I dont know for certain but to remove the oil pump on a ST2 it looks as if the sump has to be dropped and pulled from below. Why do you need to be there? Is there an oil pressure problem or other?

   Yes, the engine was seized when I got it because it was stored outside in the elements and I have to pull the pistons and rods. I was able to free things but there is no compression and I'm rather cetain the rings may be "welded" in the piston grooves so everything has to come out. Fortunately I was able to remove one rod cap but I can't access the two outside rods because the oil pump tubing is in the way. I've tried every possible contortion and just can't get in there with the oil pump installed. Given that, I can't imagine the fun I would have attempting to replace everything (cap and bearing) and re-torquing the bolts. I would appreciate any solutions....I tried sacrificing a chicken but still no luck, lol.
Wayne

Great I will do that and thanks for the quick response.
Wayne