I need some help with my water pump replacement. As I removed the old water pump, several bolts sheared off. Five, actually. They all sheared off right at the head, so the stubs were sticking out once I finally got the pump out. I squirted PB Blaster on it for 24 hrs, but when I tried to remove the broken bolts, they sheared off flush with the timing cover. I stopped after shearing off 2 of the five. Wondering how to remove the remaining bolts without further issues and how best to deal with the two that are broken flush with the housing. I’m hoping I don’t have to go deeper into the motor at this point with an all new timing cover. All suggestions and insights are welcome.