Very odd, and sure got me curious.
Is there a coolant line somewhere above the engine that could have leaked antifreeze and dropped it onto the engine?
I find it tough to see how a block or head could have ruptured and squeezed antifreeze up around the plugs -- that clearly is good strength antifreeze. There would have had to have been pure water somewhere behind the antifreeze that froze and pushed antifreeze ahead of the expanding ice, for example.
I wonder what the yard mechanics think.
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1974 C&C 27
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