Squealing noise....
Thread Starter
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Squealing noise....
This one is a bit strange; To put the sound into context, I initially thought it was a bearing going out in the accessory drive; an idler bearing for example. So the "squealing" sounds like that might sound.
It's not that though; it does it w/the engine shut off (car moving). Conditions;
*Car has to be hot, or has been driven -doesn't do it cold.
*Any speed above ~14 mph. Noise "shuts off" abruptly below ~14 mph. Noise is overshadowed by wind road noise above 25-30 mph, so most noticeable between ~14 and 20 mph.
*Doesn't change in anyway, w/brake application/release. Pads/rotors new, anyway...although it made the noise before changing them. IOW, not brake related, IMO.\
*As stated above, does it when rolling down the road, engine off, so not engine/clutch/trans related.
I think I'm going to have to get it hot, then hurry up and jack stand it, then have someone "drive it" above 14 mph while I climb under it and look/listen. Super annoying, "junker" sounding, rolling through my neighborhood. Yuck.
It's not that though; it does it w/the engine shut off (car moving). Conditions;
*Car has to be hot, or has been driven -doesn't do it cold.
*Any speed above ~14 mph. Noise "shuts off" abruptly below ~14 mph. Noise is overshadowed by wind road noise above 25-30 mph, so most noticeable between ~14 and 20 mph.
*Doesn't change in anyway, w/brake application/release. Pads/rotors new, anyway...although it made the noise before changing them. IOW, not brake related, IMO.\
*As stated above, does it when rolling down the road, engine off, so not engine/clutch/trans related.
I think I'm going to have to get it hot, then hurry up and jack stand it, then have someone "drive it" above 14 mph while I climb under it and look/listen. Super annoying, "junker" sounding, rolling through my neighborhood. Yuck.
Oil Producer
Joined: Apr 2014
Posts: 9,380
Likes: 2,744
This one is a bit strange; To put the sound into context, I initially thought it was a bearing going out in the accessory drive; an idler bearing for example. So the "squealing" sounds like that might sound.
It's not that though; it does it w/the engine shut off (car moving). Conditions;
*Car has to be hot, or has been driven -doesn't do it cold.
*Any speed above ~14 mph. Noise "shuts off" abruptly below ~14 mph. Noise is overshadowed by wind road noise above 25-30 mph, so most noticeable between ~14 and 20 mph.
*Doesn't change in anyway, w/brake application/release. Pads/rotors new, anyway...although it made the noise before changing them. IOW, not brake related, IMO.\
*As stated above, does it when rolling down the road, engine off, so not engine/clutch/trans related.
I think I'm going to have to get it hot, then hurry up and jack stand it, then have someone "drive it" above 14 mph while I climb under it and look/listen. Super annoying, "junker" sounding, rolling through my neighborhood. Yuck.
It's not that though; it does it w/the engine shut off (car moving). Conditions;
*Car has to be hot, or has been driven -doesn't do it cold.
*Any speed above ~14 mph. Noise "shuts off" abruptly below ~14 mph. Noise is overshadowed by wind road noise above 25-30 mph, so most noticeable between ~14 and 20 mph.
*Doesn't change in anyway, w/brake application/release. Pads/rotors new, anyway...although it made the noise before changing them. IOW, not brake related, IMO.\
*As stated above, does it when rolling down the road, engine off, so not engine/clutch/trans related.
I think I'm going to have to get it hot, then hurry up and jack stand it, then have someone "drive it" above 14 mph while I climb under it and look/listen. Super annoying, "junker" sounding, rolling through my neighborhood. Yuck.
yeah that would be annoying.
while hearing the noise, rolling with engine of, (if i understand your description correctly) if you turn the wheel side to side does it affect the noise? your description doesn't match a wheel bearing perfectly but if the noise changed with steering wheel turning that might be good to know.
Oil Producer
Joined: Apr 2014
Posts: 9,380
Likes: 2,744
Burning Brakes
Joined: Jun 2014
Posts: 1,020
Likes: 51
From: Connecticut
Can't remember if the cooling fans are independent of the key switch or not. Either way it is a long shot guess as I can't think of any rotating mechanical part that would act in the manner that is being described that hasn't already been ruled out. This is a head scratcher.
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
With the engine shut off there is not a whole lot that is moving.
Wheel bearings and u joints are my first thoughts and I have heard u joints make strange intermittent noises. But I don't know why they would turn the noise on and off at about 14 mph.
Good luck and keep us posted what you find.
Wheel bearings and u joints are my first thoughts and I have heard u joints make strange intermittent noises. But I don't know why they would turn the noise on and off at about 14 mph.
Good luck and keep us posted what you find.
Thread Starter
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Wheel bearings are 2 years old SKF. U-joints are 2 year old, Spicer.
Last edited by Tom400CFI; Sep 28, 2016 at 03:31 PM.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 413
From: WV
Tom,
I had a driveshaft universal joint that made a squealing noise because it was frozen up...The way I found it ,was on a lift..When I removed the driveshaft the joint was frozen solid..You said your u-joints are 2 years old, but you didn't say if you replaced the ones in the driveshaft or just the axles ....WW
.
.
I had a driveshaft universal joint that made a squealing noise because it was frozen up...The way I found it ,was on a lift..When I removed the driveshaft the joint was frozen solid..You said your u-joints are 2 years old, but you didn't say if you replaced the ones in the driveshaft or just the axles ....WW
.
.
Last edited by WW7; Sep 29, 2016 at 11:38 AM.
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Thread Starter
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Tom,
I had a driveshaft universal joint that made a squealing noise because it was frozen up...The way I found it ,was on a lift..When I removed the driveshaft the joint was frozen solid..You said your u-joints are 2 years old, but you didn't say if you replaced the ones in the driveshaft or just the axles ....WW
.
.
I had a driveshaft universal joint that made a squealing noise because it was frozen up...The way I found it ,was on a lift..When I removed the driveshaft the joint was frozen solid..You said your u-joints are 2 years old, but you didn't say if you replaced the ones in the driveshaft or just the axles ....WW
.
.
I probably won't get to it until next week. Need to replace the radiator in our CTS-V tonight...then headed to Lake Powell for the weekend. I'll look at everything suggested of course, and post what, if anything, I find.
Thread Starter
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Noise is unchanged with brake application and release. Also, just changed the pads and rotors. Noise is unchanged from before the brake change and after.
WVZR-1 is right on the money, as always!
Water was wet, sun was out, temps in the mid 80's, water was flat and calm and oh, so ripable....oh yes it was nice. I didn't think about my 'Vette at all. Got back at 10 PM last night, it's 34* outside and supposed to snow today through Wednesday, so it will be a couple more days until I am willing to drive it and get it hot/noisy. Sorry for the delay.
Water was wet, sun was out, temps in the mid 80's, water was flat and calm and oh, so ripable....oh yes it was nice. I didn't think about my 'Vette at all. Got back at 10 PM last night, it's 34* outside and supposed to snow today through Wednesday, so it will be a couple more days until I am willing to drive it and get it hot/noisy. Sorry for the delay.
Thread Starter
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
One thing I love about UT; you can have anything you want, almost all the time.
Yesterday, Lake Powell;
This morning, pulling into work in Little Cottonwood Canyon...
Why are my pictures sideways?? Grrrr....
Yesterday, Lake Powell;
This morning, pulling into work in Little Cottonwood Canyon...
Why are my pictures sideways?? Grrrr....
Last edited by Tom400CFI; Oct 3, 2016 at 11:46 AM.
