I’ve got an oil sump at work to try and sort out. Two bolts have snapped which hold an air con pump onto the sump. My plan was to drill the broken bolts out and clean up with a tap. One of the lads decided he’d be helpful and do it for me but has completely drilled off centre and manage to cut half a thread but of centre meaning the the pump will never bolt on. Am I best off trying to drill out what’s left and then helicoil it? I’d need to get it back to m8 size. As he’s gone off centre I’m not sure it’ll be over sized for a helicoil. Any tips or advice to try and save this.