Ok guys I have a 2000 civic ex. the other day I took off my valve cover off the other day to polish it and strip off most of the stuff that was on there. When I went to put the cover back on, I was tightening the bolts to the cover and two of them broke. I got two new ones from Honda yesterday along with a new cover gasket. Any suggestions on getting the broken parts of the bolts out of the holes?