ELEVENS

2007-B RS4
Symptoms: Runs perfectly, never threw a CEL
Hints of power loss: Traction control light quit flickering under full throttle about 1-2 years ago.
Mileage: 33,000
Fuel: Shell 93 exclusively
Oil: 3000 mile oil change intervals, alternating between Castrol Syntec and Pennzoil Platinum Euro
Other: BioSyn Injector cleaner every tankful.

Chazaki

Wow that looks nasty... Hate too see whats inside mine :-\

RS4bro

Audi really needs to own up to this and do something! I guess we have to wait for more R8 owners to sue...

Alister

That's unbelievable!! : - (

fjorkduf

how much did it cost you to clean out?

ELEVENS

Four cans of Seafoam @ $8 = ~$32
Intake gaskets: ~$35
Oil change was timed to coincide w/ post-CB cleaning, so no extra $$
Labor: DIY

...so about $70.

PulpExposure

How do you remove it? Did you take "after" pics? I would like to see those. I just got my RS4 last week and this sort of worries me. But it looks like just part of ownership and maintenance. Thank you.

RI A6

How did the ultrasonic cleaner work?

Chazaki

How long did that take you to take apart and clean etc?

ELEVENS

I'll do the valves tonight Scott, so I'll let you know. Last night I used the sonicator on the (anti) tumble plates. It didn't physically remove the junk, but rendered it to the approximate consistency of peanut butter. I suspect the same with the valves. Not a substitute for manual scraping but will help. Once the junk is loose, I'll pull the junk out of the ports by flushing Seafoam (in/out/in/out) with a 50ml stainless steel syringe with long, blunt needle (used for veterinary oral dosing). Then repeat with fresh aliquots of Seafoam until the rinsate is clear.

I call it junk because it's technically not carbon. More like coke I guess.