Developed a new engine noise, driving at 40 to 50 mph and step on the accelerator so the motor pulls ever so lightly the motor makes what sounds exactly the same as a gas engine when it is pinging. Did not know a diesel engine could ping? Or is this thing ready to blow?? Any input would be greatly appreciated.
After enduring all the smart alak comments you really got only questions rather than answers. Sad.
Hard to write about a sound you hear. A short audio might help. Since it's noticeable to you in a small speed range and under light acceleration, I would suggest it's nothing special. Might even be as simple as a road vibration from something in the drive train?
When I bought my first BMW motorcycle in 1974 the salesman drummed it in my head to ride the darn thing instead of listening to it. Remember that to this day and it sure has made living easier. Unless things stop or rap, rap, rap, ... enjoy the truck.
This has been brought up before. Under light acceleration, you hear what sounds like metal ringing. Some thought it was the turbo impeller hitting the housing, if that was the case, turbos would be disintegrating.
I think the conclusion was some form of thermal expansion of the exhaust.
It's been a while, see if some remembers the thread or finds it, they'll post a link.
In the mean time, step on the go pedal harder, it goes away.
:-D
YEP YEP YEP, I am just going to hold that pedal to the carpet, ( because you told me to) just kidding. But I think thats the solution, you gonna blow, blow and get it over with....
Other folks have mentioned hearing tapping noises from the engine compartment, some forum members said it was the HPFP causing the noise under certain driving conditions ,occasionally causing a loud ticking noise .
If its a pinging noise like I'm thinking, mine has done it since day 1. Does not always do it, but there are times when its noisier than others. Haul N Grass and Shaggn85 have both provided input on what I think could be the problem. My previous Duramax had different sounds under different driving conditions also. If its a brand new noise, I'd probably let the dealer take a look at it.
i also have this pinging sounds under load. mostly 70+km/h and more so, when the truck has been running at hwy speeds for a while.
i can faintly here it with the window up, louder when down.
mines been doing it for the last 8000-10000km
or so. pretty much since winter lost its cold grip...if that has anything to do with it??
no change in performance or reading.
also seem to come from the from half of the vehical, driver side.
Curious because I used a gps with the "top speed" log that showed how fast it actually went. Did that test twice but unfortunately, never pictured that. Do it and then check a gps log to see what the top speed was. Then take that picture and post it here.
I have posted several times about this issue. My 2016 truck now has 18,000 miles on it. The noise started at about 1,500 miles, and has not changed since. From all those miles I have learned a few things about this noise:
- The hotter the truck and ambient temperature, the more the pinging noise can be heard.
- For me it happens mostly at around 2K RPM going about 50+ MPH.
- The noise is more prevalent when under load, i.e. pulling a trailer and going up a hill. But if the hill is steep, and the RPM increases due to a down shift, the noise becomes less noticeable.
- The noise is more prevalent at sea level, and is less noticeable at higher elevations. I live in San Diego, and last summer I went camping for several weeks in 8,000 ft and above campgrounds. I thought maybe the noise stopped because I didn't hear it while camping. But as soon as I headed home and reached lower elevations, the noise returned. Does this imply it's related to the turbo?
- The fuel type makes no difference. I've used all kinds of diesel including Propel, makes no difference (in respect to the noise).
- Aside from a minor CEL at 500 miles, my truck has been trouble-free (except for this noise).
So far the noise has been annoying but nothing more. I demonstrated it to the local dealer service tech, and he dismissed it as "normal diesel noise." Except to me it's anything but normal. But at least I have it documented that I had the noise while under warranty. Since nothing bad has happened, I turn up the radio when I hear the noise. Seems to work, but at the same time I'd sure love to get it fixed.
Too much paranoia over here IMO. I like Capt's suggestion of posting a video/audio clip which may help some of the calibrated or qualified ears on this forum help diagnose.
Here's a recording of the noise. It's not easy to hear; I just stuck my iPhone out the window. It's more noticeable from the middle of the clip to the end. Sounds like a pinging or jingling noise: Pinging noise
Hmmmm. I do hear a bit of a whistling noise but no "ping". My truck makes the same whistling noise under load and has done so from day one. That sound never changed between the stock tune, Celtic and as of yesterday GDE.
Ping may not be the best way to describe the noise. Others (and myself) have described it as sounding similar to a "dragging chains" noise. When I first heard the noise, I was pulling a trailer, and thought one of the trailer safety chains was dragging. I checked, and all was fine, except the noise persisted even when the trailer was unhooked.
Thanks. That kind of like a high pitch rattling. does not sound like a deep knocking or banging problem. Used to have a rocker arm that moved around on one of my BMW motorcycles under different loads or strains. Come and go, come and go - drove me nuts.
That's why I am like this today. I have no solution for you or warnings of any dire problem. One of those things.
What you folks are describing could be exhaust rattling internal in exhaust system it self ( very common)or external, check for exhaust leaks,you'll see soot stains .
I've heard that suggestion from others as well. I have looked under the hood many times, and found nothing unusual. I have looked for any loose components and found none. The dealer won't touch it because, to them, it's "normal diesel noise." Except (to me) it's anything but normal.
I have had loose baffles in mufflers drive me crazy, they'll rattle and knock and make pinging sounds,and the noise will be in rhythm with the acceleration .
Unfortunately you'll have to isolate the sound on your own , If your determined enough you'll figure it out , Get someone to ride in the bed of the truck and get their opinion which direction the noise is coming from .
Noise can be a lot like trying to find a water leak ,you think it's hear ,but it's traveling from somewhere else.
I had an issue with my 3500 and wind noise,no one else could hear it ,but me ,drove me crazy . Finally I had a bad crosswind and it was loud, I got really aggravated, Started removing clearance lights,second one over on top of drivers seat,factory didn't install one of screw mounts .
This was after taping all the door seams ,window seams, mirror seams , It was a high pitch whistle,like a dog whistle ,right over my head .
I don't have a GDE turn, and I doubt your GDE tune caused the noise. Maybe the tune causes the engine to run hotter, so you notice the noise more? Or after you put the tune in, you tested the engine a lot, and during the testing you then noticed the noise. Regardless, in some ways I'm glad it's not unique to my truck! I remember a previous post where someone took their truck to the dealer for this noise, and the service department was ready to tear the turbo apart to look for the source of the noise until a FCA tech said they wouldn't cover the work because the noise is "normal diesel noise." Well maybe it is normal for the Ecodiesel, or maybe it's just a way to avoid doing something about it. I just hope someday someone discovers the source and the fix.
Agreed. The turbo bearing is the only thing I can figure - if its coming apart it could allow the rotors to contact the housings making that type of noise, but I would expect it to happen at most speeds if that were true.
I think I'll just look around for some powerful fuel cleaners to see if I can attribute it to deposits. I dont use the best looking diesel and always go to the same place so who knows maybe its the fuel.
You are definitely saving me some time though, because if you dont have a tune, I wont bother taking mine out!
The turbo bearing is the only thing I can figure - if its coming apart it could allow the rotors to contact the housings making that type of noise, but I would expect it to happen at most speeds if that were true.
It's not the turbo rotors touching the housing. When that happens, turbos come apart instantly. That rotor assembly is spinning in the 10s of thousands upwards of 120K + in rpms.
I... am not sure on that but I will take your word for it Crash. My familiarity with gas turbines holds that most small centrifugal designs can endure minor rub, but even if it were, there really isnt anything to be done for that. Either it blows up the turbo or it doesnt.
Hopefully like I said above, there is some amount of cleaning that might allow the ping to go away.
Looks like (or sounds like) this might be happening to other Diesel engines as well: Colorado ping noise/
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