[HurstGN]

Ok, I've looked on-line and I've not found anything to help, so I'll ask my trivial question here since I know there are a lot of knowledgeable folks here.

I had to do my brakes a while back, I forget exactly how long ago...I think it's about a year ago, but I decided to do all 4 corners since the brakes were all getting thin on wear. I bought a full front/rear set of pads and rotors from Brakemotive. From initial install till about 2 weeks ago, everything was fine. No noise, smooth stops, no issues at all. I was very pleased with them. A couple weeks ago I heard a noise from the front and thought it was the brakes, but it wasn't the typical high pitched squeal of a wear indicator. It was a lower pitched squeal. I took it into a shop I trust and they checked the front and rear brakes. Plenty of pad material left. It definitely wasn't a noise from the wear indicators. In hopes it may be due to possible glazing on the face of the pads, they scuffed the pads and chamfered the edges a tiny bit and that helped for maybe 10 miles. The noise is just as prominent as before scuffing the pads.

Here are my observations:
When the pads are cool (parked overnight, drive for a bit without using the brakes) there is no noise. I can drive 20 miles without hitting the brakes and they are quiet.
When the brakes heat up (using the brakes going down a long hill, long exit ramp off the highway) the noise starts
When the car comes to a complete stop, the noise stops. It is definitely related to the wheels rotating
When making the noise and coming to a complete stop, let off the brakes and it will continue to make the noise for a bit as I drive off from the stop.
If I need to use the brakes again in rush hour traffic, the noise will continue
Once I get to move free and not use the brakes for a little bit, the noise stops and the brakes need to re-heat up to make noise again.
The heating up is from normal daily driver braking...not heavy braking like autocross, racing, etc.
At no time when the noise is present do the brakes feel any different. Still good positive stopping power.

Brakemotive said they have had some noise complaints when ceramic pads are cool, but never once heated up. Mine are doing the exact opposite. What I found on-line about ceramics said the same thing, if they make noise, it will be when cool, not hot. The Brakemotive warranty is only 6 months, so no action there. I can buy a replacement set of pads from them for $40, but I don't know if I want those since these are causing me grief outside the warranty period.

So, experts in ceramic pads, does anyone know why I would have a noise problem when the pads heat up? If so, any suggested remedy other than just replacing the pads?

Forgot to add, I have the JE5 brakes.

 

[Submariner409]

For the flip side, I use ceramic pads from EBC - Redstuff. They are dead quiet and strong, stone cold or red hot. Brakemotive looks like a startup company - 100,000 customers (orders) is peanuts. Do you have any idea where the pads are actually made ?

If you hear the noise for some period after releasing the brake pedal and driving away, it might have something to do with one or more calipers releasing slowly - those pistons move only .005" - .010" at each brake application. But that doesn't explain the gradually increasing noise upon successive stops. Hmmmm............

Have you run the car up to 70 or so and done 2 or 3 hard stops in succession, driving away immediately after each stop, then driving at least 3 miles to cool the rotors ? Sometimes that exercise will "scrub" pad resin deposits off the rotor faces.

Some pads supply a silicone/graphite sticky pad that goes on the brake pad metal plate - they're high frequency vibration dampers between the brake pad plate and the caliper fork & piston..

 

[HurstGN]

No idea where they were made since I didn't keep the boxes. Didn't think I'd need them after the initial install went fine.
The pads were bedded in when initially installed. I had thought about doing it again to see if it made any difference...just got to get to an open road, maybe this weekend.
I have thought about using the old blue disc brake quiet on them to see if it helps at all. They had shims on the back of the plates. I wonder if the shims might be making the noise. I have to see what I can do, maybe this weekend, if spring ever gets here.

 

[Mrjb9475]

I also have the brakemotive pads and rotors and am having the same issue i think its the brake pads i had them for almost 1 year now.

 

[AAIIIC]

Couldn't hurt to try the disk brake quiet lube on the backs of the pads to see if that takes the noise away. With that said, new ceramic pads can be had for under $50 from well-known brands (ACDelco, Raybestos, Centric, Akebono) - might be worth just swapping out the pads. Scuff the rotors with a Scotchbrite disk and bed in the new pads.

 

[remmyman]

If it were me I would change out the front pads with a different brand and go from there. Cheap and easy and you've eliminated one possible problem. More than likely the problem.

 

[HurstGN]

Weekend Update: Jane you ignorant ... Oh, wrong update, and the older folks will know what that was.

OK, so I had the disc brake quiet on hand, so $0 in trying it to see if it works. This weekend I pulled the wheels and cleaned the pads and applied the blue goop to the backs of the pads. It may have initially quieted it a bit, but once I went down the hill today, it's obviously back at the same intensity as before. So next up is to shop for some new pads and see if that fixes it.

I did note when looking at Rock Auto, they have a mix of 1331 and 1332 pads listed for the JE5 brakes. So all is not lost. I see I have the 1332 pads...so I'll get the right pads then I order some. And the saga continues....

 

[00 ss]

Aren't the stock JE5 pads ceramic? I know the J55 are semi metalic, but I thought the smaller brakes were cermaic. If they are, why not just go back to stock?

 

[HurstGN]

When I bought these, they came as a set, 4 rotors and 8 pads, it was convenient. I was just trying to get the peace of mind that I don't have another issue, other than something goofy with these pads. I will get new pads, I just need to find time to get them and get them on the car. Free time is not easy for me.