Black oil before and after my vortech?
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Black oil before and after my vortech? I removed the air ducts of my vortech and saw some oil drops in the inlet + outlet of the blower.
Not too much, but the oil was dark!
I run the blower a couple of days without belt and the oiling system still connected, can this be the cause? Just a little oil leaking through the bearings / seals?
The PCV systems works well (+ checkvalve), ther's no overpressure in the crankcase and no oil going back in the blower inlet.
No particular noises, oil level in the engine is constant...
Am I worrying for nothing?
Not too much, but the oil was dark!
I run the blower a couple of days without belt and the oiling system still connected, can this be the cause? Just a little oil leaking through the bearings / seals?
The PCV systems works well (+ checkvalve), ther's no overpressure in the crankcase and no oil going back in the blower inlet.
No particular noises, oil level in the engine is constant...
Am I worrying for nothing?
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It's stock and looks like the attached picture.
Between the passanger valve cover and the PCV valve I have a spring loaded check valve (opens at very low pressure) and a catch can.
Something wrong with it?
Between the passanger valve cover and the PCV valve I have a spring loaded check valve (opens at very low pressure) and a catch can.
Something wrong with it?
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From: Centrifugal City
I think you want to cap it so it isn't pressurized under boost and relocate it forward of the Supercharger, ideally behind the MAF. Or run it to a crankcase breather.
This would keep excess oil out of the throttle body, but not sure how it's reaching the filter.
This would keep excess oil out of the throttle body, but not sure how it's reaching the filter.
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OK look at this picture: it's easier for me to draw it than to describe it 
This is how vortech handles the PCV system.
This of the breather is a good idea IF the oil is coming back from the valvecover to the blower inlet...
If not?
This is how vortech handles the PCV system.
This of the breather is a good idea IF the oil is coming back from the valvecover to the blower inlet...
If not?
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From: Centrifugal City
Looks ok. Not sure where your oil may be coming from.
Do you have a blow off valve?
Wait...
Positive crankcase pressure would blow some fumes/oil out the fresh air breather. To avoid this you could run the line to a crank breather instead. Would be unmetered MAF air, but would eliminate the oil in there. Normally the fresh air nub sucks in fresh air, but sometimes it blows out oil also (when under WOT/Boost I believe.)
Many of us run crankcase breathers without much unmetered air problems or idle issues. If you are ok with the small amount of oil, I'd leave it. Either way is ok.
Do you have a blow off valve?
Wait...
Positive crankcase pressure would blow some fumes/oil out the fresh air breather. To avoid this you could run the line to a crank breather instead. Would be unmetered MAF air, but would eliminate the oil in there. Normally the fresh air nub sucks in fresh air, but sometimes it blows out oil also (when under WOT/Boost I believe.)
Many of us run crankcase breathers without much unmetered air problems or idle issues. If you are ok with the small amount of oil, I'd leave it. Either way is ok.
Last edited by MelloYellow; Dec 2, 2004 at 12:41 AM.
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I checked the line between the valvecover and the duct between MAF and blower inlet... there's oil in there! Same black oil as I saw in the blower.
Right now the blower is disconnected and the ducting out: no oil at all
I think my checkvalve is fine, but maybe there is too much vacuum between the blower and the stock (paper) filter - this is the standard Vortech setup and may be the cause of the oil return.
You've reason: with a breather there will be unmetered air... let me try and see what happens. I can also install a little catch can in that line and see how much oil it is. Also install another less restricting filter (my old FIPK is sitting in the garage )
I'll let you know (in spring time)
Thanks for your help
Stefano
Right now the blower is disconnected and the ducting out: no oil at all
I think my checkvalve is fine, but maybe there is too much vacuum between the blower and the stock (paper) filter - this is the standard Vortech setup and may be the cause of the oil return.
You've reason: with a breather there will be unmetered air... let me try and see what happens. I can also install a little catch can in that line and see how much oil it is. Also install another less restricting filter (my old FIPK is sitting in the garage
)I'll let you know (in spring time)
Thanks for your help
Stefano
