Cold start screeching noise

[coltonlaw1]

FYI: this seems to be happening on a percentage of all of the V-6's and not just Tellurides.

Have you found out anything else?

 

[keithfoco]

I was able to get this telly to briefly make the noise for me the other morning at about 30 deg F. Techline wants me to replace the oil filter. I guess they have these filters make some noise on other models. Temps arent going to dip below 40 for another week. so we will see.

 

[octavian_kia]

I am a Kia technician and I have heard this on a couple tellurides and can say that Kia has no idea how to fix this. I have a vehicle in today with this issue, but it is 45F degrees here so I have not been able to duplicate it. I was able to duplicate the noise on the last visit when temps were in the sub-zero range. Kia techline had me remove the throttle and remove a couple plastic "flaps" that were inside the intake manifold. the manifold is made by sandwiching two pieces of plastic together and them melting/vulcanizing the two pieces together. This techline agent thought it may be the plastic that squishes out where the pieces meet. Removing the "flaps" made no difference. I am pushing to have them authorize me to replace the intake manifold. I will update this thread if we find anything.

My first winter with the v6 Sorento, I didn't experience this sound. I did experience it this past winter.

Prior to this winter, I had the throttle body cleaned and did the intake valve cleaning service.

Is there any chance that getting this service done connects to what you have looked at?

 

[keithfoco]

My first winter with the v6 Sorento, I didn't experience this sound. I did experience it this past winter.

Prior to this winter, I had the throttle body cleaned and did the intake valve cleaning service.

Is there any chance that getting this service done connects to what you have looked at?

Its possible. My theory is that it is just a physics phenomenon related to the atmospheric conditions and the nuances built into the throttle body and intake. Meaning that when the conditions are correct, the throttle plate opens just enough to whistle. The moisture/ice built up on any of the parts involved could exacerbate the problem.

Update to my case: it has been cooler her and will be for the next few days. Kia techline had me bring the customer back in to change their oil and filter. I am very skeptical because the filter has no hard parts to it. It is just a fiber cartridge insert. it is totally possible that the oil filter cap could be making this noise because there is a valve inside it. Techline did not have me replace the oil filter cap though. Kia techline people are just guessing as are the techs because of how quickly this problem goes away which makes it incredibly difficult to nail down where the sound is coming from.

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[octavian_kia]

Its possible. My theory is that it is just a physics phenomenon related to the atmospheric conditions and the nuances built into the throttle body and intake. Meaning that when the conditions are correct, the throttle plate opens just enough to whistle. The moisture/ice built up on any of the parts involved could exacerbate the problem.

Update to my case: it has been cooler her and will be for the next few days. Kia techline had me bring the customer back in to change their oil and filter. I am very skeptical because the filter has no hard parts to it. It is just a fiber cartridge insert. it is totally possible that the oil filter cap could be making this noise because there is a valve inside it. Techline did not have me replace the oil filter cap though. Kia techline people are just guessing as are the techs because of how quickly this problem goes away which makes it incredibly difficult to nail down where the sound is coming from.

Not sure this helps, but when I get the sound I felt that it was coming from the passenger side area of the engine:

New video · Thursday, Jan 20, 2022 🎬

Tap to view!

photos.app.goo.gl

2nd one is a bit longer and I move back and forth, and might be a better video:

New video · Friday, Jan 21, 2022 🎬

Tap to view!

photos.app.goo.gl

3rd one is just the test I did the morning after the idler the idler pulley assembly was replaced by the dealer who also heard the noise briefly when they had it:

New video · Saturday, Jan 29, 2022 🎬

Tap to view!

photos.app.goo.gl

Over in the Kia Forums, someone noted that the sound does not start until 5-10 seconds after the car is turned on. They suggested also that is when the alternator kicked in. My dealer did say they replaced an alternator in another car for this issue and it didn't work.

 

[keithfoco]

Not sure this helps, but when I get the sound I felt that it was coming from the passenger side area of the engine:

New video · Thursday, Jan 20, 2022 🎬

Tap to view!

photos.app.goo.gl

2nd one is a bit longer and I move back and forth, and might be a better video:

New video · Friday, Jan 21, 2022 🎬

Tap to view!

photos.app.goo.gl

3rd one is just the test I did the morning after the idler the idler pulley assembly was replaced by the dealer who also heard the noise briefly when they had it:

New video · Saturday, Jan 29, 2022 🎬

Tap to view!

photos.app.goo.gl

Over in the Kia Forums, someone noted that the sound does not start until 5-10 seconds after the car is turned on. They suggested also that is when the alternator kicked in. My dealer did say they replaced an alternator in another car for this issue and it didn't work.

Great videos! I knew right away that it wasnt pulleys or alternator noise. It is a very high frequency vibration. Either caused by fluid or gas. You know that top engine cover comes off pretty easily? I would recommend pulling that off before starting it and I think you may find that the noise sounds like it comes from a different area.

I have had a stethoscope handy when i have witnessed this and every time it is coming from the throttle body area/intake area. I am not doubting your evidence, I am merely pointing out that you didnt have the engine cover off which makes it even that much harder to nail down, which also happened to me the first time I saw this condition.

I just wish we could get it to make the noise as long as it made it for you. it just doesnt get cold enough for long enough (thank goodness!) here in my part of Colorado. I had one opportunity where it was about zero F and it made the noise for about 20-30 seconds. I had my stethoscope handy which made me believe it was the throttle area. I may be wrong though. It was only 30F last night and the vehicle made no unusual noises this morning from what the service advisor told me.

 

[octavian_kia]

Great videos! I knew right away that it wasnt pulleys or alternator noise. It is a very high frequency vibration. Either caused by fluid or gas. You know that top engine cover comes off pretty easily? I would recommend pulling that off before starting it and I think you may find that the noise sounds like it comes from a different area.

