I have two different washers that were supposedly for the oil pan plug. One is a hard white plastic washer that fits fairly snug to the shaft of the plug. The other is a black rubber washer that fits less snug (see picture). Which one is the correct one? Also, how tight should I tighten the plug?

Last, what is the correct torque setting for the oil pan bolts. I want to be sure I don't over-tighten them. Is 50 inch pounds about right?

I was surprised when the lip of the oil pan hit the oil pump, making it difficult to line up all the holes to get the bolts installed. I almost gave up, but finally got the last bolt in by loosening the bolts on the oil pump and removing all the other oil pan bolts and lifting the pan up to get the problem bolt started. Will the seal on the oil pump be OK after re-tightening the bolts? I don't think it ever moved. I only put the oil pan nuts in by hand, so I hope it will seal fine after tightening them down?