I have a closed system for the twin engines, but raw(sea) water cooling for the exhaust manifolds and heat exchangers for the engines and the xmissions. I assume that there is no way to cool the manifolds and xmissions in a closed system with antifreeze, and block off the manifolds and run a seperate raw water for the exhaust back out to sea.
On Feb 28, 4:23 pm, gene <[email protected]> wrote: > John: > > What you describe is commonly referred to as Fresh Water Cooling (FWC) > or more accurately, a closed cooling system. Internally, the engine > circulates antifreeze, just as in an automotive engine. Typically, > there is a block-off plate between the exhaust manifold and the > riser. A hose below the block-off circulates the anti-freeze to a > heat exchanger which is in turn cooled by raw water From the heat > exchanger the antifreeze goes back into the engine. Above the block- > off plate, raw water is introduced which then flow out with the > exhaust gases. In many systems, the raw water first cools the > transmission, then the heat exchanger and then out through the riser. > > The system you describe I believe is a "keel cooler." The copper > pipes run along the keel and are cooled by the raw (salt) water. They > are filled with antifreeze which circulates back to the engine. > > Most engines are able to be converted to a full or a partial closed > system. In the partial system, the exhaust manifold is still raw > water cooled. Converting a salt water cooled engine is generally not > a good idea if it has accumulated a lot of hours. > > Gene --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/UnifliteWorld?hl=en -~----------~----~----~----~------~----~------~--~---
