Please help with this noise
Thread Starter
Intermediate
Joined: Sep 2011
Posts: 44
Likes: 29
From: Anna, Texas
Please help with this noise
I have a 2007 Corvette with 45k miles. There is a squeaking noise under the hood. It's been hit and miss but I've heard it for a couple of days now so I really need to identify it. I do have some technical skills( do my own maintenance and auto repair) so hopefully it's something I can fix.
I've attached a youtube link so you can hear.
https://www.youtube.com/watch?v=HfqA...ature=youtu.be
Thanks for your help!
I've attached a youtube link so you can hear.
https://www.youtube.com/watch?v=HfqA...ature=youtu.be
Thanks for your help!
Thread Starter
Intermediate
Joined: Sep 2011
Posts: 44
Likes: 29
From: Anna, Texas
Got home and did a better inspection with a brighter light. The squeaking had stopped when I pulled in the garage but it has been squeaking all day. I thought I didn't have the harmonic wobble but it appears I was wrong. See attached video, I'm pretty sure it's the harmonic.
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Heel & Toe
Joined: Oct 2018
Posts: 16
Likes: 3
From: North Carolina
Did the noise start after you washed the engine by chance? We've only had our 2007 vert for a week, but after washing the engine bay real good I noticed a squeak from the engine that seemed to increase with acceleration.
Thread Starter
Intermediate
Joined: Sep 2011
Posts: 44
Likes: 29
From: Anna, Texas
I have not washed the engine bay. It's been raining here a lot but no deep water driving either. 
I thought about the bearing but the chirp seems further down..
I'm thinking it might be belt related and I'm just reading too much into it.
I thought about the bearing but the chirp seems further down..
I'm thinking it might be belt related and I'm just reading too much into it.
Retired & lovin' it!
Joined: Mar 2005
Posts: 4,474
Likes: 547
From: Jackson NJ
You & everyone else are just guessing. Get yourself a mechanics stethoscope (they're cheap at any auto parts store) or a 2-ft section of garden hose & listen carefully at each rotating component. You will quickly know where the noise is coming from.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Better video would help, but banking either a dry bearing in one of the two tensioner pulley's, the idler pulley, or the the A/C compressor clutch bearing going south instead.
Turn the A/C so the compressor clutch engages (instead of free wheeling instead), and if the noise goes away, it's the A/C compressor clutch will need to be replaced.
Turn the A/C so the compressor clutch engages (instead of free wheeling instead), and if the noise goes away, it's the A/C compressor clutch will need to be replaced.
Drifting
Joined: Oct 2013
Posts: 1,495
Likes: 154
From: Somewhere Near Bakersfield California
that's funny because my car never did this noise... but I just changed my radiator and some coolant leaked out onto the belts and pulleys because a hose wasn't fully clamped (the one from the upper water pump to top of radiator on thr drivers side). Well while after driving the car I noticed my car was doing the same exact noise especially when I use gas. Idk if it's because I got the belts and pulleys a little wet or not, but in a few days or tomorrow if the noise stops I'll let you all know
Last edited by Jaime-Corvette; Oct 13, 2018 at 11:39 PM.
Drifting
Joined: Oct 2013
Posts: 1,495
Likes: 154
From: Somewhere Near Bakersfield California
Le Mans Master
Joined: Jan 2008
Posts: 6,457
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From: corpus christi Texas
Thread Starter
Intermediate
Joined: Sep 2011
Posts: 44
Likes: 29
From: Anna, Texas
Just an update to the noise. First off, I will get a mechanics stethoscope so I can do some detailed listening.
An old shade tree mechanic told me to get a bar of soap and rub it on the underside of the belt.I did that Friday night and the noise stopped immediately. I didn't drive much over the weekend so today will be the real test. I don't know if its's belt related or if that was just a quick way to silence the noise.
I will post a follow up to let ya'll know if the noise comes back or what's going on. Thanks for all the input and help on this.
An old shade tree mechanic told me to get a bar of soap and rub it on the underside of the belt.I did that Friday night and the noise stopped immediately. I didn't drive much over the weekend so today will be the real test. I don't know if its's belt related or if that was just a quick way to silence the noise.
I will post a follow up to let ya'll know if the noise comes back or what's going on. Thanks for all the input and help on this.
Drifting
Joined: Oct 2013
Posts: 1,495
Likes: 154
From: Somewhere Near Bakersfield California
If the bar of soap stopped the belt from making that noise immediately that could be because the belt is bad. I would start by buying a new belt. If it starts making the noise again, get a tube of hose and listen where the noise is coming from... it could be a pulley or bearing. If the noise comes from the crankshaft pulley (harmonic balancer) then that would be a heck of a replacement