New rattle noise at 45 Mph and above... - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Edrock · 07-27-2010, 01:23 PM

Hi All,
Does anybody know what could be causing this noise or have experienced this yourself? First, the noise sounds like a leaf or paper caught in the air intake just outside the windshield where air is drawn into the car. In all my testing, I have eliminated the A/C by completely turning it off and the noise persists. Turned the radio completely off and it still happens. It almost sounds like it is not inside the cabin and in front of me around the center of the dash like just on the other side of the firewall or deep inside the dash somewhere. The first big clue is the fact that I can cruise above 45 Mph and can hear this object flapping in the wind like a leaf that's hanging on for life and won't let go. I can shift into neutral and coast above 45 Mph and hear it strong. As soon as I coast down to 44 Mph, the noise goes away. If I speed up above 45 Mph, here it comes again and loud. It does seem to be speed/wind related because the faster I go the back and forth ticking sound it makes gets faster. When I coast down to 45 Mph, the ticking sound slows down its cadence just before it stops. It's the most annoying sound and can be heard with music on and A/C on...that's how annoying it is and it's steady too. Anybody heard this or has my car developed a unique issue?

superman · 07-27-2010, 01:34 PM

Not to be condescending, but maybe a leaf or a piece of paper is caught in the intake or around the intake. You didn't say whether you checked that. Check the whole front bumper. You might only be able to hear it because 45 miles might be the exact speed required for that piece of paper to resonate - kind of like the drone you hear from aftermarket exhausts at certain rpms/speed. If it's a new sound, it's probably something stuck.

Edrock · 07-27-2010, 02:02 PM

Quote:

Originally Posted by superman

Not to be condescending, but maybe a leaf or a piece of paper is caught in the intake or around the intake. You didn't say whether you checked that. Check the whole front bumper. You might only be able to hear it because 45 miles might be the exact speed required for that piece of paper to resonate - kind of like the drone you hear from aftermarket exhausts at certain rpms/speed. If it's a new sound, it's probably something stuck.

LOL, Good point...I failed to say what other things I looked for. I crawled up and around the front end of the car, thoroughly inspected the front grill and air dam on the lower fascia. I also tried to check the intake vents that feed the cabin just under the hood cowl but it was very hard to see in there. In all cases, no obstructions, trash, leaves, etc. I need to see if I can get inside that air intake where the pollen filter is located because it is probably time to change that anyway since I've had the car a year now. Any other suggestions?

EDIT: I also checked for objects rattling in the glove compartment and center console...nothing.

superman · 07-27-2010, 02:32 PM

Maybe that air filter is ripped or has a tear in it? causing air to blow by it and cause that paper flapping sound?

ffrcobra_65 · 07-27-2010, 03:03 PM

look for loose part number labels in the engine bay.

Edrock · 07-27-2010, 03:18 PM

Quote:

Originally Posted by ffrcobra_65

look for loose part number labels in the engine bay.

Hey...that's a good idea. That's what it sounds like. I'll check tonight and post back.

Edrock · 07-28-2010, 07:43 AM

Actually forgot to check for flapping OEM labels in the engine bay last night, BUT, on the interstate this morning, the noise became loud for a second then when to a low level where I could barely hear it. I suspect whatever it was finally tore off leaving a smaller piece behind. When I got to work, I popped the hood and was surprised to find so many OEM labels all over the engine bay so I removed as many as I could reach. When I head out at lunch today, we'll see how it goes from there. Will update then.

jomo45 · 07-28-2010, 10:48 AM

Edrock, I have the exact same noise, been having a heck of a time describing it, thanks for the Leaf analogy!!

I'll look this weekend for a parts tag, that does seem a likely suspect.

Edrock · 07-28-2010, 11:44 AM

Quote:

Originally Posted by jomo45

Edrock, I have the exact same noise, been having a heck of a time describing it, thanks for the Leaf analogy!!

