Quote:
Originally Posted by Scott ZHP
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. |
Outboard side, meaning the outside of the V as they run the turbos in the middle. there is no room to unbolt them and properly walnut blast the intake on the head. I have never heard of any product that will clean a seriously carbonized intake on direct injection engines.
My car had a recall done so my heads were taken out and were cleaned and the amount of carbon on them with 80,000 miles on them was crazy. I'm not sure if any chemical in the world could clean that up through and intake spray.
Go and look up an N62 engine and carbon cleaning and you will get a better understanding of what i'm talking about. its the worst design but lots of fun power!