Rear Bearing The Source of Scraping Noise While Braking?? - Toyota Nation Forum : Toyota Car and Truck Forums

shackelton · 09-20-2007, 04:53 PM

It's been a while since I last posted and I've sold one of my Camrys, a '92 that I really miss! Anyway, I still have a 2000 that requires more attention as it ages....I did a brake job including new rotors and drums (NAPA parts) and now have a scraping noise coming from the right rear wheel while braking. I noticed some leakage from the right rear bearing, and lacking a dial indicator to measure runout, I am wondering if the bearing is the cause..the car is a 4 cyl auto with ABS...I see a full axle assembly runs around $200. I also lack a hydraulic press which would prevent just replacing the bearing.....thanks much.

***toyomoho*** · 09-20-2007, 05:24 PM

Did the noise start after the brake change, if so re-inspect the installation? Raise the rear tire off the ground and grab the tire at 3 and 9 o’clock. Do a push/pull action to check for bearing play. Have never seen just the bearing offered alone at parts sites.

If you do need a new bearing/hub try online web sources such as www.rockauto.com that are a little cheaper.

shackelton · 09-20-2007, 06:08 PM

Yeah, the scraping noise started after the brake job. I have pulled the rear wheels off and inspected/disassembled/reassembled the rear brakes twice! There seems to be a fair amount of play when I grab and shake the wheel, also a little bit of wobble when I spin the wheel by hand.

I also should add that there was a milder "whirring" noise from the rear wheels prior to the brake job. I attributed that to tire noise because it seemed to have started when I last rotated the tires.

The reason I'm thinking it's the bearing is that if there was significant run-out, wouldn't the wobble have worn the brake shoes (which I have already pitched (oops) with a curved or crowned surface, whereas the brand new shoes, being square would hit the drum unevenly and make an intermittment noise?

I need to find a dial indicator......

xtremeskier97 · 09-20-2007, 06:19 PM

On my 92 accord, which had rear drums, I started having scraping noises. Pulled it apart and it turned out to be a little rivet type thing that is supposed to be on the shoes that sticks out for a spring or something to catch on. It had broken off and fallen into the bottom of the drum where the drum and the backing plate met. When I took the drum off..this little peice was stuck on the bottom of the backing plate....had to get down low to see it.

Not sure if this helps....just sharing my experience.

shackelton · 09-20-2007, 08:44 PM

yeah, one of the times I had the brakes apart today (!!) I closely examined the shoes and drums for any defects, protruding metal, etc. I also dropped the shoes in the the drums and they fit nice and tight. The backing plates are in good shape and I used high temp lube on the indicated areas. Also disassembled and cleaned the adjusters and e-brake brackets. I have a Toyota factory manual and have compared my reassembled brakes with the schematics several times. I can't see anything dumb that I might have done.....

shackelton · 10-05-2007, 02:33 PM

I am still unable to get rid of this noise!! Since my last post I have checked the runout on the back axles (less than .003), bought new shoes and parts kit, and swapped the drums from one side to the other. I have also tried setting the adjusters all the way in, which results in zero emergency brake even with the cable travel all the way to the limit. I then set the adjusters out to where the drums will just clear the shoes. I have looked and looked at my assembly work compared to schematics, pictures, and can't see anything obviously wrong. I even confirmed the adjusters are on the correct sides (left vs. righthand threads) even though I only took one side apart at a time. This shouldn't be this hard! Someone please helP!

Stillrunning · 10-05-2007, 03:47 PM

Could the rubbing be the drum against the backing plate?

1996camry · 10-05-2007, 09:50 PM

it happen to me the same way after i changed the brake. the sound heard from front right passenger wheel. it turn out wheel bearing went bad. replaced it, and now NO more noise. if you know for sure, u can do a test slow drive...like back up or go forward with condition with some run along with the car to hear the noise for sure the come from the the wheel. first, i thought the tire that cause, i did rotate the tires and no changed....then i thought the brake that cause the noise..but it's really turn out the wheel bearing...if the wheel bearing is not really bad, you hear a clicking clicking (small pitch noise)...it's wheel bearing.. if you weren't sure, get a machanice for second thoughts...but my turn out the wheel bearing..and i replaced with a new one..NOW, NO MORE NOISE ON THE FRONT RIGHT WHEEL>>..

shackelton · 10-06-2007, 08:16 AM

Thanks for the replies. There appears to be adequate and consistent clearance between the brake drums and backing plates. Short of taking the backing plates off and checking them with a straightedge, they look to be straight. Also, I checked for excessive run-out with a dial indicator off of the axle hub. It was within spec. Does that mean the bearing isn't the cause, that is if it is within spec while turning it by hand, will it still be in spec while being subjected to vehicle weight, rolling & braking forces?

Any insight into where the adjusters should be set when reassembled? Other that cleaning and lubricating them, I can't find any specifics as to where they should be set before reinstalling. Do I crank them all the way in or try to adjust them out?

Thanks.