Extra high pitched whistle
Thread Starter
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Hi!
Joined: Sep 2007
Posts: 1,268
Likes: 0
From: Central NJ
Extra high pitched whistle
I drove about two hour on Saturday from NJ to PA, about 120 miles, and about 1 hr into the trip I started to hear an extra high pitched whistle. My first though was that the intake was falling off, or there was a little gap at a clamp but when I got to where I was going and shut the truck off there was a noise like something was still spinning, and then after about 10 seconds it wound down to stop.
Is there a bearing in the turbo that can go bad?
Is there a bearing in the turbo that can go bad?
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
There is a bearing that can go bad. And if you can hear it when you shut the truck off, that's the first place I'd look. When my turbo went out, there was a lot of side to side slop in the turbo. The fins were making contact with the housing. It never leaked oil. But the sound I was hearing wasn't a high pitched whistle, but a scraping sound, and I only heard it when I was accelerating or going up a hill.
Pull the boot off the turbo and see if the shaft is loose. I know a slight movement is expected, but with mine, I could pull on the shaft and when I tried to turn it while pulling on it, I could hear and feel the resistance of the fins on the housing.
Pull the boot off the turbo and see if the shaft is loose. I know a slight movement is expected, but with mine, I could pull on the shaft and when I tried to turn it while pulling on it, I could hear and feel the resistance of the fins on the housing.
Thread Starter
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Hi!
Joined: Sep 2007
Posts: 1,268
Likes: 0
From: Central NJ
My truck just started leaking oil too, I havent looked into it yet because it is a very small amount, but if that bearing is bad could that also be the cause of my oil leak?
Looks like I will be pulling my turbo tonight. Crap.
Looks like I will be pulling my turbo tonight. Crap.
Thread Starter
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Hi!
Joined: Sep 2007
Posts: 1,268
Likes: 0
From: Central NJ
rebuild kit
Powerstroke Turbo Rebuild Kit w/ Banks Compressor Wheel GTP-38 Ford 7.3L Diesel | eBay
good deal?
Powerstroke Turbo Rebuild Kit w/ Banks Compressor Wheel GTP-38 Ford 7.3L Diesel | eBay
good deal?
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
If that bearing is leaking, it will leak either in the turbo, going into the engine, or out the exhaust. Is it the vacuum pump? Or a leak in the vacuum system? That should be easier to locate by just turning the ignition on and playing with the heater/AC controls. Hopefully it's an easy fix for you. But if it ain't, pulling the turbo on a super duty is much easier than an OBS truck!!
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Decent price if you need a wicked wheel too I suppose, I don't do too much Ebay, but i guess if they are reputable, Clay sells the kit BTW
Riffraff Diesel: Garrett GTP38 Journal Bearing Rebuild Kit
Riffraff Diesel: Garrett GTP38 Journal Bearing Rebuild Kit
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Thread Starter
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Hi!
Joined: Sep 2007
Posts: 1,268
Likes: 0
From: Central NJ
OK well I just called my local shop and OEM replacement is $950 so I think I will rebuild if I can.
What do you mean "is it the vacuum pump?" Is what the vacuum pump? Where the oil is leaking from?
What am I locating by turning the ignition on and playing with the heater/AC controls?
Sorry for my negligence.
What do you mean "is it the vacuum pump?" Is what the vacuum pump? Where the oil is leaking from?
What am I locating by turning the ignition on and playing with the heater/AC controls?
Sorry for my negligence.
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Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
The vacuum pump operates the climate controls in the cab. The vacuum pump is battery operated and is located under the hood on the passenger side. What I was suggesting is the possibility that one of the lines might be leaking. With the ignition turned on, the pump starts running. You can adjust the heater/AC controls and see if the high pitched sound comes up. If it does, then you have found your problem. This is totally separate from the turbo.
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
No. That is very likely the turbo. And, that is probably the issue, but not necessarily. I sometimes hear the turbo on my 99 when I shut it off for a few seconds. It's been that way for several months. The whistle you're hearing might be separate from the turbo. Probably not, but possible.
Thread Starter
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Hi!
Joined: Sep 2007
Posts: 1,268
Likes: 0
From: Central NJ
Thanks John, reps sent!
So I will pull off my intake tube and pull/push/spin the turbo wheel. If there is a lot of play in it I need to rebuild my turbo? So pull the turbo out because I should not be driving the truck if this is the problem, correct?
So I will pull off my intake tube and pull/push/spin the turbo wheel. If there is a lot of play in it I need to rebuild my turbo? So pull the turbo out because I should not be driving the truck if this is the problem, correct?