So.. In the process of removing the spark plug cover this past weekend I discovered that the cylinder head cover has something missing. Basically just noticed a bolt or something missing. From standing in front of the car, it's located at the top left uppermost portion of the head cover - ie: in front of the passenger seat. (See red arrows in pic)
http://www.eroded.org/~lou/cylinder_head_arrow.jpg
I've scoured the service manual, don't really see anything mentioning it. Judging from the pics, there looks to be some kind of attachment that might have held a cable or hose or something.
Is it a cause for concern? Any pressure leaks? Part #s for replacement?