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Black Substance Around Turbo Inlet

LANDSCRIBBLE

By LANDSCRIBBLE,
in Engines & Forced Induction

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Dale FZ1 Veteran

Dale FZ1

Posted
Posted

Are there traces of it in the trunking from K&N - compressor?

Give the filter a clean, don't apply excessive amounts of the filter oil.

Then give it another run after wiping out the stuff shown on the comp inlet and see what happens.

GTScotT Grand Master

GTScotT

Posted
Posted

has it ever had breather hoses connected?

How dirty is the K&N? as said above they are oil based and you wouldnt want to over lubricate them. If its dirty it could be getting passed the paper element.

is there much build up in the cooler pipes? That will give you a better indication of where its coming from.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

looks like the K&N had it's mum lubricated lol... give it a wash and use very minimal amounts of the K&N lubricant, or better yet, get a dry type air filter, I'm not a big fan of oil based air filters.

LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
  • Author
Posted

I was thinking if excess blow-by could be the cause. Compression test prior to discovering this was between 130-117psi across all 6. The BOV doesnt fully open until it see's full boost (20psi), so it flutters like its blocked off most of the time. I bought the filter brand new only 3 months or so ago, havent cleaned it yet.

LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
  • Author
Posted

Since i put this turbo on earlier this year it was just running stock turbo with pcv connected. Had recently installed a catch can, noticed there was some oil thats been sprayed around the the catch can hose joins and breather. The clamps werent loose either, the thing felt empty.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Since i put this turbo on earlier this year it was just running stock turbo with pcv connected. Had recently installed a catch can, noticed there was some oil thats been sprayed around the the catch can hose joins and breather. The clamps werent loose either, the thing felt empty.

put some steel mesh/wool into it, might collect more oil vapour

LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
  • Author
Posted

but you said there are no breather hoses or bov pipes hooked up? So it cant be from there.

Unless were all confused now?

haha sorry, correct. My knowledge of these things is still poor. Can blow-by come back out through the intake plenum, throttle body, intercooler and then turbo?
jjman Mentor

jjman

Posted
Posted

it has to be the K&N if there is no other input into the intake pipe.

unless BOV flutter can force air back past the compressor wheel? couldnt imagine it being possible n to the level of oil that is there. But i dont have flutter so not surewhat it can do...

LANDSCRIBBLE Mentor

LANDSCRIBBLE

Posted
  • Author
Posted

it has to be the K&N if there is no other input into the intake pipe.

unless BOV flutter can force air back past the compressor wheel? couldnt imagine it being possible n to the level of oil that is there. But i dont have flutter so not surewhat it can do...

These are my thoughts aswell. Ive got a cheapo dry filter i might use that again
GTSBoy Grand Master

GTSBoy

Posted
Posted

The definition of "flutter", being reversion, means intake air being forced back out through the compressor wheel against its rotation. Hence the noise. If the pipework between the turbo and the engine is oily (and there may be some from the turbo itself) then oil could go back out through the compressor.

But that stuff looks like it has only been flowing in one direction....so I'd have to guess it is filter oil, or perhaps a load of water got at the filter at some stage, washed crap out of / through the filter and carried it to the turbo.

jjman Mentor

jjman

Posted
Posted

The definition of "flutter", being reversion, means intake air being forced back out through the compressor wheel against its rotation. Hence the noise. If the pipework between the turbo and the engine is oily (and there may be some from the turbo itself) then oil could go back out through the compressor.

But that stuff looks like it has only been flowing in one direction....so I'd have to guess it is filter oil, or perhaps a load of water got at the filter at some stage, washed crap out of / through the filter and carried it to the turbo.

ah ok it is pusing right the way through the compressor wheel. I thought it was only a pressure wave bouncing back n forth between the throttle body and the outlet side of the compressor...

And yes, agreed that it looks like it is flowing in from way upstream (filter).

But to be really sure pull off the pipe from the compressor outlet. If there is heaps of oil there then turbo seals + flutter is likely. If little or no oil then can probably conclude filter oil.

Yeedogga Experienced

Yeedogga

Posted
Posted

Is it just me or is the oil 'vortex' pattern going the opposite way that the air would be sucking into the compressor wheel?

IE: the compressor wheel is spinning clockwise (and so pulling air from the 'left' of the vanes) but the oil pattern seems to be going anti-clockwise?

Or have i misunderstood basic fluid/air physics? (most likely)

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