Stop turning the engine over!
Remove the drain screw on the lower barrel (little bolt on the forward face) and let the coolant out - dispose of properly!
You may have coolant in the crankcase, as it may have leaked past the rings. This is not good.
Personally, I'd remove the head and the barrel too, so you can check that the crankcase is water free.
When you remove the head from the barrel, have a close look at the gasket, and you'll probably be able to see where the coolant is leaking. Also have a really good look at the barrel, as it is possible (though unlikely) that the barrel is cracked. Haven't left it to freeze with just water in there have you?
When you rebuild, use new gaskets top and bottom, and torque it up correctly.
Let us know how you get on.
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MC21SP Plaything
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