now that you mention that, I seem to remember the head gasket had "top" embossed in it. I'm not sure if that would make the difference or not. Not to mention the fact, I may not have really seen the word "top" embossed in the gasket. But it's worth looking into, as that is really the only other thing you did that might have done what it done. It looks to me like you will have to be taking this apart anyway.
