While removing my exhaust to start my transfer case chain replacement, I snapped a exhaust bolt. It appears that these bolts may be pressed in, but i'm not sure. I would like to replace all four if I don't have to drill them out. Any thoughts on this would be appreciated. My transfer case is out. Inside looks great. Only drained about 8oz. of fluid out. It appeared to have no leaks. May not have been filled properly from the factory. Waiting on new chain to be delivered. 70,000 mi.