Kale

My car has a LOT of road noise. That's a funny thing - because I doubt any c5 has nearly the extensive sound deadening mine has...

I took the wheels off and the brakes out. The sound is a lot louder when spinning the wheel than it sounds like.
E-brake is off, I jiggled it too to make sure.

The other side has a slight, consistent noise. The scraping noise comes mainly from the passenger side.

Do I have a bad bearing?

Cutlassmaster

Have you checked to make sure it's not the backing plate rubbing on the rotor? Kind of sounds like that to me.
Chris

tentuna

Is there any play in the bearing, put the tire/wheel back on and grab the wheel in both the horizontal and vertical axis and look for any play there should be none.

Kale

No contact is being made on the rotor that I can see. I can pull the rotor in any case and check again.


And there is no play at all, either. But I've heard that cartridge bearings can take a dump, and still not have any play.

leadfoot4

That, and/or maybe the e-brake shoe rubbing on the inside of the rotor?

And, I'd try loosely installing a couple of lug nuts in place, to keep the rotor turning "true", before trying to diagnose the noise.

Kale

Lug nuts were on.

Would a dragging ebrake cause loud road noise? (rumbling sound)

martysauto

If you have the car secure on stands, wheels off. Install lug nuts snug on rear wheels. Start the car. Turn off traction control and have someone run it up to 20-45 mph. You should hear the bad bearing easily. Be careful! We diagnos bad bearings on lifts all the time. They stand out like a sore thumb.
You could pull the rotors 1st to rule out backing plates and e brake.

leadfoot4

I took a second look at the video, and noticed something. It appears that there are a couple of "scuff marks" on the OD of the rotor. When you switched the camera to a top view, looking down, it looked like the noise was occurring as the rotor passed through the caliper bracket area....

leadfoot4

I don't know if it's a good idea, running the rear CV joint at that kind of angle....

Kale

I don't have a super secure way to lift the rear anyway.

Oh, I forgot to mention -
The road noise is much, much, much louder when I have a passenger.


I do see what looks like two gashes/scuffs/somethign in the rotor in that video, hmmm.

warlock007

at a loss but have you checked the rear spring along with all mounts, bushings etc. If its louder with someone in the car seems like something is broke allowing a shift in stance of the car. Try putting car on ground and put passenger in car and see what happens with lean/sag. try looking under car to see if you can see if anything is visually broke with the weight on the suspension.