I have a tool from an old tool set, probably similar to what was described as a sneaky pete.
I threaded the tool into the seal and pushed on the opposite side with a small wood dowell. It took two attempts but it came out. I didn't loosen up any other bearing caps but that is not to say yours will work that way. You could probably make a tool as it is little more than a rod with a bend in it for a handle and threaded on one end. Keep it away from the crank so you do not inflict any damage. Fred