Hey all, i took a look around the forum and couldn't find a thread that covered this issue specifically, but this was as close as i could get.
I've had my Sonic for about 6-7 weeks now, and as far as i know this sound wasn't there when i bought it. I noticed a couple days ago when i pulled into the drive way, i got out of the car before i turned it off and i noticed a slight high-pitch whistling sound. Now, when i am in the car i can not hear it at all, driving and everything all sound normal and the car is running perfectly fine with no issues. The sound only seems to appear when i am parked and every time i have heard it, all HVAC systems were off and the car was at idle.
I am not losing any coolant and the water pump seems fine (others on the interweb seemed to point to coolant loss and/or the water pump as a potential culprit) and it does not seem to be coming from any of the pulleys in the serpentine area. All of my previous automotive experience has been with 3800 series II engines as all my previous cars have had them... so little 4 banger turbos are a brand new experience for me and i'm not sure what all is normal yet.
I've included a video i took this morning of the sound, and it seems like it might be coming from one of the lines in the back left of the engine bay, up against the firewall, although i may be mistaken as sound likes to trick you in tight spaces like that.
If you want to watch the video and give a listen, maybe one of you guys can help and tell me if this is normal or abnormal.
It is important to note that the mic on my phone really picked up the sound and kind of blew it out of proportion, the actual whistling sound is probably 40%-50% quieter than it sounds on the video, if that helps with diagnostics. I know its hard to pinpoint, i'm really just looking for a list of any and all things that are likely to cause a sound like that in the passenger side of the engine bay so i can give a short list to the tech if i have to go see one. Thanks in advance for any help
https://www.youtube.com/watch?v=faUsRo-hncE