Thank you for your input, very much appreciated....
My Mechanic did recommend that i'm religious about changing the oil every 5-6k miles (which i've done previously in my e39 as well) as it will help minimize the gunk build up....to make sure i have fresh oil in there...
Quote:
Originally Posted by Stück
That video was a waste of my time to even skip through, but here we are...
1. Those valves were hardly dirty by BMW standards.
2. There is no way to view the valves on a N63 without pulling the engine/intake manifold.
3. Deposits on BMW are typically so hard and thick that they require considerable effort to scrape away, solvent has little to no real effect on them and is only used to clean the port lead in where the walnuts don't touch which doesn't get buildup to begin with.
Dump as many cans of that into the engine you like if it makes you feel better. I would not want all the grime that builds up on the intake valves going through the engine, turbos and then into the catalysts.
Walnuts don't leave a shiny surface, they are a mild abrasive and matte the ports and backs of the valves.
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