so i put on solid motor mounts and i noticed today that the mount on the pass side on top it is on with 3 bolts and where the top bolt goes into the car there is a welded nut there well where that nut is that part of the car is cracking. my question, is it safe to weld the mount where it is cracked ? and i dnt understand why it cracked either its kinda freaking me out at this point