Ram 2500 6.4 engine Squealing

Hemilife1877 · Feb 28, 2019

Have a squealing sound like a pully or belt squeal for 2 months now and been to dealer 6 times under warranty.

Parts changed

1. Idler pully
2. Tentioner pully
3. Power steering pump
4. Altenator
5. Belt
6. Purge valve

Vehicle miles 10k

Upgrades so far
1.K&N CAI
2.New exaust system including 50hd flowmaster

Squealing went away for 4 days after purge valve replacment but now has started to come back on and off. Took it back for the 7th time and dealer could not get it to squeal but has now started to squeal again after the 7th visit of course! Dealer wants to let it get more consistant with squeal before we schedule another apt.

Anybody, ideas or have had this issue before and what did you figure out?

Thanks.

Punishher7 · Feb 28, 2019

I had a slight squeak the dealer fixed with a new belt. They mentioned the original belt was worn on the edge. 14k. Pretty sure I heard it again the other day and will make another appointment if it becomes consistent. I’ll be following your thread and will contribute if I get resolution.

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Hemilife1877 · Feb 28, 2019

Appreciate it, will follow up as well if anything is figured out.

zeddy · Feb 28, 2019

You got a video of the squeal? Did they change the water pump? Looks like 6.4’s I might have crappy water pumps. The water pump on my 2015 was replaced at 11k. Now my 2017 is squealing.

Hemilife1877 · Mar 1, 2019

I do have a video and no they have not changed the water pump yet the weeper hole had no leaks but of course that doesint mean anything . Link to YouTube video below

Watch "Ram 2500 squealing" on YouTube

Punishher7 · Mar 1, 2019

That is the exact sound I am getting.

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Hemilife1877 · Mar 1, 2019

Have you ever pressure sprayed your engine to clean it. Wondering if I didint get some water in somthing that the dealer has not been able to locate?

Fitz-0518 · Mar 1, 2019

Is the squeal on "all" start up and both cold and hot run conditions? Does it go away after the engine warms up?

Hemilife1877 · Mar 1, 2019

Most of the time after it warms up but then again sometimes after it warms nothing at all. Example let the truck warm up before leaving work and no sound but once I drive 20 min home and get out to open gate its squealing . It's not consistant it may squeal some days and after warm up but not other days.

It doesint squeal right at cold start up at all only after warming.

Fitz-0518 · Mar 1, 2019

OK so that would eliminate the known exhaust leak on some 2500 6.4. Really leaning toward a external rotating part. But, you have replaced all the ones that I would go after. Starting to lean toward,,,suspect the water pump. Have read here that RAM got a bad run of water pumps from their vendor. Some dealers have had to change out the pump before delivery because the squeal was so bad. Have not mentioned the electronic power steering because I have not found one post/thread saying we have a problem. Hope you get this fixed easily and that you keep us updated. Fitz

Hemilife1877 · Mar 1, 2019

Thanks for the info water pump was my next guess as well. Will post any updates I get.

Fitz-0518 · Mar 1, 2019

Really suspect the bushing in the water pump. Sounds like the bushing is seizing when the pump warms up. Quite sometimes when the pump is cold and the bushing is moving easier. lets see what others have experienced.

Hemilife1877 · Mar 1, 2019

Would you get the same sound out of the compressor pully ?

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Fitz-0518 · Mar 1, 2019

Hemilife1877 said:
Would you get the same sound out of the compressor pully ?

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I think you could. The compressor turns on a bearing though. So unless I had my "mechanical tube hearing device" on it (piece of rubber) I would suspect the bushing in the water pump. If we we lived closer I would stop by with my Mech stethoscope probe,,,and we would find that squeal.

Hemilife1877 · Mar 1, 2019

I have one of the cheap for dollar Harbor freight scopes but I've only been able to hear mostly just loud vibration sounds it would be hard to pick up that squeal it seems like .

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Hemilife1877 · Mar 1, 2019

Hemilife1877 said:
I have one of the cheap four dollar Harbor freight scopes but I've only been able to hear mostly just loud vibration sounds it would be hard to pick up that squeal it seems like .

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zeddy · Mar 1, 2019

Hemilife1877 said:
I do have a video and no they have not changed the water pump yet the weeper hole had no leaks but of course that doesint mean anything . Link to YouTube video below

Watch "Ram 2500 squealing" on YouTube

View attachment 157198

Hey!! That’s my truck. Did you come and record my truck squealing??? I’ll post up another one of mine.

Hemilife1877 · Mar 1, 2019

Man I was starting to think for a minute I was the only one with the squeal curse.

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zeddy · Mar 1, 2019

Here’s mine.

I give it a little rev, goes then comes back.

Hemilife1877 · Mar 1, 2019

Mine had that same high pitched squeal until we took off the plastic engine cover on the left side of the top of the motor is the purge valve try cupping your hand and putting it over the purge valve and see if it muffles the squeal . One we replaced that purge valve it stopped but I think I still have a pully Bearing slightly squeling on the water pump on and off or whose knows at this point after everything the dealer already replaced.

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Ram 2500 6.4 engine Squealing

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