Quote:
Originally Posted by ///Motivated
The intake valve deposit buildup was terrible with 1st and 2nd generation DI engines. By 2012 or so most manufacturers figured out how to mitigate the buildup. In several years of reading this board I haven't seen any reference to problems with IVD.
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Just curious, what did they change to figure out how to mitigate buildup? I know from the N63 to the N63TU they improved the valve seals and I would assume the ability of the PCV system to filter oil vapor back into the engine vs into the intake…but I know mine was definitely venting some oil into the intake.