Going to probably have to remove the oil pan and fish for a rocker arm clip that flew off (on going issue from my other thread on rocker arm issue). looks like it is going to be a tight and hard job due to it being a 4WD. wanted to ask before I start pulling it, any tips, am I going to be able to remove and replace it without pulling starter and dropping front axle, etc. stuff? With 245,000 miles on this engine, if I can pull the oil pan, should I install a new oil pump for future maintenance issues? or am I wasting time and money? Thanks!