Thanks for the info. Basically the mechanic I took it too said that they wouldn't try a sealant and it would be cheaper to replace the engine than to have this fixed. They think that the head is cracked and its more than the gasket based on how it starts and sounds (I mispoke earlier when I said head gasket)...It does shake and misfire bad when it starts but once warmed up it runs fine. It doesn't overheat, no oil in coolant or vice versa. Oil level is fine and looks basically the same as when I changed it last. Maybe a second opinion would be best in this case.