Carbon Buildup

[A4_cabrio]

Hey guys,

I've been watching this forum:

http://www.audizine.com/forum/showthread.php?t=297492

and I can only be afraid this is an issue will hit us too.

Most likely it already does.

What's the solution here - even if you clean the valves, they will get gunked up again.

Should I change the oil from Castrol to RLI Byosin 5w-40?

I dont even know where to get this oil but that's what Google is for

[swoardrider]

If you really want to shed a tear, go check out the 2.0 engine forum over on vwvortex.com. You will find some scary pics over there.

This guy only has 28K on his motor with a catch can AND meth injection. And it still looks like shit!

[davyboi]

damn!!

[oc-drop]

sheesh that pic looks like ape fingers

.. is this something that some seafoam cannot address?

[maka]

scares the crap out of me.

[swoardrider]

sheesh that pic looks like ape fingers

.. is this something that some seafoam cannot address?

Yeah. If you want to pull the intake mani every 5k!

This is what we all have to look forward too

[AWDTURBO]

holy shit.

[Alkemix]

Those pictures remind me of those black smokers lung pictures they would show you in high school bio. BTW... what effect does having a chip have on this? I do feel like our 2.0TFSI run a little rich, since our exhaust tips are ALWAYS black, but then again, there is a 3.2 B7 in my apt garage whose exhaust tips are just as black.

[aaron1085]

so, if this is the case, Audi MUST know and plan on a vehicle running like this, so why swet it!?

[CBRmatt600]

Yeah. If you want to pull the intake mani every 5k!

This is what we all have to look forward too

Jesus Christ that looks like a 20 year old motor.

Oh well, good thing I don't plan on keeping this car past the 50k warranty.

[WayzataAudi]

i think i just shit a little.

[CBRmatt600]

Well, by sheer coincidence the Shell station is the closest fuel stop near my home, and I almost always fill up with V-Power. Hopefully that makes the difference that some claim.

[DoThisMyWay]

^Fuel is sprayed in the cylinder, that's why there carbon build-up on the valves.

[redkid's b6]

so any ideas on how to stop this mess?

[Zebman]

Surely some kind of chemical vapor we can feed into the intake, i'd hope. I knew this was going to happen with FSI but I didn't think it'd be that drastic!

[Sharkfin]

subscribed, we need to get to the bottom of this as well. I'm at 61k and plan on going until 100k

[texasboy21]

Use seafoam through the vac line on the front of the head and thats how you get it to the valves. My 03 b6 smoked out the parking lot when I went through 2 cans of it. I instantly noticed a smoother, quieter idea. I need to run some more through.

[BLACKa4QUAT]

Use seafoam through the vac line on the front of the head and thats how you get it to the valves. My 03 b6 smoked out the parking lot when I went through 2 cans of it. I instantly noticed a smoother, quieter idea. I need to run some more through.

your b6 wont have this problem since it is not a direct injection motor like the 2.0t

[yettavr6]

I still think seafoam would help, since like he said, you bring it in through the intake or a vacuum line which would get it on the valves

[A4natomical]

so any ideas on how to stop this mess?

run a catch can.

audi needs to ditch direct injection and go back to port injection.

[swoardrider]

Use seafoam through the vac line on the front of the head and thats how you get it to the valves. My 03 b6 smoked out the parking lot when I went through 2 cans of it. I instantly noticed a smoother, quieter idea. I need to run some more through.

Guys over on vwvortex are soaking their intake valves and orifice with seafoam for hours and then using pics and bottle brushes to get off most of the carbon, so I don't see how running seafoam over the valves for a minute a two is gonna do anything other than smoke out your neighbors.

[B5A4Kevin]

your b6 wont have this problem since it is not a direct injection motor like the 2.0t

BullShlt!!!!

carbon buildup is a problem for any engine.



BG Induction Service FTW. Cleans Fuel Injectors, Combustion chamber, Intake Manifold, Throttle Body, Intake Valves & Seats. all for a respectable price (most dealers charge 120-170 bucks) and it only takes an hour. dont have to take off the head, manifolds, or anything. its a 3-chemical system. one is sprayed in the intake tract (seafoam would have similar effects), one is dumped in the fuel tank for continuous cleaning after the service during the next tank of gas(similar to fuel injector cleaners @ parts stores i.e. stp/gumout). and the final chemical is ran instead of fuel, and pumped directly into the injectors (or hpfp>injectors). im not trying to advocate or advertise the product, but i do believe in it because i have had cars with so much carbon they barely start/idle and fail compression on 2 cylinders. after the service, they run better and stronger, as it shoots all the carbon out the exhaust (very smelly whitish/blue smoke, mostly burned in the catalyst & combustion chamber). anyone worried about carbon should look into a total induction service like this, especially if you are already bringing your car to the dealer for a service or something. it can also be preventative maintenance once every 2-3 years. hope this helps. peace.

[Tanner]

I really like to see a before/after of the intake valves after one of these seafoam treatments. I've been following rs246.com and a few other forums regarding to the buildup on the intake valves on the RS4 (which has the same problem as ours) and some have took out the intake valves to soak it in solvent and it didn't breakdown any of the crap on the valves, so I have my doubts with seafoam - hence I like to see the before/after photos of the intake valves.

