340 oil galley plugs

Take this plug out. There should be another smaller plug farther up in that hole that threads into the back of the left side lifter oil galley. If the shop left that plug out, I'll bet that's your problem. The only way I know to get to it is remove that plug I circled. You will need a long allen wrench to insert it through that hole and thread it into the block.

340 Block.JPG