I'll look this weekend for a parts tag, that does seem a likely suspect.

Glad to know I'm not the only one. When I went home for lunch, the sound is still there above 45 Mph (just not as loud) even though I took the OEM tags off this morning that I could reach from the topside of the engine bay. Now I'm wondering if something really is lodged in the air intake vents under the cowl of the hood just below the wiper blades. I need to find some documentation about how to change the pollen filter in that location anyway so hopefully I'll find the smoking gun at that point. Good luck.

Edrock · 07-28-2010, 12:22 PM

This is where I'm headed next in case anybody is interested. Will post results when I get a chance to get in there and check it out.

Here's the thread: http://www.camaro5.com/forums/showthread.php?t=85122

Here are 2 important posts in that thread with clues on how to get in there:

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Hawkeye · 07-29-2010, 09:52 AM

SAME EXACT PROBLEM HERE. It drives me crazy this sound. I've also been unable to describe the sound, thanks for the analogy. I will monitor this thread closely for a fix. I'll pray for one too, as I am the type of person that is highly annoyed by sounds like that. I can hear it over the radio too.

Hylton · 07-29-2010, 09:58 AM

I have the same problem as well and the picture above gives me hope that it indeed comes from the passenger side filter. I am going to the dealership right now and I'll report back folks.....

Hylton · 07-29-2010, 11:39 AM

Just got back. We removed the filter cover and filter and then cleaned everything in site in the box. Put everything back in and so far, so good! Easy job to do at home guys - 3 fasteners and the lid comes off quite easily. You'll notice the weather striping is intentionally cut to allow the lid to be removed.

Hawkeye · 07-29-2010, 11:56 AM

So did you find the debris? Was it a leaf or paper? Or did you not find anything specific and the noise just went away?

07-27-2010, 01:23 PM	#1
Edrock Drives: '10 Camaro 2SS LS3 Join Date: Jan 2009 Location: Jamestown, NC Posts: 964 View My Garage	New rattle noise at 45 Mph and above... Hi All, Does anybody know what could be causing this noise or have experienced this yourself? First, the noise sounds like a leaf or paper caught in the air intake just outside the windshield where air is drawn into the car. In all my testing, I have eliminated the A/C by completely turning it off and the noise persists. Turned the radio completely off and it still happens. It almost sounds like it is not inside the cabin and in front of me around the center of the dash like just on the other side of the firewall or deep inside the dash somewhere. The first big clue is the fact that I can cruise above 45 Mph and can hear this object flapping in the wind like a leaf that's hanging on for life and won't let go. I can shift into neutral and coast above 45 Mph and hear it strong. As soon as I coast down to 44 Mph, the noise goes away. If I speed up above 45 Mph, here it comes again and loud. It does seem to be speed/wind related because the faster I go the back and forth ticking sound it makes gets faster. When I coast down to 45 Mph, the ticking sound slows down its cadence just before it stops. It's the most annoying sound and can be heard with music on and A/C on...that's how annoying it is and it's steady too. Anybody heard this or has my car developed a unique issue? __________________ DT Shorties, Solo hi-flow Cats, X-pipe, resonator delete, Flowmaster Super-44s, VMAX TB, Stronger MAF, C.A.I. Intake with race scoop, and JRE Tune! WOT is my happy place!!

07-28-2010, 07:43 AM	#7
Edrock Drives: '10 Camaro 2SS LS3 Join Date: Jan 2009 Location: Jamestown, NC Posts: 964 View My Garage	Actually forgot to check for flapping OEM labels in the engine bay last night, BUT, on the interstate this morning, the noise became loud for a second then when to a low level where I could barely hear it. I suspect whatever it was finally tore off leaving a smaller piece behind. When I got to work, I popped the hood and was surprised to find so many OEM labels all over the engine bay so I removed as many as I could reach. When I head out at lunch today, we'll see how it goes from there. Will update then. __________________ DT Shorties, Solo hi-flow Cats, X-pipe, resonator delete, Flowmaster Super-44s, VMAX TB, Stronger MAF, C.A.I. Intake with race scoop, and JRE Tune! WOT is my happy place!!

