Whistling type noise from engine bay

[Fantom Blu]

No codes what so ever. I'll tell the dealership to check the pcv valve, wastegate actuator pin, turbo, exhaust manifold, and every damn seal, pipe, and hose.


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[Flyer]

Pull the dipstick and see if it goes away.

 

[Fantom Blu]

GM told them to replace the valve cover, that didn't fix it. They then tracked the noise to the belt area, took off the belt noise went away, put the belt back on and removed the coolant cap while the engine was running, noise went away. They replaced the water pump and the noise went away. I took the car for a nice long drive around the dealership and the whistle is definetly gone.

 

[Fantom Blu]

Pull the dipstick and see if it goes away.

I was at the dealership for the second oil change originally, they changed the oil and the noise went away, I got in the car let it run for a minute and the noise came back. It had nothing to do with the oil.

 

[Blue Moon Sonic]

A lot of the issues the sonic has, the cruze has as well so it really doesn't surprise me. Actually I find it funny that it's actually pretty easy for these turbo's to go out and pretty quickly. I know a cruze owner up here in in cheese land where all he has done is a down pipe, ported intake manifold and no tune and his turbo has lasted him for 86k with out a lick of trouble. Could be the way he drives though.

 

[Flyer]

It seems there was a bulletin about the crankshaft seal causing a noise. Pulling the disstick was the indicator if that was it or not.

 

[Fantom Blu]

It seems there was a bulletin about the crankshaft seal causing a noise. Pulling the disstick was the indicator if that was it or not.

That was the first thing done. It didn't fix the problem.


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[Ontario Sonic]

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

 

[Llia]

My whistle starts off subtle then quickly gets loud, then slowly fades. Thing is, it will do this even when the car is off. Usually when I just turned the car off or am idling.

 

[Kannisto]

My car used to do this almost every time it ran. I came to the conclusion that there was an air bubble in my water pump. If you remove the cap on the reservoir (with the car NOT running) and squeeze the large hose going from the pump to the rad a few times you will force the air bubble out of the pump and into the open reservoir. You will know you're squeezing the right hose when you see a little coolant being pushed into the reservoir when you squeeze it. If the sound doesn't go completely away the first time then just repeat until it's gone. I believe it took me 2 or 3 startups.

This seems to be a permanent (and very easy) fix, so there is no need to replace the water pump like most people are doing. I know the high pitch noise from the pump is a common issue on the 1.4 so i really hope more people read this.

 

[Couch]

i also had a new waterpump installed under warranty for the same noise.

 

[Natesriv]

I can't help myself

 

[SourKandi]

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

I had this same noise and the dealer thought I was crazy. Same area of the car, even recorded it and played for the service department. However, after one of my many trips for repairs I have had the water pump replaced (warranty recall), and water inlet seal replaced, and the noise mysteriously went away. I like the idea of the air bubble tho that would have been good to try about 2 years ago!

 

[Kannisto]

I had this same noise and the dealer thought I was crazy. Same area of the car, even recorded it and played for the service department. However, after one of my many trips for repairs I have had the water pump replaced (warranty recall), and water inlet seal replaced, and the noise mysteriously went away. I like the idea of the air bubble tho that would have been good to try about 2 years ago!

Yep i can almost guarantee there is no need to replace the water pump. I had this same problem and once i got the air bubble out the sound never came back.