Any chance it could be a faulty EGR valve?
2022 Tucson Hybrid 1.6T engine Ping
On several occasions, I have noticed the 1.6T engine will significantly ping (a rattling-tin-can-like sound coming from the engine).
This condition is reproducible and ONLY occurs when the vehicle has been driven for a significant amount of time on a long distance trip (say, 50 mi or more) where the engine is allowed to reach normal operating temperature AND the vehicle is subsequently shut off for a short period of 10-30 minutes (about the time for a typical store visit). After restarting the vehicle and beginning to drive after that short period is when the noticeable pinging begins (I'll call this the "second drive").
It's as if a sensor or computer module is misinterpreting engine conditions during that "second drive" described above and not calculating the correct air/fuel mixture. When the pinging is experienced, it is quite noticeable and I have tried different drive modes and increasing the RPMs using the paddle shifters with no improvement. I have also tried pulling over and restarting the vehicle, and again with the same pinging outcome. Of course in EV mode, this condition doesn't apply.
If the Tucson Hybrid is allowed to completely cool down, it drives normally again (no engine pinging).
After some research, others describe having had the same experience with the 1.6 Turbo engine as far back as 2012. The vehicle is not throwing any codes based on my scan tool, but it's possible the vehicle is too new for my scanner.
If anyone else notices a similar condition on the Tucson Hybrid, please report here. My concern taking this to a dealership at this point is that it's challenging for a service center to reproduce because of the time it takes, and, I don't want to hear, "we couldn't reproduce the scenario". If enough others are experiencing the same, it demonstrates a systematic problem. Otherwise, it could be an isolated problem on my vehicle that just needs to be addressed.
This condition is reproducible and ONLY occurs when the vehicle has been driven for a significant amount of time on a long distance trip (say, 50 mi or more) where the engine is allowed to reach normal operating temperature AND the vehicle is subsequently shut off for a short period of 10-30 minutes (about the time for a typical store visit). After restarting the vehicle and beginning to drive after that short period is when the noticeable pinging begins (I'll call this the "second drive").
It's as if a sensor or computer module is misinterpreting engine conditions during that "second drive" described above and not calculating the correct air/fuel mixture. When the pinging is experienced, it is quite noticeable and I have tried different drive modes and increasing the RPMs using the paddle shifters with no improvement. I have also tried pulling over and restarting the vehicle, and again with the same pinging outcome. Of course in EV mode, this condition doesn't apply.
If the Tucson Hybrid is allowed to completely cool down, it drives normally again (no engine pinging).
After some research, others describe having had the same experience with the 1.6 Turbo engine as far back as 2012. The vehicle is not throwing any codes based on my scan tool, but it's possible the vehicle is too new for my scanner.
If anyone else notices a similar condition on the Tucson Hybrid, please report here. My concern taking this to a dealership at this point is that it's challenging for a service center to reproduce because of the time it takes, and, I don't want to hear, "we couldn't reproduce the scenario". If enough others are experiencing the same, it demonstrates a systematic problem. Otherwise, it could be an isolated problem on my vehicle that just needs to be addressed.
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Same with my HEV. Here's my observation: When parked/stationary and the ICE comes on to recharge the battery, I can hear a constant rattling noise when the generator kicks in and starts to feed charge to the battery. There's no such noise if the ICE is on without charging taking place. I believe it may be that same noise (but more intense) that I'm hearing when heading up a steep hill. Thoughts?
I have a 2022 Tucson Ultimate Hybrid with 7350 km (4600 miles) which had its first oil change last week at the dealer. They heard the chattering noise but could not pinpoint the cause. Their standard reply was : monitor the noise and if it gets worse bring it in. It sounds like the engine has no oil but it does. When the engine is cold there is no noise. Similar complaint as other Tucson owners—when engine is good and hot, chattering or pinging on acceleration is very noticeable.
There's a law firm, Lemberg Law, that is apparently interested in this engine issue. It's possible they are pursuing a class-action suit. Their phone # is 203-653-2250 (LembergLaw.com). Since Hyundai's warranty is practically useless, this may be the only avenue to get their attention.
I get some valve train noise under load sometimes, but what I find amazing is the virtual lack of any turbo whine or air intake noise under any circumstance and the seamless transition between gas and electric power. It is one of the quietest engines I have ever had in a car.
I have the exact same problem with a brand new Hyundai Sonata Hybrid Ltd. Driven only 900 miles. No turbo engine. The noise is driving me crazy. It is really loud in ECO mode. In SMART and SPORT, it is much more subdued. Needless to say, I sorely regret buying a Hyundai car. Never again.
