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Old 01-09-2017, 12:43 PM   #9
Ski in NC
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City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,404
Dave- I agree that the Cummins vertical core creates an inherent trap. Weak design. The horizontal cores like Yanmar do better, but cores still get stuck. It is not necessary for water to pool on the core/housing joint, just being damp sets up the cell just fine.

Any time I see aluminum housings with bronze end caps I cringe. Does not matter which fluid is being cooled, the housings tend to corrode.
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