Hissing sound/Air Leak - Ford Powerstroke Diesel Forum
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  #1  
Old 10-29-2013, 02:44 AM
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Hissing sound/Air Leak

This has been a hell of a few weeks with me and this truck. I take it in for an inspection and find out that the rear pinion seal is leaking, I have a mystery oil leak on the motor (probably valve cover gaskets), and my belt is about to break. So got the belt changed and in the process was told that my turbos would need to be replaced based on the findings inside the intercooler pipe. Great!! $5500!!! While trying to decide what to do about the turbos, I take it in to get the tires rotated and am told that the tie rod end is shot! Awesome!!! Now I have this loud hissing sound that sounds like someone letting the air out of a compressor.

It is present at idle and as far as I can tell it is there throughout acceleration and cruising speeds.

There is also this rumbling type sound coming from behind the glove box when I am accelerating from a dead stop. Although this is usually more common during warm up.

I am ready to just trade it in and be done!!!

Anyways, heres the video, what yall think?

Hissing - YouTube
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Old 10-29-2013, 04:02 AM
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Check the clamp on the intercooler pipe on passenger side right in front of you with hood open.that pipe fits tight enough in the truck that the clamp can be loose enough to leak but core support won't usually let it blow all the wag off.
They probably saying the turbos are bad because of all the oil in those same intercooler pipes but that's most likely being caused by the oem ccv setup is say no worries there just do the ccv mod.good luck
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Old 10-29-2013, 04:20 AM
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When I stand in front of the truck with the hood open, the hissing sound is coming from the turbo area.

I haven't noticed that sound coming from my intercooler pipes, but I will take another look today.

Thanks!!
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Old 10-29-2013, 06:34 AM
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Can you see any soot on the firewall? As stated check all your intercooler boots to make sure they are not leaking.
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Old 10-29-2013, 06:45 AM
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I cant see any soot to speak of on the firewall.

Sorry for the dumb question, but where do I find the intercooler boot?
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Old 10-29-2013, 06:47 AM
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There will be four. One from turbo to hot side pipe, hot side to the bottom of the intercooler, cold side intercooler to pipe and cold side pipe to the intake elbow. I personally took all of mine off, cleaned them with brake cleaner to get the oil off after I did my ccv mod and then put them back on.
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Old 10-29-2013, 06:59 AM
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Would it be too much trouble to ask for some pics of them?


Sorry, it's my first diesel and am still learning!!
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Old 10-29-2013, 07:03 AM
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Here you go bud. You can see it right below my air intake tube. It says dieselsite on it. There will be four of them.
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Hissing sound/Air Leak-img_20130413_112700.jpg  
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Old 10-29-2013, 07:06 AM
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Gotcha.

Where would the other 3 be?

It sounds like it is coming from the turbo area from what I can hear.
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Old 10-29-2013, 07:21 AM
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One will be on the other end of that metal pipe. The other 2 will be on the two ends of the metal pipe on the other (hot) side of the intercooler.
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