remove the pan
remove 2 bolts holding the oil pump to the main cap
remove pick up tube by unscrewing it
remove the 5 cover plate screws,remove plate
use feeler gauge to check clearance on the rotors and oil pump housing
pull rotor out and look for pitting or scuffing on them
oil pumps are cheap enuff,i would just buy a new one and install it
a lot of people use vasaline to pack the oil pump rotors and then put the cover plate back on and torque the bolts
this primes the oil pump,so it pulls oil right away on start up,vasaline thins out and is flushed with first il change
? of the oil pump gasket comes up also,if it comes with a pump then I use it...if not I just bolt the oil pump on and torque it to the main cap
there are a few other oiling mods that can be done also,but are more for HP builds
drilling it out to 1/2" and the passages from the cam to lifter galley to 9/32",along with full groove main bearings,radius all the turns in the pasages and port match the pump to cap
I have done 2 like this,had about 12hrs on the grinder to blend/port match/drill all oil passages
9/32" drill bit 12" long
1/2 drill bit 10"-12" long
carbide cutters/gringing stones/rolls
had about 40 hrs in the home bowl pocket port/gasket match on the heads,then bumped it to 1.88/1.60 vales
little over kill for a street engine,but I got good results
good luck
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