Quote:
Originally Posted by Gerard Hebert
One is losing a little coolant, around a quart for the season. It's not getting into the bilge or the oil.
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Your heat exchanger is going. The raw water side of the heat exchanger is significantly lower pressure than the closed cooling side. Over time, pin holes develop in the tubing, causing coolant to leak into the raw water side and get discharge with the raw water.
If one is going it, the other is close. Service or replace your heat exchangers.