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MD11C water leak between the cylinder jacket & block

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wsgodlewski

New member
I have a 1980 Pearson 323 with a MD11C engine. I have a water leak between the cylinder jacket & engine block along the vertical where the 2 section meet. There is NO water in the oil. The water starts leaking as the engine starts. The engine starts up quickly and it runs well, the hour meter reads approx. 1,000 hours of use. The boat has had very little use over the past several years.
Any suggestions.
 
The cylinders of a MD11C sit on top of the block casting and the heads sit on top of them. Similar to the basic design of an air cooled opposed cylinder aircraft engine or VW auto engine. Exhaust manifold bolts to the heads. My point is that there isn't water flow into the block. You could have a leak at the head to cylinder gasket or the exhaust manifold. Given the age of these engines particularly if the are raw water cooled should make you very suspicious of the exhaust manifold.
Good luck.
Terry
 
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