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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?
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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
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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 !