Second question, I was looking at the Pelican parts diagram of the oil pump and its parts, the gear is #3 just incase you didnt know, Put I noticed at the end of the shaft the show a o-ring, Mine didnt have this when I removed the pump, I would think that o-ring would get crushed by the crank pully. Is the o-ring correct or a mistake its part #4
Link to diagram
http://www.pelicanparts.com/PartsLookup/HTML/924S_USA_KATALOG/104-00-Frame6.htm