Originally Posted by 35mphgolf
I'm about to buy a 2011 335d - all these head rebuilds/engine failures due to carbon buildup is having me worried. Is there a DIY written on cleaning up your intake system and how to prevent additional buildup (oil catch can etc..)? Should I even be worried?
I think I'm going to add a 2/10 micron secondary fuel filter and as well add water injection
I use to be an aircraft mechanic and water injection would be very very helpful on our engine
This combined with driving hard the car and perform diligence maintenance and no more carbon build up in our cars as well as longer injector durability !