Coolant overflow tank

peaman

Sustaining Member
The overflow setup is same function as cars: fluid from the "accumulator" tank is driven from the coolant system by pressure, and then returned to the system as it cools, getting sucked back into the accumulator. I have a Westerbeke tank, but any other suitable tank can be used. A see-through tank is convenient, but not required.
 

Loren Beach

O34 - Portland, OR
Senior Moderator
Blogs Author
If you study this blog entry photo, and the other entry next to it, note that we used a new tank from an auto-supply store. Key thing was to mount it so that it was just above the plane of the hose exit from from the pressure cap. This has been operating OK since 2018.
 
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