Originally Posted by CmptrNerd
I was looking at opensourceguy'* sig pic and it shows his cylinders and I saw there there were coolant passages under the cylinder heads. Could I have a leaky gasket there or do those gaskets not really leak?
Yes, cylinder head gaskets do leak. I don't think it is a very common problem on these engines, but it does happen. I would look in every other possible place first, though, and try to verify that the head gaskets were leaking before I started in to replace them.