Strange new rumble/grumbling noise
Thread Starter
Racer
Joined: Jul 2001
Posts: 265
Likes: 0
From: Levelland, TX USA
Strange new rumble/grumbling noise
Last week, bought new Michelin Pilot Sports ZP, drove it home and had a four wheel alignment done the next day. Today i got it out on the highway and i hear a new noise at 70-75mph. It oscillates or cycles at about one per second. Doesn't change if i change from accelerate to decelerate, or put in neutral. It just goes rmmm, rmmm, rmmm, rmmm, very rythmically. I can even feel it in the car. I pressed my elbow into the steering wheel and put my ear in my palm, and i could hear it very clearly.
So i'm thinking, could it be the new tires? Could it be the alignment? Wheel bearing? Maybe a bearing is doing it and i just couldn't hear it with the noisy Goodyears? I don't know where to begin. Any suggestions?
So i'm thinking, could it be the new tires? Could it be the alignment? Wheel bearing? Maybe a bearing is doing it and i just couldn't hear it with the noisy Goodyears? I don't know where to begin. Any suggestions?
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Re: Strange new rumble/grumbling noise (Darrell G)
Last week, bought new Michelin Pilot Sports ZP, drove it home and had a four wheel alignment done the next day. Today i got it out on the highway and i hear a new noise at 70-75mph. It oscillates or cycles at about one per second. Doesn't change if i change from accelerate to decelerate, or put in neutral. It just goes rmmm, rmmm, rmmm, rmmm, very rythmically. I can even feel it in the car. I pressed my elbow into the steering wheel and put my ear in my palm, and i could hear it very clearly.
So i'm thinking, could it be the new tires? Could it be the alignment? Wheel bearing? Maybe a bearing is doing it and i just couldn't hear it with the noisy Goodyears? I don't know where to begin. Any suggestions?
So i'm thinking, could it be the new tires? Could it be the alignment? Wheel bearing? Maybe a bearing is doing it and i just couldn't hear it with the noisy Goodyears? I don't know where to begin. Any suggestions?
A bad bearing will change pitch and intensity when you switch back and forth between lanes. (Change side loading) If that isn't the case be suspicious of bad balancing (are the weights on the lip of the rim or inside?) also it might be an out of round tire.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,821
From: Charlotte, NC (formerly Endicott, NY)
Re: Strange new rumble/grumbling noise (TexasRedZ06)
It could be a wheel bearing. Two years ago I went w Firestone Run Flats and thought the growling noise I was hearing was from the tires. Turned out I had to get 4 bearings replaced to get rid of the noise.
Bill
Bill
Race Director
Joined: Aug 2001
Posts: 17,901
Likes: 18
From: Elko, Nevada
Re: Strange new rumble/grumbling noise (Darrell G)
Remember the most definitive test on wheels out of alignment is the car
pulling to one side. Most other vibrations or unsteadiness is the result of
the wheel becomming un-balanced.
Do you have wheel weights on the outer(visible) side of the rim, or on the
inside? Or do have the 'static' balance where the weights are glued to the
inner part of the rim? Maybe a weight fell off...?
:cheers:
pulling to one side. Most other vibrations or unsteadiness is the result of
the wheel becomming un-balanced.
Do you have wheel weights on the outer(visible) side of the rim, or on the
inside? Or do have the 'static' balance where the weights are glued to the
inner part of the rim? Maybe a weight fell off...?
:cheers:
