It’s most likely what others have said about def being pumped back to the tank. Our big rigs at work do the same. It’s when you don’t hear that at shutdown that you might have a problem.
unless its pushing filtered air through the def lines to purge the fluid . . . the source of the sound is next to the air box.I highly doubt it’s the DEF purging itself if you can hear it from the top of the motor. There are no DEF lines that go anywhere near that area under the hood.
Just looked through the Diesel Supplement. Page 23 mentions DEF, but also mentions from under/rear the Jeep.I haven't received my JLURD yet, but I remember reading in the diesel supplement that there was something that would happen after shutoff and there would be some noise, and it was normal. Don't remember exactly what it says or where it was in the manual, does anyone else remember this section?
Yes, I mentioned that. Was just trying to mention what was in the diesel supplemental manual.Thank you for posting this, but . . . .
the audible sound isn't coming from the rear of the vehicle. It's coming from under the hood.
Page 23 mentions DEF, but also mentions from under/rear the Jeep.
It came with my regular owner’s manual, in the little green Jeep bag it comes in.Where did you get a diesel supplement? I dont think my 21 came with one.
I'm wondering if for 2021 they combined it. My manual periodically has sections for "diesel engine(If equipped)" and the image you posted is on page 197 in my 2021 manual.It came with my regular owner’s manual, in the little green Jeep bag it comes in.
You can also find it in pdf here:
1300 miles on mine, still buzzing.Does any of this make since? This is coming from the Gladiator forum.
“Well, I heard from the dealer today on the buzzing sound after engine shutdown. I was told there was an internal FCA bulletin about this and it’s a normal ecodiesel turbo breakin noise regarding the spooling of the turbo. They told me it should go away sometime between 500-1000 miles. Not sure I buy that, but we will see.“