Does the turbo still boost if blown?

[audiSUKKA]

Just hoping my 01 s4 turbo is not blown, if ur turbo is blown will it still fully boost? I hear whistling when Im driving.

[GunSupplier]

No.
















If you are driving it at full boost and all it does is make a "whistling" noise, it's NOT blown. If it was literally blown, you'd know, either by the airshow stunt-plane-quality smoke cloud behind you, or the screaming, screeching, wailing turbo under the hood.

[seanj130]

If the wheel is chewed up i dont think that it should boost past 5 psi..

http://www.dsmtalk.com/forums/showthread.php?t=213980

I am drunk, so i am not sure if that thread may help you at all :)

[GunSupplier]

I am drunk, so i am not sure if that thread may help you at all :)

What are you doing here?

Get back to the GTL'ing in the Vegan thread.

[zdriver]

mine is currently pumpinggg white smoke out the exhaust with 3 week old K04's but still makes plenty of boost.. im starting with compression/leakdown tests before i get too crazy and pull the engine.

[audiSUKKA]

I was on YouTube, searching about blown turbo and it sounds the same. But I'm still boost 20 psi. Any idea what it could be? I would appreciate any feedbacks.

[wildbill]

I am drunk, so i am not sure if that thread may help you at all :)
agreed :) but you can boost on a blown turbo....ive done it.... could be a leak youre hearing, or you could be screwed

[julex]

I was on YouTube, searching about blown turbo and it sounds the same. But I'm still boost 20 psi. Any idea what it could be? I would appreciate any feedbacks.

Your turbo is not blown YET. It is still spinning but its journal bearing is already damaged and getting worse. Your turbo wheels are no longer being held in place since the bearing is wobbly and once you step on gas they spin up and start grinding against turbo housing. This is the dentist drill sound you hear.

Once you grind enough material off to allow the bearing to go off axis more than certain threshold amount, the seals crack and you start pumping oil at several bars of pressure into your hot exhaust and the smoke screen effect gives you last final clue that the turbo is really a toast.

[audiSUKKA]

Thanks guys.

[shorterthanrich]

Your turbo is not blown YET. It is still spinning but its journal bearing is already damaged and getting worse. Your turbo wheels are no longer being held in place since the bearing is wobbly and once you step on gas they spin up and start grinding against turbo housing. This is the dentist drill sound you hear.

Once you grind enough material off to allow the bearing to go off axis more than certain threshold amount, the seals crack and you start pumping oil at several bars of pressure into your hot exhaust and the smoke screen effect gives you last final clue that the turbo is really a toast.

This is such a depressing post.

[SOFME]

... or you could be screwed

bwahahahahhaaha

[DxC]

This is such a depressing post.

haha it really is, but its true- thats what happens. when u see the brass bearing, it really is amazing that journal bearings are just a hole that slowly loses its tolerance

[WikiWiki]

time to buy 3071s

[julex]

haha it really is, but its true- thats what happens. when u see the brass bearing, it really is amazing that journal bearings are just a hole that slowly loses its tolerance

He he. I can give OP a hug with that post

[Das General]

I had a blown K04 and was still making 18psi. You could hear the turbo lady screamin.

[s4nicetry]

I also have a 2000 tdi and the turbo is blown yet still holds boost. Upon removal there is lots of axial play in the turbos shaft yet radially there is not much movement at all. So it holds boost for the time being but the seal(s) is toast and dumping large amounts of oil into the intake.

[The_Jerbel]

It really just depends on what kind of "blown" we're talking about here. Are we talking about blown seals, causing smoking, or a blown compressor wheel? If the impeller/compressor wheels or shaft are blown, then you'll make no boost. If the seals are leaking or have excess tolerances and the car smokes like a banshee, then it can still make boost, but the turbo is on its way out very quickly.

[Yankeefan7592]

post a vid of the noise you are hearing from inside and outside your car