J B Weld!!!!!!!! I've used it many many, many, many,....well lets just say I KNOW it works! I ride a stunt bike, and crash alot. I Have J B Welded my radiator, stator cover, clutch cover. Hell I even did my header!! All the covers on my bike are alum. The header was a bad idea it burned through that. You have to clean the area very good!
I would drain the oil. Let the car stand for a good hour or so to let the oil stop dripping. clean the area with brake cleaner, then scar it up with a dremel, sand paper, file. Then hit it with the brake cleaner again. Let dry 5 min. then J B Weld the snot out of it. Let stand 24 hours. fill with oil and drive. The J B Quick weld dries with in an hour. but I would go with the regular stuff.