I own a 2005 3.2 A6 whats the best procedure to seafoam our Direct injection engines. I want to try and get some of the carbon off the valves.

 

?????

 

Sorry, but I wouldn't do that to my Audi on a bet - unless you want to try it as a gas additive and remove the carbon, etc. over time. Way too much chance of doing serious damage to the engine internals...
Jim

 

X2.

If the car is running fine don't mess with it. If you do have a serious carbon issue then seafoam will not clean ALL of it. That can only be done by actually cleaning the valves.

But hey it's your car. If you insist on doing it find any vacuum line and make the car suck in the seafoam and blah blah and Follow the instructions On the can.

 

I've used the cheap Walmart stuff in the gas tank for years on all my cars. Not sure it ever did any good, but they all run well. I did dump a can of Seafoam in the gas tank of my Crossfire, then took it on a road trip. No difference that I can tell. I think it's mostly a gimmick but I will continue to throw in a can every few months. I would not use the heavy concentrate and direct inhalation. Pour it in the gas tank.