Quote:
Originally Posted by jgalaxy
This the very reason why I ditched my N54. This engine will not be a long lasting one. There isn't any defined maintenance for this, but if I was tracking my car, I would be cleaning the intake ports and valves once a year. Regular driving every 2 or three years. It's a bit of a bitch due to the some electrical components that are in the way when you try to gain access to the intake manifold. I tried and gave up, sold the car and bought a truck.
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+1, this is part of the reason why I ditched my car too. Carbon buildup on these engines is quite awful. You pretty much have to do either that service, or SeaFoam.