

 

[movietvet]

Been in the repair industry long enough, I have, and you will see riveted shoes and pads. One of the rivets would also hold the "squealer tab" that was a depth gauge to warn against getting into the rivets. I have seen a lot of rotors, where people would bend the squealer tab away from rotor surface and then eventually the pad got thin enough that there was a rivet groove in the rotor surface.

 

[0xDEADBEEF]

These are aftermarket track oriented pads. Think I'm going to buy a different brand next time as I found some spots where you can see the friction material and backing pad were slightly separated.

I did get 3 weekends out of them so they're not junk, but they really didn't perform well that last day and cost me some track time.

 

[Erik the Awful]

3 weekends = how many laps?

 

[0xDEADBEEF]

3 weekends = how many laps?

I don't keep count of that. If it was nothing but full sessions, at COTA I would estimate 40-45 per day and probably 45-50 at ECR.