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Before rear shoe replacement:
Brakes would make a grinding noise when applied only backing up.After shoe replacement:
Shoes make grinding noise only when applied when stopping from a slow speed.What was done:
Replaced shoes.
Drums looked great. Passed the razor blade test (I drag the corner of a blades across the drum to feel for groves and whatnot)
No glazing.I did take emery cloth to rough them up.
I tested the parking/emergency brake and it stops the car. Applying that also makes a grinding sound.
I double checked the assembly with the Honda service manual and it looks perfect – if I say so myself.
After a couple of hundred of miles, I took the drums off to see what is causing the noise and I saw nothing.
BUT there’s obviously something wrong and I’d like some feedback before I take the wheels off again to see if I can see where they may be scraping.
Thanks!
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And you’re sure it’s not the front brakes? Maybe the side of the brake shoes is rubbing the inside of the drum. Maybe bad bearings.
I’m positive it’s not the front. A few of us listened and it’s definite that it’s coming from the back on both sides.
Brake shoes rubbing inside of the drum? That’s a possibility and that’ll be something I look for when I remove them again. But when I turn the wheels by hand without the brakes engaged, there isn’t any sound at all. I can’t remember if the insides of the drum are tapered. Meaning, as the brakes are applied, there is less clearance.
FYI: these are NAPA Tru Stop shoes.
Rubbing on the sides was kind of a long shot. You could try using a grease marker on the sides of the pads, see if it transfers to any other surfaces. Maybe try repacking the rear bearings.
OK. I got those lying around.
It’s been a few hundred miles now, so if they are rubbing on the sides or anywhere else, I’m hoping I’ll some obvious wear somewhere.
Did you have the drums machined before installing the new shoes? Id also be checking for a rust ridge on the inside of the drum.
What type of lube dud you using on the shoe anchor points?
No, I didn’t have them machined. They looked great – no glazing or ridges – so I just scuffed them up with emery cloth.
As far as lube on the mount points, I used high temperature grease for drum brakes. I can’t remember the exact brand.
Rust ridge? Exactly where? On the surface where the shoes make contact with the drum or somewhere else?
More on the saga of the drums …..
Apparently, I don’t know what “glazed” means. To me,”glazed” means a glass finish.
I took the drums to be machined and for one, they were glazed and had heat spots on them. Secondly, the were maxed out – the lathe operator wouldn’t touch them.
Bought new drums.
The grinding/scraping noise is gone BUT you can still hear the brakes being applied at low speed – less than 10mph.
I’m wondering if that’ll go away as the shoes wear into the new drums.
Any time we service any part of the brake system at work, we always measure the rotors/drums as we are able to machine them if there within specs.
Did you use new brake hardware?
The below video’s may help –
Yeah, I got new hardware.
I ripped them apart again this morning. I took some sandpaper to the shoes because there was a little glazing from the old drums.
Cleaned them up and reassembled.Most of the scary sounds are gone now – for whatever reason.
But when applying (pedal or parking brake), you really hear the shoes on the drums.
You know that sound you hear when the adjustor is just a little too far out when you spin the drum? The sound of the drum against the shoe? Imagine that only a lot louder.
I hate to just chalk it up to the shoes being noisy. With the old shoes, it made that sound only when stopping when backing up.
The most common cause of brake noise is the friction material itself. The mantra seems to be the cheeper the parts the more the noise. In short if you didn’t use quality shoes this is the most likely cause of the noise. You might test this by sanding the surface of the shoes and then rechecking for the noise. If the noise has changed or goes away I would say it’s your shoes that are making the noise. The only way to fix it would be to replace the shoes with a better brand if that’s the case.
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