Loud howling noise
Thread Starter
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Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
Loud howling noise
Hey guys I am a long time 6.0 guy and that's what I still drive. I am working at the fire house today and one of the guys just picked up a 6.4 from out west, the claim they put a rebuilt motor in it. Well when you start it I has a loud high pitched noise that you can hear in the video. It doesn't change with Rpm. I went through the turbo and connections and couldn't find anything. Also when I opened the small cap on the top side oil cooler it was empty should that have coolant up to the sight glass?
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
U got to get in there with a good ear and get close. Could be a cac boot loose or an up pipe. How does the boost gauge look>?
Has the cap on the degass bottle ever been replaced? If not go to Ford and get a new one that is a common problem for everything in more ways than one....20 bucks tops (the originals leaked down and held zero pressure. (could be your whistle.
Is the degass bottle at the full mark? Cold
The sight-glass sitting next to the brake M/C is a fuel cooler.
My truck is always below the glass.
Anything on the ground after overnighting.
Radiator hoses on these tend to leak from the orig single O ring. Upgrade to 249.00 hoses with double orings from Rudys performance parts. They're on ebay and high quality.
If it's a constant whistle without reference to rpm, there is a leak/intake constant and that should surface in loss of antifreeze/loss of boost/or the ac and hub system.
Check your intake from the air cleaner and make sure that's clean and buttoned up correctly.
Denny (just ideas)
Has the cap on the degass bottle ever been replaced? If not go to Ford and get a new one that is a common problem for everything in more ways than one....20 bucks tops (the originals leaked down and held zero pressure. (could be your whistle.
Is the degass bottle at the full mark? Cold
The sight-glass sitting next to the brake M/C is a fuel cooler.
My truck is always below the glass.
Anything on the ground after overnighting.
Radiator hoses on these tend to leak from the orig single O ring. Upgrade to 249.00 hoses with double orings from Rudys performance parts. They're on ebay and high quality.
If it's a constant whistle without reference to rpm, there is a leak/intake constant and that should surface in loss of antifreeze/loss of boost/or the ac and hub system.
Check your intake from the air cleaner and make sure that's clean and buttoned up correctly.
Denny (just ideas)
Thread Starter
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Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
Ok pulled everything off intake wise and turbo no leaks after letting it run for 10 or 15 min the sound stops immediately and returns almost like a pump of some sort I will tell him to replace the cap
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Can you hear it with just KOEO or does it have to be running ??
Just to eliminate vac pump, unplug it. See what you see. Vac pump will run for that period without a good system and kick back in as needed.
Denny
Just to eliminate vac pump, unplug it. See what you see. Vac pump will run for that period without a good system and kick back in as needed.
Denny
Thread Starter
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Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
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Junior User
Joined: Sep 2007
Posts: 56
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Did you find a solution to this noise? By your description, this seems very similar to the noise from my truck. I have not been able to pinpoint it yet.
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Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Just an afterthought,
The squeal could be an airbound fuel cooler pump. You said the res was near empty in your first post.
Firefighter had that happen to him on a trip and there is a specific method to bleed it. His was also a high pitched squeal.
You can youtube the process. I'll try and dig up Seths post and send it your way. I know he checks in once in a while, hopefully he'll see this.
Denny
The squeal could be an airbound fuel cooler pump. You said the res was near empty in your first post.
Firefighter had that happen to him on a trip and there is a specific method to bleed it. His was also a high pitched squeal.
You can youtube the process. I'll try and dig up Seths post and send it your way. I know he checks in once in a while, hopefully he'll see this.
Denny
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Found the thread!
I should start a new thread as this is a very hard find and a great write up from Seth/Fritz. (Firefighter1406) Member. (SpeakerFritz) Commandant of 6.4 FTE.
https://www.ford-trucks.com/forums/1...r-flush-2.html
Denny
Not sure if this is what your dealing with, but if your cooler is dry of coolant, it could very well be the noise your both hearing.
Worth a share anyway!
I should start a new thread as this is a very hard find and a great write up from Seth/Fritz. (Firefighter1406) Member. (SpeakerFritz) Commandant of 6.4 FTE.
https://www.ford-trucks.com/forums/1...r-flush-2.html
Denny
Not sure if this is what your dealing with, but if your cooler is dry of coolant, it could very well be the noise your both hearing.
Worth a share anyway!
Cargo Master
Joined: Nov 2005
Posts: 2,766
Likes: 56
From: East Tawas, MI
Caution: Don't forget to check Coppers idea and make sure you examine the up pipes closely for cracks/soot. If it only does it while it's running, it's whistling while it works and that could be a fire issue.
Denny
Denny
Lead Driver
Joined: Mar 2004
Posts: 5,372
Likes: 108
From: Northern Indiana
Found the thread!
I should start a new thread as this is a very hard find and a great write up from Seth/Fritz. (Firefighter1406) Member. (SpeakerFritz) Commandant of 6.4 FTE.
https://www.ford-trucks.com/forums/1...r-flush-2.html
Denny
Not sure if this is what your dealing with, but if your cooler is dry of coolant, it could very well be the noise your both hearing.
Worth a share anyway!
I should start a new thread as this is a very hard find and a great write up from Seth/Fritz. (Firefighter1406) Member. (SpeakerFritz) Commandant of 6.4 FTE.
https://www.ford-trucks.com/forums/1...r-flush-2.html
Denny
Not sure if this is what your dealing with, but if your cooler is dry of coolant, it could very well be the noise your both hearing.
Worth a share anyway!
Man Denny you just made me have a nightmare again.
Junior User
Joined: Sep 2007
Posts: 56
Likes: 1
Thanks for the help!
This is exactly the issue. Hit a deer with the truck so the body shop had to replace the cooler. Thought it was all good, but didn't realize that it drained the pump and started making noise. They refilled and primed the system and the noise went away.
This is exactly the issue. Hit a deer with the truck so the body shop had to replace the cooler. Thought it was all good, but didn't realize that it drained the pump and started making noise. They refilled and primed the system and the noise went away.
Lead Driver
Joined: Mar 2004
Posts: 5,372
Likes: 108
From: Northern Indiana
Thanks for the help!
This is exactly the issue. Hit a deer with the truck so the body shop had to replace the cooler. Thought it was all good, but didn't realize that it drained the pump and started making noise. They refilled and primed the system and the noise went away.
This is exactly the issue. Hit a deer with the truck so the body shop had to replace the cooler. Thought it was all good, but didn't realize that it drained the pump and started making noise. They refilled and primed the system and the noise went away.