I know this has been discussed and thanks in advance for your replies...2018 LS with 25K that has developed an annoying whine that sounds like its turbo related. Has always been some noise but has increased greatly of late...
Any way to lubricate? Dealer issue? Covered by warranty?
Ideas?....Thanks

 

Maybe you have an air leak?

 

Definitely let warranty sort it out if you are still under warranty. I’ve never heard turbo whine in the LS; this symptom could be a harbinger of a larger one.

 

Update...#2 Idler Pulley bad. Lexus replaced at NC. Also did an EG1818 re-calibration for delay shifting to D and to stop bump at final downshift...Thanks for your replies

 

Bad pulley in 25K miles? Sheesh, should last 100K+ miles...

 

Must have been dry when installed, apparently a defect...

 

🤣🤣🤣

Why should a wear item "last 100k+ miles"? How bout tires.... they should "last 100k+ miles" too?

 

do you understand exactly what a pulley does, and how it operates? It in no way compares to a tire contacting a road surface.

 

🤣

How bout pads and rotors...They They should go at least 200k miles!🤣

 

What is idler pulley #2? Is that an idler on the serpentine drive belt? Thanks.

 

What a troll.

 

Pure gold right there.... pure gold.

 

i know from experience replacing tons (on other cars) that pulleys can go bad early. lots of pressure and heat. and spinning fast at over 10,000+ RPM. dirt/dust picks away at the seals, causing oil to seep/evaporate out and dry out the bearings and eventually kill them. if you lose the dust cap it accelerates it. so it greatly depends on operating conditions. another thing that can kill them is if the tensioner is worn out or goes bad.

bearings live a hard life. here is how the pulley looks