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Resonating Noise at 3000rpm #5333931 01/27/20 05:28 PM
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tookien Offline OP
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I have a reciprocating/resonating wavy bass sort of noise at 3000rpm and above. rav4 2003 2.0L.

No vibrations, no ticking noise. The noise isn't that loud, but consistent.

Checked engine mounts all good.
Checked for any loose heat shields all good.

Right when I let go of the gas it goes away, even at 2900rpm.

It sounds related to intake or exhaust.

Last edited by tookien; 01/27/20 05:32 PM.
Re: Noise at 3000rpm [Re: tookien] #5333934 01/27/20 05:31 PM
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Irrespective of vehicle speed?


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Re: Noise at 3000rpm [Re: gathermewool] #5333937 01/27/20 05:33 PM
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tookien Offline OP
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Originally Posted by gathermewool
Irrespective of vehicle speed?


Yes.

Re: Noise at 3000rpm [Re: tookien] #5333939 01/27/20 05:35 PM
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02SE Offline
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I'd check the entire exhaust system routing. I'd place strong odds on the exhaust system having rotted out somewhere along it's length, and the pipe is now resting against something and resonating.

Re: Noise at 3000rpm [Re: gathermewool] #5333940 01/27/20 05:36 PM
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tookien Offline OP
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Originally Posted by gathermewool
Irrespective of vehicle speed?


While holding the throttle open at 3000 rpm or above, it starts.

I let go of the gas/throttle a little and it stops.

Last edited by tookien; 01/27/20 05:36 PM.
Re: Noise at 3000rpm [Re: 02SE] #5333944 01/27/20 05:37 PM
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tookien Offline OP
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Originally Posted by 02SE
I'd check the entire exhaust system routing. I'd place strong odds on the exhaust system having rotted out somewhere along it's length, and the pipe is now resting against something and resonating.



Thanks, good idea.

Re: Noise at 3000rpm [Re: tookien] #5333955 01/27/20 05:56 PM
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PontiacHO Offline
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A baffle in a muffler can be loose as well as the inner guts of a cat converter. Idler/ belt tensioner may be worn (accessory or timing belt). Loosen/remove accessory belt and bring it up to the RPM that the vibration is happening. Some vehicles are engineered such that the torque converter can be separated from the flex plate so that can be eliminated as a source for the vibration. Sometimes vibrations are tough to isolate....

Re: Noise at 3000rpm [Re: tookien] #5333962 01/27/20 06:02 PM
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Olas Offline
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your description first made me think exhaust drone - second place I went to was a wheel bearing noise. does it make the noise in every gear?

Re: Noise at 3000rpm [Re: PontiacHO] #5333964 01/27/20 06:06 PM
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tookien Offline OP
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Originally Posted by 02SE
I'd check the entire exhaust system routing. I'd place strong odds on the exhaust system having rotted out somewhere along it's length, and the pipe is now resting against something and resonating.



Thanks, good idea.
Originally Posted by PontiacHO
A baffle in a muffler can be loose as well as the inner guts of a cat converter. Idler/ belt tensioner may be worn (accessory or timing belt). Loosen/remove accessory belt and bring it up to the RPM that the vibration is happening. Some vehicles are engineered such that the torque converter can be separated from the flex plate so that can be eliminated as a source for the vibration. Sometimes vibrations are tough to isolate....


Good idea with the belt/tensioner pulley.

The vehicle does make a squeaking noise when started up but eventually goes away.
I traced the squeaking to the belt/tensioner pulley, which I will come around to replacing.

But I don't really know if this noise is related.

Re: Noise at 3000rpm [Re: Olas] #5333966 01/27/20 06:07 PM
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tookien Offline OP
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Originally Posted by Olas
your description first made me think exhaust drone - second place I went to was a wheel bearing noise. does it make the noise in every gear?



Definitely not wheel bearing noise. I did replace the front wheel bearings.

This noise was pretty much there since I bought the vehicle.

Re: Noise at 3000rpm [Re: Olas] #5333968 01/27/20 06:10 PM
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tookien Offline OP
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Originally Posted by Olas
your description first made me think exhaust drone - second place I went to was a wheel bearing noise. does it make the noise in every gear?



Drone noise from exhaust could be it.

Re: Noise at 3000rpm [Re: tookien] #5333969 01/27/20 06:11 PM
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tookien Offline OP
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Thanks for all the ideas, I will look into them

I don't know why but the noise kind of sounds like it's coming from around the throttle body area, but I checked and don't see anything wrong there. No vacuum leaks or anything.

Re: Noise at 3000rpm [Re: tookien] #5333972 01/27/20 06:13 PM
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PontiacHO Offline
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Is this noise, drone, or vibration detectable at the RPM noted while sitting still or does the car have to be moving? Does it have an electric cooling fan or mechanical fan (fan clutch)??

Re: Noise at 3000rpm [Re: tookien] #5334100 01/27/20 08:04 PM
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tundraotto Offline
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loose internal exhaust baffle or loose exhaust heatshield is what I'd look for first.

Re: Noise at 3000rpm [Re: tookien] #5334260 01/27/20 10:30 PM
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Nick1994 Online Content
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Ever touch the CV axles? I had a VW that after putting on an aftermarket axle, it vibrated at 2k RPMs regardless of speed.


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