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Odd Whirring/Grinding/Electrical Sound from Engine after turning off - 2019 Limited 2.0l Turbo - 50k miles

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16K views 22 replies 13 participants last post by  72dodgecoronet  
#1 ·
Hey everyone,


This issue has been going on for a bit, I've taken my vehicle to the dealership twice and to an independent mechanic and no one has been able to ascertain the issue at hand - as it seems the car only wants to get temperamental when no one is able to assess it.

The issue begins while driving, originally it happened after long drives, but now it is happening even after 10 minute city driving. The sound starts low and gradually gets louder and will continue for long after the car has been turned off. I am stumped as to the cause of this, and would like to know if anyone has experienced this or even knows what this could be. In the video, I have the camera pointed up to the hood as I was trying to locate the sound. I still can't tell exactly where it is coming from.

Thank you very much!
 
#3 ·
It's normal. The 2.0L Turbo has an electric pump that circulates coolant through the engine block and intercooler for a bit after the car shuts down.

Edit: What might not be normal is if it recently got a lot louder. What the video says to me is it's probably the circulation pump going kaput.
 
#5 ·
Thank you guys very much for that. I still have the car in the dealership and they are scratching their heads; should I just recommend them to check out the Circulation Pump then? Car's still under Powertrain warranty and I'm fairly certain this falls under that category.
 
#6 ·
That should be easy to fine with as loud and consistent. Use a long screw driver as a stethoscope if you don't have one. You don't happen to have a coolant leak do you? Maybe something dropping on an exhaust manifold.
 
#7 ·
Not sure if you have found it or not yet, but check the auxiliary water pump. I noticed mine the other day when I went to change the oil. Mine is very quiet, but it does run several minutes after the engine is turned off to keep the oil in the turbo from baking. That was the first time I have noticed it, and it was only because I literally had my head under the front bumper. If its starting to go out, it could make a very similar sound.
 
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#8 ·
I second this! After months of hearing the noise I ended up finding out that the whining noise I had was my Auxiliary Pump which as on the driver side if you take off the bottom engine cover. Drove me nuts so just this week I ordered another Auxiliary pump, I think the original is working OK but I don't think it should be whining so much.

As for the owner post, it sounds like a scratching noise which is not similar to the whining noise I have heard, but it may be the case that the pump is in a worse state? Get a small piece of wood and if it vibrates to the sound, you got the part with the problem!
 
#18 ·
Same issue on my 2019 TH elite 2.0 l turbo.

But delaership said its not covered under 5 yr powertrain warranty. Not sure if the warrantry terms are different in the states compared to Canada.
 
#19 ·
I've got two dealers telling me that the (newly) noisy Auxiliary Water/Coolant Pump is normal and per spec. Sometimes it runs for as long as ten minutes after shutting the engine down. I'm feeling like just replacing it but have a question. My pump seems to be directly tied to engine RPM. It's not a direct relationship but for example, when coming off a traffic light, the pump increases RPM (and noise) to a higher pitch level, and then once idling up to a traffic light, it falls to the same RPM (and noise) that it maintains after turning the engine off. Is the pump motor typically a variable-speed unit?
 
#21 · (Edited)
Sometimes it runs for as long as ten minutes after shutting the engine down. I'm feeling like just replacing it but have a question. My pump seems to be directly tied to engine RPM. It's not a direct relationship but for example, when coming off a traffic light, the pump increases RPM (and noise) to a higher pitch level, and then once idling up to a traffic light, it falls to the same RPM (and noise) that it maintains after turning the engine off. Is the pump motor typically a variable-speed unit?
The electric "auxiliary water pump" found only on a 2.0T engine should only run after you shut the car off, so if it's running while the engine is running, that's a problem. The actual mechanical water pump is what circulates the coolant when the car is running. The only purpose for the auxiliary pump on a turbo engine, is to continue to cool the turbo and intercooler after shutdown. It's always a good idea to let any turbo engine "idle down" for a minute, after you park, before shutting off the car, and the auxiliary pump won't have to work as hard...🤔😉😎