Thanks for the reply Bowtie! I did something similar. I ended up using a dremmel to smooth down the old plug. I flushed the system because there was a lot of crap in there after, but I stuck an expansion plug in there. That didnt work at first so I used the dremmel and took the rest of the plug out, got it down to the block. When I tried to put a metal plug in the block was a little warped so I ended up using the expansion plug. It seems to be doing fine. Hopefully it stays in there good and tight. Thanks for the response!