Quote:
Originally Posted by dadysev
I have to remember this for my 2011 550 with the direct injection motor but the intakes are impossible to get to as they are on the outboard side of the V.
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The outboard side?
I have the BG tool, similar to a pressurized injector cleaner, with a fogging nozzle that you can mount in the throttle body. It connects to shop air; you run the engine at about 2000rpm and it "fogs" the intake and the backsides of the valves with the cleaner. There are youtube videos somewhere. Probably not as effective as a walnut shell blasting, but it works.
The intake on VAG 2.0 TFSI comes off in about an hour. I fill three of the four intake ports with ISC and let it sit for a couple of hours, then chuck a brass brush into my drill to really clean the stems/guides/ports. Turn the engine over to close the 4th and repeat. It's really nasty stuff, but the Audi guys swear by it.