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Alright guys... run with this: drained the oil - very clean, no antifreeze, no metal, pulled the oil filter and cut it in half - no metal shavings of any sort visible, pulled the oil pan/cover and no metal - little bit of settled dirt, but overall clean.
Got a different borescope today, as the one I linked to from Harbor Freight didn't fit - go figure. The new one can take pics and video, I captured some and can post them if you think it would be helpful, but the top of the piston looks fine, the cylinder walls look good and all the the valves look good. I was able to spin the motor (by hitting the starter for a sec - borescope removed) and see the valves in different positions so they look like they are operating. Can't see anything that looks out of place or wrong - but I'm a novice here. What should I be looking for?
Wouldn't a blown head gasket allow antifreeze into the oil or into the cylinder?
If the rings failed wouldn't there be oil in the cylinder? There was a small amount in the bottom of the cylinder, but only a very small amount.
0 psi confirmed one more time.
Next?
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