I have had a stethoscope handy when i have witnessed this and every time it is coming from the throttle body area/intake area. I am not doubting your evidence, I am merely pointing out that you didnt have the engine cover off which makes it even that much harder to nail down, which also happened to me the first time I saw this condition.

I just wish we could get it to make the noise as long as it made it for you. it just doesnt get cold enough for long enough (thank goodness!) here in my part of Colorado. I had one opportunity where it was about zero F and it made the noise for about 20-30 seconds. I had my stethoscope handy which made me believe it was the throttle area. I may be wrong though. It was only 30F last night and the vehicle made no unusual noises this morning from what the service advisor told me.

Yeah, in one of my videos I did mention that the sound could be reverberating. I actually have more videos lol.

But your comment about the intake area did get me thinking about the intake and throttle body service I did. I'll mention what you found to my dealer the next time.

 

[keithfoco]

I just want to add that just because I work at a Kia dealership, I do not speak for KIA corporate in any form or fashion. Please do not take what I say as any official statement made by KIA. I am merely a lowly tech trying to figure this out as well along with about 20 other impossible-to-determine problems.

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[octavian_kia]

I just want to add that just because I work at a Kia dealership, I do not speak for KIA corporate in any form or fashion. Please do not take what I say as any official statement made by KIA. I am merely a lowly tech trying to figure this out as well along with about 20 other impossible-to-determine problems.

Understood 100%! I'm also in Canada, so even if Kia USA did something to fix it, there would be no guarantee that Kia Canada would do it automatically.

 

[keithfoco]

Understood 100%! I'm also in Canada, so even if Kia USA did something to fix it, there would be no guarantee that Kia Canada would do it automatically.

true. I dont think they cross-talk much, if at all.

 

[TnMtnMan]

If it is a leak on the intake, I would hook up a smoke machine and see where it is leaking from.

Far simpler to take a can of carb cleaner and spray on the intake manifold gasket area and see if the sound changes. Thing is, if KIA is being honest, and it's just ice formation in the intake, it's really not an issue-it's not doing any harm. If that's all it is, I'd just chalk it up as a "quirk", not a problem. By the initial description I would have though belt squeal as well-but that primarily happens with V-belts not serpentine (that I've personally seen) and the sound did NOT sound like a belt or bearing of any kind.

Did the sound go away if the RPM was increased slightly? And does this only happen at idle, not when in gear and driving?

 

[keithfoco]

Far simpler to take a can of carb cleaner and spray on the intake manifold gasket area and see if the sound changes. Thing is, if KIA is being honest, and it's just ice formation in the intake, it's really not an issue-it's not doing any harm. If that's all it is, I'd just chalk it up as a "quirk", not a problem. By the initial description I would have though belt squeal as well-but that primarily happens with V-belts not serpentine (that I've personally seen) and the sound did NOT sound like a belt or bearing of any kind.

Did the sound go away if the RPM was increased slightly? And does this only happen at idle, not when in gear and driving?

it changes/goes away when you hit the throttle. I have never heard any mechanical breakdowns happening from this issue. If Kia started seeing a bunch of problems stemming from this noise, they would look into it harder. Since it doesnt cost them any money, its all good to them. P.S. as a tech, I dont get paid by Kia for issues that I cant duplicate or fix. So everyone is fighting that also. Also: some techs are going to just "throw a part at it" to get paid, even though it may not fix it. The right person with deep pockets and sues over it, will get something happening with this issue. I am only gong to spend so much time because I am not being compensated for this work. I did get paid to remove and modify the intake one time because I was directed to by Kia techline.

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[octavian_kia]

Far simpler to take a can of carb cleaner and spray on the intake manifold gasket area and see if the sound changes. Thing is, if KIA is being honest, and it's just ice formation in the intake, it's really not an issue-it's not doing any harm. If that's all it is, I'd just chalk it up as a "quirk", not a problem. By the initial description I would have though belt squeal as well-but that primarily happens with V-belts not serpentine (that I've personally seen) and the sound did NOT sound like a belt or bearing of any kind.

Did the sound go away if the RPM was increased slightly? And does this only happen at idle, not when in gear and driving?

I didn't increase the RPM. But it's certainly not a quirk....on very cold mornings here the house is loud enough and lasts long enough that it disturbs my neighbours.

 

[Telmi]

And . . . . this thread will pick up again in January '23!

 

[locorecto]

Looking forward to this winter again and see if this issues gets addressed. There will be more Tellurides/Sorentos/Grand Carvnivals out there after another year, maybe techs will get a better chance to replicate/address this annoyance.

 

[G-737393]

Looking forward to this winter again and see if this issues gets addressed. There will be more Tellurides/Sorentos/Grand Carvnivals out there after another year, maybe techs will get a better chance to replicate/address this annoyance.

You are not wrong. Here it comes!

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[octavian_kia]

Looking forward to this winter again and see if this issues gets addressed. There will be more Tellurides/Sorentos/Grand Carvnivals out there after another year, maybe techs will get a better chance to replicate/address this annoyance.

Yes I'll be chasing this one down when it gets cold again.

 

[G-169099]

If your drive mod is in eco, try changing it to comfort. I don't know why, but that reduced the duration and volume by 90%, (meaning it makes small noise that fades in a second) for me.

 

[Drbischo]

Yes I'll be chasing this one down when it gets cold again.

New England winter has returned and so has the elusive high pitched calls of the V6 Tellie. 2020 EX.

 

[Dolcevita84]

No one figured this out yet? This is my second winter with my telluride and first year experiencing this awful noise. What is going on here