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      11-15-2012, 02:59 PM   #10
First Lieutenant

Drives: 2013 335i xDrive Sedan
Join Date: Oct 2012
Location: Regina, SK, CAN

iTrader: (0)

Back when I used to turn wrenches for a living, we had an intake cleaning system that you would mount on the throttle body, and it would inject a cleaning solution into the engine while it was running (think Carb Cleaner x 1000). It did a great job cleaning the intake manifold, and I assume the valves as well.

Has anyone tried this as preventative maintenance rather than waiting for the carbon build up to be a big enough problem to need a walnut blasting?