RS4 : to prevent carbon build up, i think this product will work.

[micky]

https://www.grimmspeed.com/catalog/p...41tbqn841dio60

click picture to see how it works.

it works for subaru car.

i have talked Mike at grimmspeed

but he has to get a RS4 in his shop to check if it will fit to RS4 or not.

who lives in Minneapolis, MN??

[FWP!]

What about just a meth setup?

[Hotazlava32]

Damn that thing is ugly

[Tekk]

What about just a meth setup?

I would assume this setup is cheaper than a full meth injection kit. Also I think people are more likely to spring for this since its a simple 'plug some tubes in and go' setup where-as meth-injection requires more technical prowess in installing.

Damn that thing is ugly

Its not winning any beauty awards for sure but it does LOOK nicely constructed. I'd say its just about as big an eyesore as a catch-can would be.

The biggest problem Im seeing so far is this APPEARS to be a direct replacement for the oil filler cap. Not sure if its design would port over to the RS4 system and work without a hitch.

I always like new ideas though!

On a side note: Has that one guy who installed water/meth injection on his RS4 checked out his valves in a while? I'd be willing to get in on a water injection or something if it cleaned out my intake track continuously.

[elf_cruiser]

or better yet, just vent the valve covers to the atmosphere and plug up the PCV inlet... problem solved...

[Tekk]

or better yet, just vent the valve covers to the atmosphere and plug up the PCV inlet... problem solved...

I think someone already tried this on RS246.com and while it decreased the build-up speed, it didn't fully cure it.

[zachf88]

So, who is going to try this out? I wish I lived near Minneapolis....

[RBSileighty]

Isn't that basically just a oil catch can? ...tons of those exist on the market... lots of shapes/looks etc

Quick Google Search

[micky]

or better yet, just vent the valve covers to the atmosphere and plug up the PCV inlet... problem solved...

i tried it and then idle went unstable.

[micky]

Isn't that basically just a oil catch can? ...tons of those exist on the market... lots of shapes/looks etc

Quick Google Search

catch can need empty & size is big, grimmspeed's is small & no need empty. see that link & images. also i tried catch can but there is not enough space under hood.

[elf_cruiser]

i tried it and then idle went unstable.

You sure you got an air tight plug on the PCV inlet? I did this to my S5 several weeks ago - runs awesome every day. To the guy who says it wouldn't fully cure the problem, please explain to me where the other source of oil vapor is, that will get into the intake manifold???

[micky]

You sure you got an air tight plug on the PCV inlet? I did this to my S5 several weeks ago - runs awesome every day. To the guy who says it wouldn't fully cure the problem, please explain to me where the other source of oil vapor is, that will get into the intake manifold???

please explain how to vent to ATM with above pic.

my test was, pull out breather pipes from head and plug pipe's end. then two head holes vent to ATM. and finally idle went unstable with warning.

(breather pipes connected to oem oil separator and oil separator connected to intake.)

[elf_cruiser]

That's basically correct - however, it is easier and makes a lot more sense to plug the inlet to the oil separator. Use a rubber expandable plug similar to this:
This is what I used on the S5, so I'm assuming it's a simliar style hose and oil separator...???

Then get some short radiator hose pieces to clamp onto the "head" hole (actually the valve cover) and attach PCV filters to keep dirt out of the engine...

[elf_cruiser]

here's a pic of what it looks like on my S5, plug installed...

[Tekk]

You sure you got an air tight plug on the PCV inlet? I did this to my S5 several weeks ago - runs awesome every day. To the guy who says it wouldn't fully cure the problem, please explain to me where the other source of oil vapor is, that will get into the intake manifold???

Its buried somewhere in either RS246.com's boards or in the "Carbon Build-up Megathread" on this board. Im no engine expert so I unfortunately cant give you the answer...I just remember that option being discounted by other folks who tried it.

[elf_cruiser]

I think I've read everything on this board with "PCV" in it - if you can find it pls let me know... Not trying to start an argument, just curious if there's something I don't know about... I promise, my car runs awesome without it...

[richib86]

ive been running a catch can for 3000+ miles and its not a total cure. the catch can will collect what build up onto the inlet walls but the valves and stems themselves im now 99% sure get buildup from the valve seals

[elf_cruiser]

Ahhhhh - so buildup is also coming from the thin layer of oil that gets through the valve seals...
Makes sense... No way to fix that :(
SUCK.

[micky]

here's a pic of what it looks like on my S5, plug installed...

image link is broken. could you send me your image? [email protected]

thanks

ps: and without pcv filter, idle stable??

[R1ce]

That or from the internal EGR that allows overlap during the exhaust and intake cycle. I recall several in depth discussion about that.

Ahhhhh - so buildup is also coming from the thin layer of oil that gets through the valve seals...
Makes sense... No way to fix that :(
SUCK.

[ArthurPE]

imho this will not help, the oil is not from blow-by...
one guy completely disconnected the oem blow-by system and vented to atm after he cleaned his valves...the deposits were back after 2k miles, in full force...he reconnected it
another put a catch can on before the cyclone, got mostly water, very, very little oil, which would have been caught anyways...
I'm 100% convinced it's not blow-by, the oem system is very effective...

imo, it's valve guide seal seepage...

[ZEUSROTTY]

Or just use this

http://www.capachat.com/im/articles/...-capacitor.jpg

[Tekk]

Or just use this

http://www.capachat.com/im/articles/...-capacitor.jpg

88 MILES PER HOUR!!!!!!!!!!!!!!!!!!!!!

Back on point: ArthurPE stated it perfectly relating to my comment about venting the PCV system.

[v.mack]

It's actually very interesting that nobody, until you mentioned it, on any forum nor YT video, I've ever been or watched, has never mentioned this issue as well. It's like "Audi can't have this issue...." Of course it can!

...
imo, it's valve guide seal seepage...

Everyone talks just about catch cans. Yes,they might help but I think you nailed it. On a car with high mileage it's even more expectable. Audi doesn't make those seals with some lifetime "space technology", it's just a rubber and that detoriates over time. Admit it or not, I believe that especially high mileage cars need to get those replaced first to eliminate the source of oil getting on top of valves.

And then I'd do the same as did. I'm actually planning on doing it on my 2010 Audi A5 2.0T.


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[CrickiKaze]

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