[slimmj0k3r]

I've just decided to pull my Motor @ 20k intervals to clean the carbon buildup.

[MichiganAudiDvr]

Anyone have before and after photos with the BG Service and/or the seafoam?

[BLACKa4QUAT]

BullShlt!!!!

carbon buildup is a problem for any engine.

its worse for a direct injection motor because no fuel passes over the intake valves.. so yeah, i am incorrect in saying that he wont have the problem, but it wont be as severe as people have been seeing with the 2.0t..

[D-techniK]

It would be great to get a DIY post on this going..

[MichiganAudiDvr]

It would be great to get a DIY post on this going..

Yes! Someone post a DIY with photos on how to use the Seafoam and/or the BG system. I would have no idea what to do with either - what line to pull, etc.

[davis449]

I alternate running Lubro Moly Ventil Sauber (Valve Clean) & Jectron every time I change the oil (every 5K miles). Lubro Moly is NOT some bullshit, off-the-shelf, STP-type additive. BG 44K FTW too. I'm currently running that in HIGH concentration (7 gal. of premium gas) to clean the valves in my beater Honda. We'll see how that works out.

[Slo.Mo.Shun.]

Dam, now I to take a look at my valves >_< ...

[MichiganAudiDvr]

Dam, now I to take a look at my valves >_< ...

Good - take photos before and after - and use one of these products and post photos of the result!!

I am interested to see some real photos - not just the worst of cases.

[Zebman]

The thing about gas and oil additives is that they don't reach the valves in our FSI engines. I'm contemplating running sea-foam through the boost gauge tap on the intake manifold. This carbon has me worried, as I intend on having the car for a long time, and intend on making a lot of power down the road.

[dirtybrd]

The only fix is the stop the oil vapors from being sucked into the intake. Nothing will remove it except soaking, picking and scrubbing. This is a issue on all the FSI motors. Seafoam/BG treatments won't fix it unless you do them once a week.

[swoardrider]

The only fix is the stop the oil vapors from being sucked into the intake. Nothing will remove it except soaking, picking and scrubbing. This is a issue on all the FSI motors. Seafoam/BG treatments won't fix it unless you do them once a week.

Thank you. I've said it before but these guys don't listen. If the VW guys are soaking valves for hours with Seafoam then using picks and elbow grease to get this carbon off, that means there is nothing out there you can just spray over the valves for a couple of minutes that will work like magic.
Everybody look at the first pic I posted again. This guy has 28k on it with a catch can and meth/water. His valves still look like they came out of a 200k engine running Mexican grade 85 octane. If running a constant supply of meth/water to the valves doesn't keep them clean, nothing will.

[inphamous_A4]

Shell gas has nitrogen enriched gas. supposed to clean intake valve and injector.

http://www.shell.ca/home/content/ca-...e_experts.html

[Grishbok]

lol, anyone here know what happens to carbon molecules under high intensity heat and pressure?

Effectively its inevitable in a combustion engine for there to be residue, THAT much at 28k is definitely NOT the norm. The famous phrase from the RX7 was a "a redline a day keeps the carbon away"

[bishop13]

Shell gas has nitrogen enriched gas. supposed to clean intake valve and injector.

http://www.shell.ca/home/content/ca-...e_experts.html

Has anyone been able to prove/disprove their claims? All I've been able to find on the interwebs are statements ranging from "my butt dyno registers an improvement" to "BS/marketing gimmick", but no actual tangible evidence yea or nea.

[swoardrider]

Has anyone been able to prove/disprove their claims? All I've been able to find on the interwebs are statements ranging from "my butt dyno registers an improvement" to "BS/marketing gimmick", but no actual tangible evidence yea or nea.

Who the F^*k cares!
READ PEOPLE, READ. I don't care if you put rocket fuel in your gas tank. IT'S NOT GONNA MAKE A DIFFERENCE. Zero gas gets on our intake valves. You have a direct injection motor. That is the whole cause of the carbon build up, thus this thread was born. It's not like all of us Audi or VW owners are running shitty gas or something.

[Tanner]

As mentioned above, we have direct injection. Fuel sprayed right into the cylinder chamber which provides a better and cleaner burn. And the downside to that is that the intake valves gets coated with a layer of gunk over time. Port fuel injection will benefit from these cleaners as the fuel is mixed with the air before the intake valve.

Toyota/Lexus is currently developing an engine that is a combination of both direct injection and "port injection". Port injection more for some of the fuel to make contact with the intake valve to help minimize the problem that we're seeing in our FSI engines.

While I had a bit of stumbling going on back in February, the stumbling hasn't come back. One thing that a master tech mentioned is that these engines needs to breath and run hot from time to time. For two tanks (plus fuel cleaner), the engine was ran hot and at high revs on the highway, and noticed that the back of my bumper was a little more black than usual. So a couple of times a day, I'll run it right up to redline (after the engine has been warmed up of course) and so far the engine has been running pretty smooth this summer.

But I'm pretty sure that I'm just delaying the inevitable where the intake valves will require a good cleaning (with about 86,000km).

[eskimopunk]

I hit redline every time I drive lol. This seems like a bitch to get rid of