It is very important that the distributor and cam gear are properly oiled..if not they will chip, break or wear very fast and the pieces end up ruining your oil pump (timing cover) and eventually end up opening your oil filter bypass and damaging bearings,crank,cam,lifters and in some cases spleening your roller rocker bearing. Here is a pic of where why and how oil gets to your cam and distributor gear. The large timing gear (upper gear) depending on the manufacturer MUST have these oiling holes or grooves with a recess on the other side facing the front of the engine for oil to reach your gears....Lets take a look