This came up in my feed and thought it was relevant to this .
CK5
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Brake problem input
- Thread starter dyeager535
- Start date
cool info. Now I am wondering about the pads I used on the 01 burb since they are from O Reilly's, least they aren't the budget level pads.
The heated up failed example did resemble @dyeager535 failed pad. Maybe a combine of over heat and water intrusion cause the failure.
The heated up failed example did resemble @dyeager535 failed pad. Maybe a combine of over heat and water intrusion cause the failure.
He did mention briefly that rust can creep in from the edges of the pad and get underneath.
I sent an email to Power stop tech to find out if new pads I used on the 77 are mechanical or glue. They don't say on the part number description.
power Stop replied quickly but these may be the last truck pads I get from them, I specifically asked about 1 part number the z23-052 for our trucks, but the reply was generic passenger car.
Hello Mike,
The prefix "Z" does not have anything to do with the adhesion of the pad friction material to the backing plate. This is just a prefix for our part numbers for pads. (i.e. Z36, Z23, Z26 etc) Information for the adhesion of our pads is below. Let me know if you should require any further information.
James
Adhesive Attachment Response:
“PowerStop passenger vehicle brake pads utilize an adhesive to bond the positive molded friction material to the backing plate, as well as IM holes. This adhesive creates a strong bond that ensures our friction material will not separate from the backing plate during the service life of the pad.
To check the quality of this bond, we test the shear strength of our brake pads using SAE J840 and ISO 6312 testing standards to confirm our materials far exceed the ECE R90 Minimum Acceptable sheer strength specification.”
Hello Mike,
The prefix "Z" does not have anything to do with the adhesion of the pad friction material to the backing plate. This is just a prefix for our part numbers for pads. (i.e. Z36, Z23, Z26 etc) Information for the adhesion of our pads is below. Let me know if you should require any further information.
James
Adhesive Attachment Response:
“PowerStop passenger vehicle brake pads utilize an adhesive to bond the positive molded friction material to the backing plate, as well as IM holes. This adhesive creates a strong bond that ensures our friction material will not separate from the backing plate during the service life of the pad.
To check the quality of this bond, we test the shear strength of our brake pads using SAE J840 and ISO 6312 testing standards to confirm our materials far exceed the ECE R90 Minimum Acceptable sheer strength specification.”
That 'z' designation is part of that engineering standards manual. FSMI https://fmsi.org/ Not necessarily the same part numbers we get as consumers.
But still, good info from Powerstop and good on them for being honest, even if it's not the answer you necessarily want.
But still, good info from Powerstop and good on them for being honest, even if it's not the answer you necessarily want.
Apparentl;y Bosch (per one of their 2017 flyers) only uses glue as well.
I don't think I'm too concerned, but that's because of how infrequently I use this thing. Then again, they did fail in a way I don't think they should. The pads should work until the friction material is gone.
Still disappointing we've gotten away from any sort of mechanical attachment, even on branded parts.
I don't think I'm too concerned, but that's because of how infrequently I use this thing. Then again, they did fail in a way I don't think they should. The pads should work until the friction material is gone.
Still disappointing we've gotten away from any sort of mechanical attachment, even on branded parts.
I think your particular failure was something he briefly touched on, with the backer coating failing and rust seeping under the pad material, breaking that bond - at least in part. You also had some material failure by the looks of it.
I don't disagree.
I had one bout of zero engine braking for a very, very long downhill that toasted the wheel bearing grease, so I wouldn't be surprised if that caused at least partial adhesive failure.
I suppose it makes sense that if you can break the adhesive bond to the backer, you can break the adhesive bonds within the friction material itself. Again with such infrequent usage, something that caused damage maybe even ten years ago (I was definitely having the pulling issue, 3+ years back), could certainly catastrophically fail today.
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