Be aware those pipe plugs can be a bear to remove--they often get rusty and were installed at the factory very tight--use a 6 point socket that fits tight on it or chances are good they will just strip ,and the only thing that might work to remove them after that is a pipe wrench,or welding another nut to them........................................................................................I have removed them on many engines,but some refused to budge,even with a long breaker bar,so I let them be,rather than risk block damage by heating around them with a torch...if yours come out,you might want to replace them with brass ones,and use teflon tape on the threads to seal them good,and dont crank them in too tight-being tapered pipe thread,tightening them too much can crack the block easier than you think...