Brake pad errosion?

supton

supton

Joined
Nov 9, 2008
Messages
25,912
Location
NH
2021 Camry Hybrid, garage did safety inspection this week, told me that I had a thin brake pad. Thin indeed--surprised they passed me. I did a pad slap with Carquests 18months/33kmiles ago as it did the same thing, rust gumming up the works and the electric parking brake cramming it together (not from hard braking).
1740261976886.webp


The other side of the char still has 3/4 of the pad lining left. Pins are sticky but they always are. I'm 99% sure that I lubed these brakes last spring but I should check the log and make sure--if I missed that, then it's all on me.

What I don't get is why are chunks missing? The good pad had a piece missing.
1740262056028.webp


The bad pad is truly bad--maybe it got cooked? Looks rough and lots of the corners are gone.
1740262087428.webp


1740262108321.webp


1740262138106.webp


The good pad side of the rotor has some ridges on the rotor, but I think that is from when I pad slapped this. I should try to knock that down. That's an OEM rotor with 93k on it, not quite 4 years old.
1740262273870.webp


*

Should I go back to OEM pads? I'm not sure if I want to run to Advanced for another set of pads, or just put this back together and order new pads, and install next weekend. There's still at least 232 miles left on that bad bad I bet, that's enough for the week.
 
supton said:
2021 Camry Hybrid, garage did safety inspection this week, told me that I had a thin brake pad. Thin indeed--surprised they passed me. I did a pad slap with Carquests 18months/33kmiles ago as it did the same thing, rust gumming up the works and the electric parking brake cramming it together (not from hard braking).
View attachment 264836

The other side of the char still has 3/4 of the pad lining left. Pins are sticky but they always are. I'm 99% sure that I lubed these brakes last spring but I should check the log and make sure--if I missed that, then it's all on me.

What I don't get is why are chunks missing? The good pad had a piece missing.
View attachment 264837

The bad pad is truly bad--maybe it got cooked? Looks rough and lots of the corners are gone.
View attachment 264839

View attachment 264840

View attachment 264841

The good pad side of the rotor has some ridges on the rotor, but I think that is from when I pad slapped this. I should try to knock that down. That's an OEM rotor with 93k on it, not quite 4 years old.
View attachment 264842

*

Should I go back to OEM pads? I'm not sure if I want to run to Advanced for another set of pads, or just put this back together and order new pads, and install next weekend. There's still at least 232 miles left on that bad bad I bet, that's enough for the week.
Click to expand...

that's from overheating, very common on stuck pads. it also *causes* extra rust on the backing plate. That's what the Hyundai pads and discs looked like if the brakes didn't get serviced
 
Nrs brake pads makes zinc coated rust resistant brake pads.
Originally they were made for tesla because of regeneration braking the pads would be barley used and started to rust before wearing out.
 
Living in Ohio is the reason I do brake jobs well before the pads actually need it. Especially with the horrid winter we’ve had, more so the month of February.
 
Mcbeem5 said:
That Rotor is SHOT !! It will tear up new pads.
Click to expand...
Its not that bad. I usually wait until it looks like a record. Besides. What is a replacement going to be like in 4 years? no different.
 
Rust grooves can negatively impact braking performance by reducing the contact area between the brake pads and the rotor, leading to longer stopping distances and decreased braking power. Additionally, grooves can cause uneven wear on the brake pads and the rotor, increasing maintenance costs as they need to be replaced more frequently.
 
It looks like that caliper has issues as it seems one pad is worn out while the other has material. I'd investigate that and replace both rotors on the axle. Go back to factory pads and rotors.
 
KrisZ said:
They were dragging and got overheated. What brake lube are you using? The pins should not be sticking after only one year.
Click to expand...
Pins were not sticking—it was rust jacking under the pad ears, under the stainless steel shim whatevers. I usually try to smear Honda M77under there, are cleaning, but I think I recall skimping last time.

I just need to inspect more often. Every six months maybe. Really wish I had a lift!
 
supton said:
Pins were not sticking—it was rust jacking under the pad ears, under the stainless steel shim whatevers. I usually try to smear Honda M77under there, are cleaning, but I think I recall skimping last time.

I just need to inspect more often. Every six months maybe. Really wish I had a lift!
Click to expand...
Look at the maxjax lift. Best ROI purchase I ever made.
 
Your brake hose will eventually go out or is already in the process of going out.

All parts in the brake system do the job of heatsinking away the heat. Rust can build up in the bracket where the pad sits, making things move less smoothly. Loss of rotor material can eventually play a role as well. Your car is relatively young though, so the calipers and rotors are not yet part of the problem. The rust has rapidly infiltrated the caliper bracket, and that can literally change the angle the pad wants "to be at" when installing the pad(personal experience).

That's why I silicone greased brand new calipers in the bracket area for a Toyota Matrix. One reason is to see if basic plumbing protection also applies to car. Two, to see if a perfect rust proofer already exists under the market's noses.
 
You must log in or register to reply here.

Similar threads

R
packaged rotors - rust during storage?
2
Replies
20
Views
651
FTTSHO
Number_35
2012 Chevy Sonic - Brake Rotor Rusted On
Replies
4
Views
313
Number_35
N
Gambling with non-OEM brake pads?
2 3 4
Replies
77
Views
3K
50yr Street Mech
Twisted1
Does this look like a sticking caliper?
Replies
9
Views
517
ka9mnx
Twisted1
Chasing a rubbing noise on my Camry
Replies
3
Views
264
Twisted1
Back
Top Bottom