12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Hissing noise

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  #1  
Old 11-17-2011, 06:35 PM
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Default Hissing noise

I've noticed the last two times, pulling into my driveway, I shut it off, and when I walk around the pass. side front, I hear this hissing noise, only for a few seconds. I've checked my hoses, no coolant leaks, what could it be?? Is it my turbo maybe

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IC boots
 

Last edited by Billy D; 11-17-2011 at 06:35 PM. Reason: Automerged Doublepost
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Old 11-17-2011, 06:47 PM
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Good question, can you upload a video of it making the noise?
 
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Old 11-17-2011, 07:42 PM
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its the turbo whinding down....my truck makes it too.
 
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Old 11-17-2011, 07:49 PM
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I've never noticed it before.
 
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Old 11-18-2011, 07:57 PM
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Could be your A/C.
 
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Old 11-19-2011, 04:36 AM
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I haven't used my a/c fer a bit. Would it do it even if its not in use
 
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Old 11-19-2011, 12:05 PM
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Or slight leak in the fuel system
 
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Old 11-19-2011, 01:29 PM
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Originally Posted by Billy D
I haven't used my a/c fer a bit. Would it do it even if its not in use
It might if you've been using defrost.
 
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Old 11-21-2011, 10:15 AM
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sounds like a turbo but mine more flutters than hisses
 
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  #10  
Old 11-26-2011, 08:51 AM
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Originally Posted by daveO
It might if you've been using defrost.
What does the defrost have to do with the a/c? I'm pretty sure this is my problem
 


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