07-28-2010, 12:22 PM	#10
Edrock Drives: '10 Camaro 2SS LS3 Join Date: Jan 2009 Location: Jamestown, NC Posts: 964 View My Garage	This is where I'm headed next in case anybody is interested. Will post results when I get a chance to get in there and check it out. Here's the thread: http://www.camaro5.com/forums/showthread.php?t=85122 Here are 2 important posts in that thread with clues on how to get in there: __________________ DT Shorties, Solo hi-flow Cats, X-pipe, resonator delete, Flowmaster Super-44s, VMAX TB, Stronger MAF, C.A.I. Intake with race scoop, and JRE Tune! WOT is my happy place!!

07-29-2010, 09:58 AM	#12
Hylton Drives: fanboys and ass kissers crazy. Join Date: May 2008 Location: Ottawa, Ontario Posts: 7,280	I have the same problem as well and the picture above gives me hope that it indeed comes from the passenger side filter. I am going to the dealership right now and I'll report back folks..... __________________ "BBOMG - More than just a car show.... It's an experience!"

07-29-2010, 11:39 AM	#13
Hylton Drives: fanboys and ass kissers crazy. Join Date: May 2008 Location: Ottawa, Ontario Posts: 7,280	Just got back. We removed the filter cover and filter and then cleaned everything in site in the box. Put everything back in and so far, so good! Easy job to do at home guys - 3 fasteners and the lid comes off quite easily. You'll notice the weather striping is intentionally cut to allow the lid to be removed. Attached Images __________________ "BBOMG - More than just a car show.... It's an experience!"

07-27-2010, 01:34 PM	#2
superman Drives: 2011 Camaro 1SS Join Date: Jul 2010 Location: North Jersey Posts: 296	Not to be condescending, but maybe a leaf or a piece of paper is caught in the intake or around the intake. You didn't say whether you checked that. Check the whole front bumper. You might only be able to hear it because 45 miles might be the exact speed required for that piece of paper to resonate - kind of like the drone you hear from aftermarket exhausts at certain rpms/speed. If it's a new sound, it's probably something stuck.

07-27-2010, 02:32 PM	#4
superman Drives: 2011 Camaro 1SS Join Date: Jul 2010 Location: North Jersey Posts: 296	Maybe that air filter is ripped or has a tear in it? causing air to blow by it and cause that paper flapping sound?

07-27-2010, 03:03 PM	#5
ffrcobra_65 Account Suspended Drives: SuperCharged 2SS/RS IOM MN6 Join Date: May 2009 Location: CA Posts: 5,094	look for loose part number labels in the engine bay.

07-28-2010, 10:48 AM	#8
jomo45 Drives: 2010 SS/RS Silver Ice Join Date: Jun 2010 Location: SW MO Posts: 70 View My Garage	Edrock, I have the exact same noise, been having a heck of a time describing it, thanks for the Leaf analogy!! I'll look this weekend for a parts tag, that does seem a likely suspect.

07-29-2010, 09:52 AM	#11
Hawkeye I am Iron Man Drives: LT M6 Join Date: Mar 2010 Location: West Point, GA Posts: 131 View My Garage	SAME EXACT PROBLEM HERE. It drives me crazy this sound. I've also been unable to describe the sound, thanks for the analogy. I will monitor this thread closely for a fix. I'll pray for one too, as I am the type of person that is highly annoyed by sounds like that. I can hear it over the radio too.

07-29-2010, 11:56 AM	#14
Hawkeye I am Iron Man Drives: LT M6 Join Date: Mar 2010 Location: West Point, GA Posts: 131 View My Garage	So did you find the debris? Was it a leaf or paper? Or did you not find anything specific and the noise just went away?