Posted by Bob on July 28, 2019 at 14:23:59 from (64.255.159.199):
In Reply to: 8n oil in radiator posted by Grandpa love on July 28, 2019 at 14:11:50:
Quoting Removed, click Modern View to see
SV, this is a "flathead" with NO oil passages in the head at all (as OHV engines have for rocker oiling), and NO oil passages above the main oil gallery, which is quite low down on the block.
Some have speculated it's POSSIBLE for a RARE crack low down in the block to allow oil to sneak from the oil gallery into the coolant, but this is EXTREMELY rare, if even possible.
I have never seen a post on here that it's actually happened to a specific engine, just speculation that is MAY be possible.
The most LIKELY cause is combustion products sneaking past a leaky head gasket into the coolant over MANY hours of operation, and condensing into an oil sludge.
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