Whistling and ticking noise on LS3

[saurabh_goyal93]

Hey everyone, need your help. I have a 2016 WN Caprice with LS3 and I just noticed a whistling noise and a ticking noise on idle. The car has 260k kms (mostly highway kms) and has been serviced at regular intervals. Any idea as to what it could be? Lifters maybe? Not sure what's causing the whistling noise.

Video: https://drive.google.com/file/d/16wwvcjOQhiyjsccUEAAnbaIrD9virT6K/view?usp=drivesd

 

[dassaur]

Hey everyone, need your help. I have a 2016 WN Caprice with LS3 and I just noticed a whistling noise and a ticking noise on idle. The car has 260k kms (mostly highway kms) and has been serviced at regular intervals. Any idea as to what it could be? Lifters maybe? Not sure what's causing the whistling noise.

Video: https://drive.google.com/file/d/16wwvcjOQhiyjsccUEAAnbaIrD9virT6K/view?usp=drivesd

Doubt lifters are making that whistling noise. Apart from that random whistle it sounds fine to my undiscerning ears.
Take off the engine cover and check all hoses, could be one loose. With the cover off you should be able to pinpoint where it's coming from.

 

[Redline457]

Whistling could be a vaccum leak, as Dassaur said take the cover off and check all the hoses

 

[saurabh_goyal93]

Thanks guys. The whistling noise seems to have quietened down but the ticking noise is very prominent. Is it from lifters or just the injector noise? Video link below.

LS3 Noise 2.MOV

drive.google.com

Also, will this help if it's the lifters? https://www.liqui-moly.com/en/hydraulic-lifter-additive-p000004.html#1009