Recently I have been noticing a squeak /scribble noise coming from the serpentine belt area. The noise seems to get more noticeable when car idles lower or warms up and has been running. I have not noticed any leaks or overheating. I have replaced the idler pulley. Did water test on the belt and it does not make sound go away. Please check out vid and let me know what you think. Sorry for the short video(Size limit restrictions)
Thanks !



Mileage: 158k

 

Anyone know this sound?
please help.

 

Maybe it’s your timing belt

 

IS250 has a timing chain.

 

Hello,
i have the same “chirp” noise coming from the front of my car, it’s only noticeable when stoped at a light. I notice the chirp noise goes away if I switch the gear to neutral while waiting on a light. Not sure if it’s engine or trans issue; the noise does not affect drivability.
At some point I’ll address that, right now I’m trying to figure out a grinding noise that only come up when I drive on wet roads.

06 Lexus IS250 AWD

 

sounds like a bearing/pulley and belt issue

 

I see you have replaced the idler pulley.

Check the tension on your belt, it could just be a loose (or otherwise very tight) belt. If the belt is old, replace it before debugging the issue.

Good luck.