First I would just like to say the search function on this site is unparalleled. And I found this thread http://www.supramania.com/forums/showthread.php?t=10549&page=3
My oil pan drain plug surface has been dented before I ever laid eyes on my car. With that being said, I fixed this a couple years ago and just chalked it up to a bad design. I noticed the missing threads inside the pan and thought that was damage. Now I know those missing threads are factory equipment. Here is what I did-
It's a little hard to make out, but I am using 2 drain plug gaskets with a washer inbetween. The gasket that contacts the drain plug is a stock gasket, the one contacting the pan is aftermarket. It's actually one of the same ones I used for the No.3 cylinder head cover plugs. It "bites" a bigger diameter than the stock gasket does, thus covering up that pesky dent. My only gripe is it doesn't thread in nearly as far as it does stock. I came up with this idea on my own, in a mad, desperate attempt to NOT swap oil pans. I would have posted a pic of the dent, but it's not really noticeable with the naked eye, your finger can certainly feel it, though.
My oil pan drain plug surface has been dented before I ever laid eyes on my car. With that being said, I fixed this a couple years ago and just chalked it up to a bad design. I noticed the missing threads inside the pan and thought that was damage. Now I know those missing threads are factory equipment. Here is what I did-

It's a little hard to make out, but I am using 2 drain plug gaskets with a washer inbetween. The gasket that contacts the drain plug is a stock gasket, the one contacting the pan is aftermarket. It's actually one of the same ones I used for the No.3 cylinder head cover plugs. It "bites" a bigger diameter than the stock gasket does, thus covering up that pesky dent. My only gripe is it doesn't thread in nearly as far as it does stock. I came up with this idea on my own, in a mad, desperate attempt to NOT swap oil pans. I would have posted a pic of the dent, but it's not really noticeable with the naked eye, your finger can certainly feel it, though.