is this normal
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is this normal
when driving thru town at 25 mph. i notice a whooshing or like a shhhhh air noise.i noticed it a couple times in the past.as soon as i get on the throttle a little bit it goes to the turbo whistle.
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thanks i checked up-pipes no soot and i recently cleaned boots and retightened clamps but i didnit totally remove the lower ones down towards the valley.ill have to check them.i cant hear it at idle at all.
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checked clamps on lower boots and at intercooler none loose and look ok.no tears that i could see.i noticed that someone had to have the turbo off because if my searches are right stock turbo is a garret with a .84 housing.mine has a garret 1.00a housing and they have a hose clamp on the front of turbo where the intercooler tubes come off.so what kind of clamp should be on that?thanks for the help.
Post Fiend
Joined: May 2009
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From: Pea Ridge, AR
checked clamps on lower boots and at intercooler none loose and look ok.no tears that i could see.i noticed that someone had to have the turbo off because if my searches are right stock turbo is a garret with a .84 housing.mine has a garret 1.00a housing and they have a hose clamp on the front of turbo where the intercooler tubes come off.so what kind of clamp should be on that?thanks for the help.
The turbine housing is what is .84 A/R.
As for the turbo outlet clamp it should be a v band clamp. Similar to this one
Riffraff Diesel: Motorcraft Compressor Housing Outlet Clamp
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thanks for the help.im learning as i go.ill get a clamp.and maybe new boots while im at it.so this may sound stupid but the turbine housing is the part that connects to the downpipe the right?the the compressor housing is the intake and intercooler part?
Hotshot
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From: Puget Sound
Your exhaust brake might be kicking in prematurely. I call my EBPV brake a "Snake Brake" because of the hissing.
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ok so is there anything i can do to check that out?i only notice it once in a while but ill have to pay more attention now i guess.
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Post Fiend
Joined: May 2009
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From: Pea Ridge, AR
Yes Turbine is the Exhaust pipe side, the Compressor is the Intake side.
Hotshot
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From: Puget Sound
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i dont think so. no tuner.completely stock as i know of.i cleaned my ebps tube but i didnt drive it yet.would that affect it at all?when im barely on throttle to maintain the 25 mph is when i notice it.when going up a slight grade as i step on throttle it gets quieter and quieter then the turbo will start to whistle.by 30 mph its gone.
Post Fiend
Joined: May 2009
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From: Pea Ridge, AR
Another thing to consider is possibly the fan clutch? It is getting to be warmer now and when the clutch engages the fan is quite noisy.
Is the sound more of a hum or a whoosh like you were describing it. I have owned 3 7.3's and they all have some form of harmonic noise at low boost levels.
Is the sound more of a hum or a whoosh like you were describing it. I have owned 3 7.3's and they all have some form of harmonic noise at low boost levels.
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its more of a shhhh.then as you gradually accelerate it diminishes.if i had a boost lek wouldnt i hear that toying around in my driveway?my brother has a cummins(i know a whole different engine).he said his makes a sound like that and its the wastegate?hes goin by the garage though he doesnt work on anything.
Post Fiend
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From: Pea Ridge, AR
Under nearly all circumstances you will never hear the factory wastegate open on the 7.3. You could be hearing the EBPV(Exhaust Back Pressure Valve) like Tugly was referring too, you could try unplugging it at the pedestal to see if the sound goes away.
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thats the plug towards bottom of pedestal right?come to think of that it is nearly the same sound as when you take off and that thing is still closed.why didnt i think of that earlier.could have saved you guys some time. now when i unplug it should truck be turned off and cold so it remains opened?i wanted to do something with that anyway.
thanks alot
thanks alot