Quote Originally Posted by 16mojo View Post
thanks for this. quick follow-up - do you think it's the closed internal? I believe it's a closed system so would the problem be limited to heat sink / heat exchange or can the closed system still freeze up?
Like others have said above, I'm sure the engine is fine. The damage should be limited to the heat exchangers (there are 3) and some hoses and fittings. Worst case, the exhaust manifolds too, that gets more expensive and time consuming. Best of luck!