[Mr Bob]

Hello everyone. I took the head off to check for a blown head gasket. Gasket didn't appear to be blown but a trail of burned oil came from the piston at a point near the exhaust valve and over to the valve. It looks like it has been recently rebored 010 over. The cylinder shows no trace of honing marks. Is it possible to install the rings incorrectly or could the oil be coming from the exhaust valve? Thanks and have a great day.
Bob