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post #1 of 8 Old 06-03-2013, 05:14 PM Thread Starter
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Turbo Whine/Squeal

Recently got my truck back from Ford after doing a head replacement, and now it has a weird whine/squeal sound coming from under the hood. It is louder when the truck is cold and actually traveling down the road. It does not make the sound at idle. Seems like once the truck warms up, the noise becomes less noticeable. Ive checked the firewall area and dont notice any soot, so i dont think it is the up-pipe leaking. All the boots seem to be fine. Im inclined to believe its the turbo. Would the noise happen at idle if it was the turbo if i increased the rpm's while at idle?? Is there a way to rule out the turbo or pinpoint that to being the problem?? There is no loss of power or boost whatsoever! Thanks in advance!

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2005 F250 SCREW LARIAT 6.0L
ARP STUDS, GASKETS, SCT CUSTOM, AFE STAGE II
10" LIFT, 38X14X24 KUMHO MUDDERS
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W/O CATS


Last edited by usmcknight69; 06-03-2013 at 05:20 PM.
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post #2 of 8 Old 06-03-2013, 05:49 PM
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Really sounds like a boost or drive pressure leak by description.
Small reed valve sounding like noises can be difficult to find.

Last edited by cfd_shop; 06-03-2013 at 06:09 PM.
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post #3 of 8 Old 06-03-2013, 06:06 PM
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check the manifold bolts to the up pipes, they usually get loosened to wiggle stuff around under the hood, possible they werent tightened fully. Check the marman flange clamps also

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post #4 of 8 Old 06-04-2013, 07:52 AM Thread Starter
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I'll check it out when I get home. Is it safe to say that if I'm not losing boost or power that it is not the turbo?


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***MOLON LABE***

2005 F250 SCREW LARIAT 6.0L
ARP STUDS, GASKETS, SCT CUSTOM, AFE STAGE II
10" LIFT, 38X14X24 KUMHO MUDDERS
MKW WHEELS, AMP RESEARCH STEPS
4:56 F/R GEARS, 5% TINT, CLAYMORE HITCH
PHANTOM II VOLTMETER, BOOST, EGT
TRANS TEMP, 2 12" KICKER COMP SUBS,
PIONEER AVIC Z130, RECON TAILS, 3RD BRAKE &
CAB LEDS, HID 6000K HEADLIGHTS & FOGS
UPFITTERS, EXTANG REVOLUTION LO PRO, MBRP DUALS
W/O CATS

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post #5 of 8 Old 06-04-2013, 07:57 AM
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Subscribed. I started noticing this on mine after the weather warmed up, thought maybe it was just the turbo whistle. I only hear it when another vehicle passes me (going the opposite direction of course), or when driving through a place where there is an echo, if that makes sense. And only notice it at lower speeds. Weird.

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Everything else stock with the exception of what appears to be a 4" Banks exhaust from turbo back..
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post #6 of 8 Old 06-04-2013, 08:01 AM
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Curious to know the issue too!! Good Luck!


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post #7 of 8 Old 06-05-2013, 04:35 AM Thread Starter
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Haven't had a chance to look at it yet. Will let you all know when I figure it out. Thanks for the help.


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***MOLON LABE***

2005 F250 SCREW LARIAT 6.0L
ARP STUDS, GASKETS, SCT CUSTOM, AFE STAGE II
10" LIFT, 38X14X24 KUMHO MUDDERS
MKW WHEELS, AMP RESEARCH STEPS
4:56 F/R GEARS, 5% TINT, CLAYMORE HITCH
PHANTOM II VOLTMETER, BOOST, EGT
TRANS TEMP, 2 12" KICKER COMP SUBS,
PIONEER AVIC Z130, RECON TAILS, 3RD BRAKE &
CAB LEDS, HID 6000K HEADLIGHTS & FOGS
UPFITTERS, EXTANG REVOLUTION LO PRO, MBRP DUALS
W/O CATS

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post #8 of 8 Old 06-05-2013, 05:53 PM Thread Starter
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Pretty sure I figured it out....had a loose clamp where the CAI meets up with the turbo. Tightened it down and the noise went away.....atleast for now.

And also tightened down the clamp where the EGR gasket is.

***MOLON LABE***

2005 F250 SCREW LARIAT 6.0L
ARP STUDS, GASKETS, SCT CUSTOM, AFE STAGE II
10" LIFT, 38X14X24 KUMHO MUDDERS
MKW WHEELS, AMP RESEARCH STEPS
4:56 F/R GEARS, 5% TINT, CLAYMORE HITCH
PHANTOM II VOLTMETER, BOOST, EGT
TRANS TEMP, 2 12" KICKER COMP SUBS,
PIONEER AVIC Z130, RECON TAILS, 3RD BRAKE &
CAB LEDS, HID 6000K HEADLIGHTS & FOGS
UPFITTERS, EXTANG REVOLUTION LO PRO, MBRP DUALS
W/O CATS


Last edited by usmcknight69; 06-08-2013 at 06:38 AM.
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