Originally Posted by 35mphgolf
how to prevent additional buildup (oil catch can etc..)?
I *think* the carbon buildup is tied more to the use of the EGR system than oil. My limited understanding is that modern diesel engines are running much more aggressive EGR (higher volume), and that is the underlying cause. OTOH, I might be wrong.
I for one will investigate options for closing off the EGR valve and coding it out once I am out of warranty.