[C320-list] Coolant mixing with raw water

[Troy Dunn]

My vote is for small leaks inside the heat exchanger.   The combination of
high pressure on the freshwater side and the Venturi effect on the raw
water side is likely to drain your coolant very rapidly, and at an
accelerating pace as you lose more coolant and the fresh water side starts
to get super heated.

I wonder if you might need to do a couple of flushes of the block once you
figure this out in case any raw water...hopefully not saltwater...got into
the block as the engine cooled back down...that could be pretty bad.

Troy Dunn
Hull #514