I would stuff a new microfiber cloth in the fuel pump hole. That will keep shavings from getting in the engine. I'd get one about the size of a washcloth and leave enough hanging out so that it can be pulled out easily. You could also clean off the mating surface on the engine and use GOOD duct tape. I really like Gorilla brand duct tape. It costs more, but it is heavier and sticks better than most. Anyway, I would definitely go the Heli Coil route. I have used them a lot, and I have always had good luck with them.