Best/ most intuitive explanation I could find online is the one linked below, which coincides with the OP's supposition:
https://www.reddit.com/r/sonata/comments/yjp19d/_/iupx8bk
Best/ most intuitive explanation I could find online is the one linked below, which coincides with the OP's supposition:
https://www.reddit.com/r/sonata/comments/yjp19d/_/iupx8bk
Over 18 months after starting this thread, the pinging or valve-train issue continues to annoy each time the vehicle is driven. Multiple trips to the Hyundai dealer has resulted in no solution, rendering the 10-year warranty in my mind as a gimmick. My first Hyundai and ...
Have you guys considered downgrading to a gas version? I like the hybrid but here's some reasons it can be trouble,
-first and worst issue is GDI
- now add a dirty turbo on top of that
-if that's not bad enough then add an electric motor as well.
You can fix a gas or electric car pretty easy
But fixing both at the same time under one hood that's trouble
Generally the ping is normally valves/and or direct injection injectors.
Also unconfirmed but there's a rumor the gas is only pressurized when it reaches the camshaft area,
There is a pump connected to a special camshaft lobe.
That can also be the noise maker.
-first and worst issue is GDI
- now add a dirty turbo on top of that
-if that's not bad enough then add an electric motor as well.
You can fix a gas or electric car pretty easy
But fixing both at the same time under one hood that's trouble
Generally the ping is normally valves/and or direct injection injectors.
Also unconfirmed but there's a rumor the gas is only pressurized when it reaches the camshaft area,
There is a pump connected to a special camshaft lobe.
That can also be the noise maker.
The gasoline doesn't get near the camshaft, but the high pressure fuel pump is mechanically driven by a follower actuated by a camshaft lobe. That has been identified as a source of noise on some Hyundai engines. Go to 12:20 and watch to about 14:30 on this video.
Also, look at this video starting at 2:20. It gives you a good look at a bad cam follower.
. I also saw another video where the pump failed, allowing gas to get into the crankcase and destroyed the engine. Brilliant design.
Thanks for confirming
There's like a thousand pounds of pressure built up in there
Compared to less then a hundred on MPI injectors.
The video may not apply though
it's a 2.4, A very different design from 1.6t, and different from 2.5, 2.5t.
There's like a thousand pounds of pressure built up in there
Compared to less then a hundred on MPI injectors.
The video may not apply though
it's a 2.4, A very different design from 1.6t, and different from 2.5, 2.5t.
Pretty sure all the high pressure pumps work off the cam.
Yeah for sure!!Pretty sure all the high pressure pumps work off the cam.
But the delivery systems vary from motor to motor,
And the pump is not the same as the one in a 2.4.
Some of the same principles may apply.
The smartstream is an entirely new design/engine a different pump/ part # and price.
But something else that can cause the ping which only hybrids have is the CVVD
Is it possible the new continuously variable valve duration can be causing this ping???
The 2.5 doesn't have CVVD it's a 1.6 thing.
The cvvd camshaft has probably 100 moving parts so I wouldn't be surprised if it was the source of some noise. I do hear something that sounds like valve train noise at hard accceleration, but I am amazed at the lack of any turbo whine, intake air noise or turbo lag from this engine. It is extremely smooth and quiet at idle.You really can't tell this is a turbo when it is runing. This entire video is fascinating to me, but start at the 8:45 mark to see how the camshaft works.
Exactly!! so it may be the valve duration is hanging up and leaving the valves in a bit of an improper position causing pings and tings.The cvvd camshaft has probably 100 moving parts so I wouldn't be surprised if it was the source of some noise. I do hear something that sounds like valve train noise at hard accceleration, but I am amazed at the lack of any turbo whine, intake air noise or turbo lag from this engine. It is extremely smooth and quiet at idle.You really can't tell this is a turbo when it is runing. This entire video is fascinating to me, but start at the 8:45 mark to see how the camshaft works.
Afterall it is a brand new design just released
I suspect it is a CVVD engine design issue. In my case, it literally happened with a bang, at 6pm on Jun 20, 2021 with ~1,000 mi on the Tucson Hybrid Limited 1.6t engine. I had driven 60 miles at hiway speed and then stopped at the grocery store for 20 min. While leaving the parking lot and creeping at less than 5mph, I heard a loud bang sounding like it came from the engine compartment. It has never been right since and now experience the pinging/valve train noise at 2500-3000rpm while the ICE is under load (no prob when in EV mode). Compared it to another new identical Tucson at the dealership and experienced no such issue. Is it the new engine design? It seems innovative and complex as heck at the same time. Hyundai is simply burying their head in the sand on this one. It really feels like you're driving a super cheap vehicle, which is such a shame given how well thought out the rest of the vehicle is.
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