Brakes

[DrummerDude70]

Hello, all! Ok, so my '02 Z71 has an odd brake grinding noise coming from the front left inboard pad. I removed the wheel and rotor only to discover nothing... no shavings or filings of any kind. I roughed up the I/B pad (you could easily hear the grinding just by turning the axle) and the noise stopped for a couple of days. I had already bought replacement rotors and pads, just in case. When the grinding noise returned, I just replaced everything. Now the damn noise has come back. Any ideas or thoughts? Everything looks completely normal, but this is really getting under my skin. Any advice would be appreciated. TIA!

 

[lyncht1967]

sur it's brake related and not a bad hub bearing?

 

[Fless]

Or a brake backing plate / splash that the rotor is hitting?

 

[89Suburban]

Are the brake pads worn evenly? As stated above could be the hub bearing going out. Pop the rotor off and look at the grease seal on the hub bearing. Outer and inner. It may look wet if the baring is going away. 2WD or 4WD?

 

[nonickatall]

If you could hear the noise simply by turning the wheel, remove the caliper and turn the wheel. If the noise is gone, there is some issue with you brakes, if not, it's possibly the wheel bearing.

By the the way. Did you push back the pistons in the calipper a few times, to make them free moving again? Also, did you check and grease the slide pins?

 

[Joseph Garcia]

Are the pins on the caliper well lubed?

 

[rockola1971]

Caliper could be hanging up, like others said the hub assembly is shot and even the metal dust guard bent inward.

 

[DrummerDude70]

sorry for the delay, guys. When the caliper is removed, no noise. The bearings have been replaced. If it were a bearing, it would (likely) make noise all the time, plus there is no slack or unusual movement with the wheel/tire/rotor. That's one reason I brought up the pad scuffing and replacement. I pushed the pistons back to make sure they were free and clear and moving as it should. I didn't see any evidence of grease leaking and slide pins looked fine. As I mentioned, I see no evidence of any shavings or filings. This one is odd and has me a bit stumped. It doesn't really seem to effect the braking too much, mostly just super annoying.

 

[DrummerDude70]

@89Suburban : 4wd (Z71).

 

[afpj]

How are your flexible lines? Heard stories of internal collapse which causes pistons to not retract at times.

 

[nonickatall]

How are your flexible lines? Heard stories of internal collapse which causes pistons to not retract at times.

That leads into permanent braking and likely to hot rotors, but not to noise ..

It is strange, that you have that noise when you changed pads and rotors and the noise commes back.

What is, if you push the pads with a big screwdriver back, so that they not touch the rotors. What is then with the noise?

 

[DrummerDude70]

@afpj : I replaced them a few years back, so they are in great shape. @

 

[DrummerDude70]

@nonickatall : Pushed back, no noise.

 

[nonickatall]

@nonickatall : Pushed back, no noise.

What brand do you use as pads and rotors? Do you control the pads? Is the surface clean? Can you take a picture of the rotor and pad surface and post it?

And by the way. Do you play drums? Your nick sounds like it.

 

[DrummerDude70]

@nonickatall : When the issue started, I had some performance type rotors from 1A (slotted and drilled). I replaced the pads last year, as this is our travel vehicle, and replaced with whichever top pads that NAPA sells. I replaced this time using all NAPA, again whichever their top line pads/rotors are. The rotor surfaces look fine. I will post a pic as soon as I can.

BTW, I do play drums! I've been playing drums for about 40 years. I also play guitar, bass, piano and keys, am a sound and recording engineer, too.

 

[nonickatall]

@DrummerDude70 Propably your pad rotor combination is the problem.... But thats only an idea.

Btw, i play the drums too. I would not call me a drummer but i love musik and i love to play.

Thats me on the drums. I recorded myself on my roland TD 30 kv in one take...

 

[SilverSport]

nice job...great song...love Pink Floyd

Bill