Strange sound, need help! - AcuraLegend.Org - The Acura Legend Forum for All Generations of the Honda / Acura Legend; 1986 to Present

91RosewoodBrown · 10-29-2009, 03:59 PM

I've noticed for a while now this weird sound, sounds like vibrating metal from in the cabin, and happens when I accelerate at low speeds (5-20mph).

I got underneath the car today to see if I could spot the vibration, but turns out it is actually an air escaping sound, almost like a small blowoff valve. It originates around this area, in front of the cat converter, around the rear of the transmission (MT).

Part 16 in that picture is a nasty looking gasket, but to my surprise, that isn't the part making the noise, but rather above/around it.

This is a subtle but annoying issue, wondering if anyone has any idea what this might be. Thanks for your help!

arias · 10-29-2009, 09:49 PM

You probably need to replace the flange gasket between the cat and the Y pipe.

legend8800 · 10-30-2009, 06:57 AM

I know I had a vibrating sound a while back ago. It turns out the heat shield for my cat was falling apart, so I just got rid of it. I'm not sure about the air escaping sound though.

MXHalofan · 10-30-2009, 07:18 AM

If it's not that gasket, might be the y pipe gaskets. Or you might have a cracked pipe.

10-29-2009, 03:59 PM	#1
91RosewoodBrown Legend Enthusiast Join Date: Jun 2009 Location: South Carolina Posts: 1,573 '91 ACURA Legend Sedan Base Model Real Name: Ben	Strange sound, need help! I've noticed for a while now this weird sound, sounds like vibrating metal from in the cabin, and happens when I accelerate at low speeds (5-20mph). I got underneath the car today to see if I could spot the vibration, but turns out it is actually an air escaping sound, almost like a small blowoff valve. It originates around this area, in front of the cat converter, around the rear of the transmission (MT). Part 16 in that picture is a nasty looking gasket, but to my surprise, that isn't the part making the noise, but rather above/around it. This is a subtle but annoying issue, wondering if anyone has any idea what this might be. Thanks for your help! __________________

10-30-2009, 07:18 AM	#4
MXHalofan Type O Master Join Date: Jun 2009 Location: Kansas City Missouri Posts: 1,188 '94 ACURA Legend Coupe LS	If it's not that gasket, might be the y pipe gaskets. Or you might have a cracked pipe. __________________ 91 Coupe LS black on black 94/95 front bumper and rear deck lid GS wheels

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10-29-2009, 09:49 PM	#2
arias Gold Member Join Date: Oct 2009 Location: Los Angeles, CA Posts: 726 '94 ACURA Legend Coupe LS '98 MAZDA MPV '91 HONDA ACCORD '91 ACURA Legend Coupe L	You probably need to replace the flange gasket between the cat and the Y pipe.

10-30-2009, 06:57 AM	#3
legend8800 Member Join Date: Jun 2009 Location: Old Bridge, NJ Posts: 165 '91 ACURA Legend Sedan L	I know I had a vibrating sound a while back ago. It turns out the heat shield for my cat was falling apart, so I just got rid of it. I'm not sure about the air escaping sound though.

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