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Thread: 2016 6.7 Cummins Screeching Sound (Video) Reply to Thread
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  Topic Review (Newest First)
05-22-2019 06:22 PM
Rhoades1
Quote:
Originally Posted by Don_T View Post
That sound seems to be at a less frequent rate than the engine RPM. I think it most likely is something running off the accessory belt. I would take it loose and check the idler pulley closely for looseness or roughness and if that isn't it, check each accessory for the same issues.


Thanks don_t. I will check that and see if that is what it is. [emoji106]


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05-22-2019 09:23 AM
Don_T That sound seems to be at a less frequent rate than the engine RPM. I think it most likely is something running off the accessory belt. I would take it loose and check the idler pulley closely for looseness or roughness and if that isn't it, check each accessory for the same issues.
05-22-2019 02:32 AM
Rhoades1
Quote:
Originally Posted by UTDiesel View Post
If you don't have a stethoscope, you can use a piece of 1/4"-1/2" tubing about 18" long, one end to your ear, other end poking around. When you find the source you'll hear it.


Thanks utdiesel. I will try that and see what I can find [emoji106]


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05-22-2019 02:20 AM
UTDiesel If you don't have a stethoscope, you can use a piece of 1/4"-1/2" tubing about 18" long, one end to your ear, other end poking around. When you find the source you'll hear it.
05-22-2019 01:12 AM
Rhoades1
Quote:
Originally Posted by Den52 View Post
That sounds like it might be the idler pulley, which is the top pulley on the serpentine belt system. They seem to wear and get wobble in them quite quickly. When I did the fan clutch hub conversion on my 11 when the truck had about 67,000 miles the idler had to be replaced because it was worn and loose, but it didn't sound quite like your truck does. That would be the first place I would check if it were my truck.


Thanks den52, I really appreciate the help. I will check it and let you know if that is it. [emoji106]


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05-22-2019 12:16 AM
Den52 That sounds like it might be the idler pulley, which is the top pulley on the serpentine belt system. They seem to wear and get wobble in them quite quickly. When I did the fan clutch hub conversion on my 11 when the truck had about 67,000 miles the idler had to be replaced because it was worn and loose, but it didn't sound quite like your truck does. That would be the first place I would check if it were my truck.
05-21-2019 11:15 PM
Rhoades1
Quote:
Originally Posted by 17Ram2500 View Post
Ouch. Doesn't sound good. Water pump? Honestly a noise like that should be easy to diagnose it's source with a mechanics stethoscope.


Thanks for the reply 17Ram2500. The water pump was replaced under the recall and it still makes that sound. =/


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05-21-2019 11:06 PM
Rhoades1
Quote:
Originally Posted by ar_mcadams View Post
maybe its the belt tensioner


Thanks ar_mcadams, I will research it


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05-21-2019 09:30 PM
17Ram2500 Ouch. Doesn't sound good. Water pump? Honestly a noise like that should be easy to diagnose it's source with a mechanics stethoscope.
05-21-2019 04:30 PM
ar_mcadams maybe its the belt tensioner
05-21-2019 02:21 PM
Rhoades1 Hi Walker111, thanks for the reply! The dealership says they don't hear anything off about the way it sounds. When you hear the video there is clearly something off about the way it sounds. I added a link so you can play the videos. If that doesn't work I will try adding a youtube video. Thanks again for all the help!

Link To Video - https://drive.google.com/open?id=1Uu...sd2zc9tTU_UIfP
05-21-2019 09:55 AM
Walker111 For some reason I cant play the video. Truck should be under warranty...let the dealer fix it.
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