I recently hauled out my boat
, a few days later I went to replace the coolant/antifreeze. I looked in the radiator cap and to my surprise I couldn't see any. I have checked the level fairly regularly over the last few months at sea and it has been pretty consistent and hasn't required topping up. I pulled the heat exchanger
off and there was visible coolant
in the raw water
pump, and the raw water
intake strainer. Somehow it has leaked back.
Skipperpete said this in another thread which pretty much sums it up.
"A compromised heat exchanger core
is unlikely to leak into the exhaust
, it will possibly drain the coolant
out to sea level via the raw water pump
and in some circumstances the coolant tank can refill with raw water, particularly where the engine
is below or on the waterline but also from the raw water circuit pressure"
I don't believe the coolant tank was filling with raw water as the level seemed to stay steady.
I have filled the coolant side of the hx with water and there is a small leak showing up in the raw water side but I haven't managed to pin point which tube it is coming from yet. I can see 2 tubes have been previously capped. How do you think I should proceed, take it to a radiator shop and get them to find the leaky tube and cap it?