Deleted

 

Here is the link to the my YouTube page with the video I just took.
I searched how to post videos again and figured it out.
You can hear the intermittent rattle sound over the normal sound of the motor.

 

I have also just removed the belt and listened for the rattle as well and I don’t think I could hear it very much without the belt, so that could narrow it down to the accessories.
However I could not run it for long with the belt off as it was already hot, and without the belt on it is hard to hold it at the rpm that the rattle occurs.
Also, another symptom I forgot is a there is a consistent rattle when first start the car while the engine is cold until the engine warms up in the morning after first start for maybe 5 mins, but it sounds more consistent and less intermittent of a rattle.
Thank you for any help with this diagnosis.

 

Only a few guesses:

Any cracks or loose plastic on/within the intake manifold?

Any loose fragments within the catalytic converter?

Are both the intake and exhaust manifold gaskets firmly in place, with no gaps?

Is the exhaust heat shield held firmly in place, with no loose screws?

 

I'd rule out exhaust leaks by taking to a muffler shop.

 

Chassis Ear Auto Diagnostic Tool Kit, Electronic Stethoscope with 6 Channel Pinpoint the Troubling Engine Noises (Over-Ear Headphones)

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Thank you both for your suggestions. I will do my best to try to verify the intake and exhaust manifold gaskets, and I have had exhaust leak as a guess of mine in the past as well.

From the other threads I’ve read with the rattle with the 2AZ, I have learned about the intake, rattle and the heat shield and catalytic converter rattle.

So last night after I made the video, I had my wife hold the engine revved up at the RPM the rattle is caused (with the motor in drive with her foot on the brake, I have a kind wife lol) and I used a ratchet extension to try and listen around the motor for the sound.

I listened to the heat shielding around the exhaust and it’s not coming from there. I even put the extension onto the cat converter and listened, but I did not hear it their either. It’s very difficult to pinpoint because I believe the sound travels around the motor. I was not able to pinpoint the sound with the ratchet extension (a pretty crude tool to listen with) between 1400 and 1600 RPM, but at idle if I put the ratchet extension on the nut that you use to release the tension on the tensioner, I could hear a slight rattle in it that mimics the sound that I hear at the problem RPMs.

However based on the sound, I don’t believe that the tensioner is my only rattle and am leaning towards one of y’all’s suggestions, or I’ve even thought VVT rattle or timing chain guide, because when I listen with my ear sometimes it sounds like it’s coming from the front of the motor, but I swear this sound travels around the motor. I did put the ratchet extension along the timing cover and I could not hear it through the ratchet.

I’m going to do more investigation please any more feedback would be appreciated or any suggestions

I know a very experienced local mechanic here in Houston that I’ve been putting off taking this to to have him diagnose because it runs fine and it’s just annoying. I just don’t want to miss a potential bigger problem if it’s timing chain guide or VVT sprocket.

RomanJohn1001, I thought your post was an ad at first, so I missed it. But yeah, I’ve never seen that tool before I’m going to look into it it seems very useful, and I hate being annoyed with random engine rattle sounds.

Today, I’m going to try and make another, better video today with a higher quality, plug-in microphone I have so that I maybe I can give y’all a better idea as I watched my video and it’s hard to hear the rattle over the normal sound of the motor, although if you listen closely around 16-18 second in the video it’s a little clearer sound of the rattle over the sound of the motor.

The rattle sound is not related to engine speed as in it does not follow the rpm of the engine like bearing knock would.

It’s always an intermittent rattle.

 

The item is listed on Amazon. This item is the wired type. There is also a wireless type that is more expensive, but you don't have to deal with wires. If you get one, let us know how it worked out.

 

Used this to find the rattle on my old Camry (was the intake manifold) Mechanics Stethoscope (harborfreight.com) $7

 

Cool! I think I’m going to go get one of those.

Does anyone think Thai sounds like knock, pinging, or preignition to anyone?


Because it sounds like that to me while driving.

I’m going to get some premium gas today while I’m doing my deliveries at work and see if that helps and make another video when I get home.

 

For internal cleaning possibly there is some passages intentioner internally possibly because of carbon or sludge is not acting correctly. I like ATS automotive test solutions Automotive Test Solutions | Automotive diagnostic tools for the smart technician

 

Update:

I did my deliveries at work yesterday, using the premium gas I filled up with.

There was no change to the rattle sound throughout the day.

Therefore, even though it sounds like pinging to me, sometimes that kind of leads me in a different direction away from pinging.

I haven’t had a chance to go by Harbor freight yet and get the mechanics stethoscope, but when I do, I will report back if I find out what the rattle was.

Everything I’ve read, and then also a lot of others experience, always points to the intake, manifold, rattle, which I know is common on my year Camry.

 

I hear a ticking noise. If that is what you are concerned about it could be from the PCV. Also could be injectors.

 

I had a similar problem with my 2AZFE (218k miles). You mentioned you ran the engine without the belt. What I did is removed the belt and I turned the accessory pulleys by hand looking for any roughness. It turned out to be the water pump. Try this on your a/c compressor, tensioner, water pump. Although you did change the latter two, I would check them just to be sure. Check for any play in the pulleys you cannot turn by hand. I hope this helps.