05+ VVTI engine knocking noise? link included

[grandpapa]

On our 06 Limited, it has some kind of "knocking" noise.

unlike the TSB, the knocking noise from our engine actually start when the engine is warm. It kind of like knock, knock, knock, knock, knock...it has some "echo", "metal" type of sound.

I find a youtube link that show the sound I tried to explain

You Tube

You Tube

listen to the knocking (NOT the noise from the bell) that's the sound my Avalon has as well.

Just wonder anyone has input on that?

[grandpapa]

many read but no input from anyone?

[boosted-fc3s]

What type of Oil are you using? What about OEM filter or aftermarket?

[inov8]

What is the setting of your climate control when you hear the knocking? Is it the same with the A/C on and off? All I hear in the video is something that sounds like a belt tensioner moving.

[Tom in Tacoma]

Kind of difficult to tell listening to it over speakers. No directional sense.

I see you're in Seattle - what area?

[messerchmidt]

do a seafoam treatment and an oil change after that, see if it helps. carbon buildup may be causing a valve to stick

if not, do a tune-up

[grandpapa]

Originally Posted by inov8

What is the setting of your climate control when you hear the knocking? Is it the same with the A/C on and off? All I hear in the video is something that sounds like a belt tensioner moving.

use a headphone and you should hear 2 different sounds (kind of)
the knocking sound can be heard after the car is warmup

nothing to do with AC setting. (no different with ON/OFF, or AC at all)

[grandpapa]

Originally Posted by boosted-fc3s

What type of Oil are you using? What about OEM filter or aftermarket?

I don't know since I took the car to dealer, I guess whatever they use?
everything is stock, OEM toyota part, no aftermarket

[grandpapa]

Originally Posted by Tom in Tacoma

Kind of difficult to tell listening to it over speakers. No directional sense.

I see you're in Seattle - what area?

I am at UW area, you in Tacoma?

[grandpapa]

update

took it back to Lexus (where I picked up the car) and the service manager mentioned the noise is a bit loud and asked me to take it to a Toyota dealer and see what they said)

So I took it to the dealer, 1st visit, rode with a tech and he agreed the noise was little loud and wanted to check it out more. The next day, I dropped my car off, few hours later, got a call back and TOYOTA told me they check everything and engine seems normal, asked me to check the engine oil and if I see any decrease, should let them know, no error code, no leak.

they also told me that engine was 1st used on 05+ and they saw oil line failed but otherwise, a pretty solid engine.

[Tom in Tacoma]

Originally Posted by grandpapa

I am at UW area, you in Tacoma?

I'm actually in DuPont (been using this handle for a long time now...) and commute daily to Redmond. Thought if we were to cross paths I could listen to it first hand - but it sounds (no pun intended) like you've got it under control already.

[grandpapa]

Originally Posted by Tom in Tacoma

I'm actually in DuPont (been using this handle for a long time now...) and commute daily to Redmond. Thought if we were to cross paths I could listen to it first hand - but it sounds (no pun intended) like you've got it under control already.

that's a commute...luckily, the Avalon is pretty comfy

[Tom in Tacoma]

Yessir it is! It's 125-miles round trip, 4 times a week. The '07 will roll over 80k on the odometer tomorrow. Still running like it was new.