I'm switching out the oil pump on my 2.4. I just poured a small amount of oil in it then let it drain out the pump. Then I plan on removing the coil pack and fuel pump relay and cranking it before starting. Will this be good enough? I figure when you stop the car or drain the oil all the oil seeps out of the pump anyway so it should be fine. I was told to stuff it with motor rebuild grease but I heard this does weird stuff in oil so I don't want to do that. I'm kind of worried though, I heard if theres air in the pump it will cause cavitation? Whats cavitation?