Hello all, replacing my head gasket on my 2004 3.0. engine has been running good for last few months that I've had it- just recently noticing varying temperatures 160-175 up and down while running and water beading up where the head gasket meets the block. Decided to go ahead and replace the head gasket. while taking it apart noticed the cover over the cover on the starboard side on the engine had rusty gasket build up as well is this something that you can replace? I removed the 4 bolts holding it to the block and it doesn't seem to come off easily rtv gasket I'm guessing. Pic attached any input/opinion would be appreciated