Sound from dashboard area
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Cross-Country
Joined: Jun 2021
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Sound from dashboard area
I've included a video below. This is not the best video but I've had difficulty capturing this noise. Unfortunately it might be easier to hear the noise with headphones on. The noise becomes more prominent around 16-17 seconds in. Though its in and out throughout the video. While I rev in the video and the noise does follow it there slightly, it happens fairly independent of revving.
It's a higher pitch....not quite whine? Not a squeal? It doesn't sound at all like a belt. It sounds like nothing I'm familiar with.
Let me know if you can make it out and if you have any ideas what it is coming from. It's reasonably annoying and one of those things that gets you thinking a component wants to explode on you.
It's a higher pitch....not quite whine? Not a squeal? It doesn't sound at all like a belt. It sounds like nothing I'm familiar with.
Let me know if you can make it out and if you have any ideas what it is coming from. It's reasonably annoying and one of those things that gets you thinking a component wants to explode on you.
Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
My hearing is not the best but that sounds like a failing fan clutch. Are you overheating as you use the truck? Does your fan blade turn easy by hand (engine off please). Does your fan blade seem to have slack or wobble if you wiggle it? These are some of the signs if the fan clutch is bad or heading that way. If so you want to replace it yourself ASAP and it is not hard to do. Sandy
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Cross-Country
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Fan clutch was replaced, this sound predated the swap. Cooling is fine. No overheating climbing the hills on hot days. This sound happens on a cold engine as well, as soon as you start it up it starts intermittently sounding.
Additionally, if I have the hood open with the truck running, I don't hear it up front over the sound of the engine, only in the cab, which would indicate to me its something closer to the cab.
Additionally, if I have the hood open with the truck running, I don't hear it up front over the sound of the engine, only in the cab, which would indicate to me its something closer to the cab.
Lead Driver
Joined: Oct 2016
Posts: 6,185
Likes: 633
From: Houston/Sugar Land
It could be the air pump (or anything else) Get under it with a long screwdriver or piece of pipe and put it on the pump and see if that is where it is coming from when it does it. I know you can't hear it while it is running but the pipe can. If no luck move on around the engine. Can't emphasize enough to be careful of the fan blades. Sandy
Logistics Pro
Joined: Aug 2014
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Or, could be A/C clutch coming on or off.
Maybe a pin hole in the air injection tubes, that's located between engine and firewall.
Maybe a pin hole in the air injection tubes, that's located between engine and firewall.
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Hotshot
Joined: Sep 2001
Posts: 11,958
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Is the sound coming from under the dash or under the hood? Try revving the engine the same way while checking the engine bay.
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Cross-Country
Joined: Jun 2021
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It sounds like its under the hood to me.
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Jeremy Mathews
1994.5 - 1997 7.3L Power Stroke Diesel
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Feb 20, 2021 11:51 AM