Need Help Diagnosing Whistling Sound at Idle

[fumetsu]

Playing: LX470 Audio Clip for Diagnosis.mp3 - picosong

It's some kind of whistling sound I'm having trouble diagnosing. I know it's tough to pinpoint based on an audio clip, but can anyone at least tell me where to start looking to fix this?

Thanks.

 

[2001LC]

I don't hear a whistling. Perhaps you're hearing a serpentine belt, tensioner or idler bearing singing to you. These are often loudest when cold. I use a harbor fright stethoscope to pin point bad bearings. Dirty PCV valve with worn grommet and/or hose will suck air.

 

[Julian Stead]

I don't hear a whistling. Perhaps you're hearing a serpentine belt, tensioner or idler bearing singing to you. These are often loudest when cold. I use a harbor fright stethoscope to pin point bad bearings. Dirty PCV valve with worn grommet and/or hose will suck air.

Agree, does sound like a bearing, try removing serp belt and feel idler and tensioner bearings.

 

[fumetsu]

Thanks all. Will do!