| Author |
Message |
Ralph
Guest
|
 Posted:
Tue Nov 22, 2005 2:18 am Post subject:
93 Corolla rear wheel noise |
|
|
Jack requests...
Your expert suggestions invited:
This 93 Corolla at 265,000 km makes resonant noise from the left rear wheel.
Any suggestions on how to diagnose the cause?
Thanks for your help, Jack.
|
|
| Back to top |
|
 |
njmodi
Guest
|
| Posted:
Tue Nov 22, 2005 2:32 am Post subject:
Re: 93 Corolla rear wheel noise |
|
|
Try *lightly* engaging the parking brake (while moving) and see if that
changes anything... you might have dragging brakes.... |
|
| Back to top |
|
|
Ray O
Guest
|
| Posted:
Tue Nov 22, 2005 4:11 am Post subject:
Re: 93 Corolla rear wheel noise |
|
|
"Ralph" <nospam@thanks.com> wrote in message
news:43822b7f$1_2@news.cybersurf.net...
| Quote: | Jack requests...
Your expert suggestions invited:
This 93 Corolla at 265,000 km makes resonant noise from the left rear
wheel.
Any suggestions on how to diagnose the cause?
Thanks for your help, Jack.
Possible causes of noise from the rear of a front-wheel drive vehicle: |
Brakes dragging or worn; bad wheel bearing; bad tire; bad wheel cover.
--
Ray O
correct the return address punctuation to reply
|
|
| Back to top |
|
|
Ralph
Guest
|
| Posted:
Tue Nov 22, 2005 9:19 am Post subject:
Re: 93 Corolla rear wheel noise |
|
|
Jack ponders:
Thanks for the replies.
It could be a bad tire. I'll try rotating the tire and see if the noise
relocates too. What would make a tire go 'wup-wup-wup'? A broken belt?
These are Wal-Mart specials, and although warranted 100,000 km I anticipate
trouble getting an adjustment if the treadwear looks unusual.
It's probably not the brakes.
How do I check for a wheel bearing?
Regards from Jack.
("We are simple people and easily confused by the slightest complexity. -
Jack Vance) |
|
| Back to top |
|
|
Ray O
Guest
|
| Posted:
Tue Nov 22, 2005 10:31 pm Post subject:
Re: 93 Corolla rear wheel noise |
|
|
"Ralph" <nospam@thanks.com> wrote in message
news:438290a7_1@news.cybersurf.net...
| Quote: | Jack ponders:
Thanks for the replies.
It could be a bad tire. I'll try rotating the tire and see if the noise
relocates too. What would make a tire go 'wup-wup-wup'? A broken belt?
These are Wal-Mart specials, and although warranted 100,000 km I
anticipate trouble getting an adjustment if the treadwear looks unusual.
|
The noise you're describing is generally caused by a broken belt.
| Quote: |
It's probably not the brakes.
How do I check for a wheel bearing?
Regards from Jack.
Check for excessive play and visually inspect the bearing for discoloration. |
--
Ray O
correct the return address punctuation to reply |
|
| Back to top |
|
|
Ralph
Guest
|
| Posted:
Sat Nov 26, 2005 11:51 pm Post subject:
Re: 93 Corolla rear wheel noise |
|
|
1993 Corola LX at 265 000 km - Left rear wheel
Thanks for your helpful ideas. The stuck wheel came off with a few days'
penetrating oil on the hub and a short trip with loosened wheel nuts.
My questions are, what is the cause of tire cupping, and is the wheel
bearing ok.
The tire is badly cupped - looks like it was shaved with an axe! Would this
be caused by the very old, off-balance brake drum? The drum had big hunks
of metal flaking from the outside. The distribution of missing metal was
uneven. You can chip lose rust off with a hammer. This drum is probably
original and is worn almost to max. specs. (ID 201 mm). The shock is
working properly - I put gas shocks on in 2003. On casual inspection,
various suspension parts nearby don't seem to be missing or damaged.
The wheel spins freely without noise or play. If spun with the tire and rim
on, it keeps rolling for a dozen turns or so. The hub alone (drum removed)
spins freely, but is stopped in a few turns by friction. Is this
acceptable? Should I remove the hub to look at the bearing, and perhaps put
a bit of grease on it for old times sake?
Will a cupped tire wear smoother e.g. through rotation? Or does the cupping
remain forever?
Thanks,
Jack |
|
| Back to top |
|
|
Ray O
Guest
|
| Posted:
Sun Nov 27, 2005 12:46 am Post subject:
Re: 93 Corolla rear wheel noise |
|
|
"Ralph" <nospam@thanks.com> wrote in message
news:4388a0b9$1_1@news.cybersurf.net...
| Quote: | 1993 Corola LX at 265 000 km - Left rear wheel
Thanks for your helpful ideas. The stuck wheel came off with a few days'
penetrating oil on the hub and a short trip with loosened wheel nuts.
My questions are, what is the cause of tire cupping, and is the wheel
bearing ok.
The tire is badly cupped - looks like it was shaved with an axe! Would
this be caused by the very old, off-balance brake drum? The drum had big
hunks of metal flaking from the outside. The distribution of missing
metal was uneven. You can chip lose rust off with a hammer. This drum is
probably original and is worn almost to max. specs. (ID 201 mm). The
shock is working properly - I put gas shocks on in 2003. On casual
inspection, various suspension parts nearby don't seem to be missing or
damaged.
|
Cupping or scalloping refers to a scalloped edge, which can be cause by bad
or worn shocks/struts, improper wheel mounting, loose lug nuts, bad wheel
bearings.
If one outside edge is smoothly worn more than the rest of the tread, then
that is a sign of improper camber.
If one side is feathered, then that is a sign of improper toe.
If both outside edges of the tread are worn, that is a sign of low tire
pressure.
If the inside of the tread is worn more than the outside, that is a sign of
excessive tire pressure.
| Quote: |
The wheel spins freely without noise or play. If spun with the tire and
rim on, it keeps rolling for a dozen turns or so. The hub alone (drum
removed) spins freely, but is stopped in a few turns by friction. Is this
acceptable? Should I remove the hub to look at the bearing, and perhaps
put a bit of grease on it for old times sake?
Will a cupped tire wear smoother e.g. through rotation? Or does the
cupping remain forever?
Thanks,
Jack
|
The wheel on a vehicle with drum brakes should not spin freely. When raised
off the ground, it should spin once or twice and stop if the rear brakes are
properly adjusted. Improperly adjusted rear brakes will cause more rapid
front brake wear and longer stopping distances.
If you are getting a growling noise from the rear, that could be from the
brakes or from the wheel bearing. If you are going to go through the
trouble of removing the wheel bearing, you might as well re-pack it
properly, not just apply grease on the outside. To re-pack it properly, you
should remove all the old grease with a solvent, dry thoroughly (do not spin
the bearings with compressed air!) and re-pack with a good quality
high-temperature wheel bearing grease (not lithium grease). There are
devices to speed up the re-packing process and some even force out the old
grease while replacing it with new grease. If you have a wheel bearing
packer, then the process goes a lot faster.
--
Ray O
correct the return address punctuation to reply |
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in