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Originally Posted by ngoma
The worst I see are the vertical scratches in the #2 cylinder. If that's the worst of it that probably wouldn't affect longevity as much as compression and oil burning.
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That's what I have been thinking/hoping also, maybe some mild effects of imperfect ring seal but no major accelerated ongoing wear. Will be a lucky outcome if so. I could have kept running the hone some more and probably eliminated the scored areas completely, but I figured it after a while it would increase ring end gap and piston-bore clearance too much and begin to hurt more than help, so it was a difficult call as to where to stop. I figured I would aim to make the scored areas much shallower but not completely gone. I think you're right that it has to be losing some compression there and presumably allow some oil past too.
It will be interesting to see what this engine is like to start in the winter. Maybe I'll try a compression test on it sometime for curiosity's sake. No obvious change in oil level so far to indicate bad oil consumption, but I have only put about 500 miles on it.
Quote:
Originally Posted by ngoma
What were the PO thinking? Chipping and turning up the boost OK but you better step up the maintenance and inspection schedules to match.
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Good question. I have no idea. I suspect unfortunately (for them) they might have been mainly just misinformed. The engines have a reputation for being "bulletproof" and it seems like they sometimes suffer from harsh use and neglect as a result, from owners who think it means nothing can kill them. The PO may have believed that. The guy who sold him the van (and had done the conversion) may not have tried to dissuade him.