Turbo Oil return line cm871

[rapidisimo]

Just replaced my turbo and so far so good. Now I have a small oil leak coming from the oil return line. It's coming from the seal connection near the oil pan on the block. Has anyone changed that seal before? Just ordered a new one from cummins and wondering how much of a pain in the ass is it to change it out? Doesn't look to difficult but I always think that until I start the job and then damn wtf is it so hard to replace, lol. Any advise would be greatly appreciated.