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Seen one at work almost that bad! I removed the most i could, ran the car on mobil clean 5000 and fresh filters. Last I remember, it was runnin great. We have alot of stupid customers that neglect there cars. The vanos and the HVA cam tappets will take the most of the beating, vanos can be rebuilt but the tappets would need replaced soon. Those are pretty dang tough engines, long as they dont get overheated bad. One thing BMW did was go to a 15K mile oil service interval.....Just too long, even then sludge starts building up. At our shop conventional oil 3mo or 3000mls and 6mo or 6000mls for synthetic. Alot of owners go over there SI so that makes an extended SI worse. We have some old M20's with over 300K on them and the insides look brand new and clean and still have crosshatch hone marks, all on conventional dino oil. The motor in the link can prolly be saved, lots of rapid oil/filter changes on Mobil clean after they clean it good. Id clean it out, run some engine flush in it right before they repair the vanos and change oil/filter. If its cleaning up, wait on the vanos a tad for more flushing as not to hurt the fresh vanos seals.
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