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#1398694 - 03/10/09 01:26 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: agpatel]
saaber1 Offline


Registered: 11/28/07
Posts: 1877
Loc: Pacnw
 Originally Posted By: agpatel
Which is what i will be doing soon :) Once a vented catch can comes out that I like


Ditto. The cans/systems that are out there aren;t that great IMO. Certainly better than nothing though.

I will probably do something like this on my own if no one comes out with a good solution. I believe the provent can has a built in regulator (not sure need to research it more) which would eliminate the need for the control valve shown below. One might possibly pick up minor horsepower gains with this system also (drag racers etc. do) but that would be just an indirect benefit. The goal is to eliminate the deposits.

_________________________
"when 5W30 is cold, ...the oil is 35 weight (5+30),...20 w 50 starts at 70 and warms up to 50"
- Kyle, auto mechanic & VP Speedline Motorsports, INTL

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#1399729 - 03/11/09 02:03 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: saaber1]
zoomzoom Offline


Registered: 08/20/03
Posts: 799
Loc: Washington, DC
This is what I did to my S4


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#1399848 - 03/11/09 03:59 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: zoomzoom]
hustler Offline


Registered: 10/04/08
Posts: 81
Loc: Dallas
I wonder if this is extra-severe in the turbo engines. It sounds like an excellent justification for water injection on those engines. Do these engines get "good tuning" in factory form, or do they run super-fat? I know the mazdaspeed miata likes to run fatter than an lc-1 wideband reads (10.0:1).
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#1399911 - 03/11/09 05:00 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: hustler]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
Would the engine run or not throw a code vented to the atmosphere?
_________________________
Why do people post I want the best for my car,,, When there isn't anything that is the best on the car to begin with.

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#1400010 - 03/11/09 06:42 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: Steve S]
agpatel Offline


Registered: 06/04/07
Posts: 57
Loc: Raleigh, NC
As long as you do not have any air that is not metered by the mass air flow you will be fine. Just have to block off the rear PCV where it goes to the intake. Just have to make sure you have no vac leak and you will not throw a code.

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#1400050 - 03/11/09 07:26 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: zoomzoom]
saaber1 Offline


Registered: 11/28/07
Posts: 1877
Loc: Pacnw
 Originally Posted By: zoomzoom
This is what I did to my S4


Is there oil etc. in the engine compartment from the "vent"? or are you using a catch can or some other way to keep gunk out of the engine compartment?
_________________________
"when 5W30 is cold, ...the oil is 35 weight (5+30),...20 w 50 starts at 70 and warms up to 50"
- Kyle, auto mechanic & VP Speedline Motorsports, INTL

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#1400445 - 03/12/09 08:16 AM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: saaber1]
zoomzoom Offline


Registered: 08/20/03
Posts: 799
Loc: Washington, DC
 Originally Posted By: saaber1
 Originally Posted By: zoomzoom
This is what I did to my S4


Is there oil etc. in the engine compartment from the "vent"? or are you using a catch can or some other way to keep gunk out of the engine compartment?


I just got about 4ft of coolant hose and ran it back by the tranny and down, so it vents out under the car and onto road..funny thing I didn't notice any dripping when the car is parked..not sure how it looks like when I am under full boost

no funny smell in cabin or oil mess in the engine compartment

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#1400513 - 03/12/09 09:49 AM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: zoomzoom]
saaber1 Offline


Registered: 11/28/07
Posts: 1877
Loc: Pacnw
Sounds simple, low tech, and effective. Same as the "road tubes" used by pre emissions U.S. cars (long live the highway "grease strips" in the middle of the highway lanes ha ha).

Some people are using a "slashcut" system and running it into the exhaust which has the benefit of "pulling" vapors out of the crankcase due to the vacuum created. Here is one "slashcut" product f.e. http://www.moroso.com/catalog/categorydisplay.asp?CatCode=13023

This is the best post I have seen in evaluating different crankcase evacuation techniques:

http://www.honda-tech.com/showthread.php?t=1199935

Also, a diagram from Moroso's instruction sheet:

_________________________
"when 5W30 is cold, ...the oil is 35 weight (5+30),...20 w 50 starts at 70 and warms up to 50"
- Kyle, auto mechanic & VP Speedline Motorsports, INTL

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#1412473 - 03/23/09 06:15 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: saaber1]
RI_RS4 Offline


Registered: 07/18/06
Posts: 1175
Loc: Rhode Island
here's another example of an engine in the UK, with 19000 total miles, and dealer service done with those superior European oils (most likely Castrol Edge).




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#1412623 - 03/23/09 08:09 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: RI_RS4]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
So that is a whole lot of blowby.
_________________________
Why do people post I want the best for my car,,, When there isn't anything that is the best on the car to begin with.

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#1413444 - 03/24/09 03:26 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: Steve S]
zoomzoom Offline


Registered: 08/20/03
Posts: 799
Loc: Washington, DC
nasty, so it is not just US problem...

I will say it again..get rid of the PCV system and problem solved

no matter what oil is used there will always be lots of blow-by in this engine

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#1414268 - 03/25/09 09:54 AM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: zoomzoom]
SR71 Offline


Registered: 03/25/09
Posts: 4
Loc: UK
RI_RS4,

The car you refer to was running Titan Fuchs Longlife GT1 5w-30.

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#1414542 - 03/25/09 02:07 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: zoomzoom]
d00df00d Offline


Registered: 10/20/05
Posts: 8799
Loc: PA
 Originally Posted By: zoomzoom
I will say it again..get rid of the PCV system and problem solved

They can't vent to atmo for emissions reasons.
_________________________
2011 Mazda RX-8 R3
Castrol GTX 5w-20

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#1414721 - 03/25/09 04:42 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: d00df00d]
rhouse181 Offline


Registered: 03/07/09
Posts: 22
Loc: Houston, TX
sweet jesus... that thing must eat oil like crazy! the more i see and read, the more i know a catch can is necessary... i doubt an emissions inspection place would even notice a stealthy catch can under the hood

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#1415783 - 03/26/09 04:09 PM Re: FSI Engines - Audi RS4 Engine Oil-Related Deposits [Re: SR71]
RI_RS4 Offline


Registered: 07/18/06
Posts: 1175
Loc: Rhode Island
 Originally Posted By: SR71
RI_RS4,

The car you refer to was running Titan Fuchs Longlife GT1 5w-30.


Seems like an appropriate name! So much for Fuchs. I suspect it's letting quite a bit of fuel pass through the rings.

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