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post #1 of 17 Old 06-01-2013, 12:16 PM Thread Starter
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turbo hiss

hello i recently am noticing a hiss that sounds like air being let out of the tire while engine is running. i can hear it in and outside the cab. my up pipes look to be in good shape and no soot showing. i smell no fumes either. it is comming from that general area though. can somthing wrong with the turbos cause this noise? i have no power loss and boost seems ok. how can i trouble shoot to find the problem?
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post #2 of 17 Old 06-01-2013, 01:03 PM
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The gasket between the two turbochargers, maybe?

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post #3 of 17 Old 06-01-2013, 06:48 PM Thread Starter
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s there a way to check for leaks in the turbo system?
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post #4 of 17 Old 06-02-2013, 09:15 AM Thread Starter
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will these leaks that cause the hissing cause any damage?
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post #5 of 17 Old 06-02-2013, 04:46 PM Thread Starter
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anyone have any ideas or know if it will cause damage?
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post #6 of 17 Old 06-02-2013, 09:56 PM
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Is the hissing sound there at all times, when truck is running.......or it only does it when its cold, then it stops as it gets worm ?

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post #7 of 17 Old 06-03-2013, 07:30 AM Thread Starter
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t is there all the time and rises with rpm. sounds like letting air out of a tire
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post #8 of 17 Old 06-03-2013, 10:06 AM Thread Starter
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k this thing is driving me crazy. if I dont see soot around the up pipe what is another way I can check to see if it is leaking? I have a mini max tunner. would my exaust back pressure change if there is a leak? I wish there was a way to run smoke through the motor and see where it comes out. any ideas?
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post #9 of 17 Old 06-03-2013, 02:01 PM
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Quote:
Originally Posted by Zacfrd View Post
k this thing is driving me crazy. if I dont see soot around the up pipe what is another way I can check to see if it is leaking? I have a mini max tunner. would my exaust back pressure change if there is a leak? I wish there was a way to run smoke through the motor and see where it comes out. any ideas?
Yeah man. That would drive anyone up a wall.
The best way to get closer to the noise is, get a stethoscope & listen to it . Hopefully that will pin point your problem. Good luck to you

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post #10 of 17 Old 06-04-2013, 09:53 AM Thread Starter
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ok used a stethoscope and could not pin point it. i did remove a wire from the exhaust that would go to egr cooler which i have removed and when the actuator on the turbo shut the hissing stops??????
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