High Oil Pressure >.<

I've messed it up too. It happens. The kit's like under $10 so I'd just get it to have on hand when you pull the pump. When you re-assemble it, just drive the new plug in enough to get the cotter pin behind it. Any further and you may have high oil pressure. It places stress on the oil pump drive and robs a bit of power, not to mention adding heat to the oil for no reason at all.