Ok, I'll explain. We do it on airplane piston engines. Keep in mind that the propeller flange is way bigger than auto crank flanges. We remove the spring in the backside lip of the seal, then heat the seal up a little with a hairdryer to make it more pliable. There is a tool that resembles a shoe horn that lets us stretch, and walk the seal around the flange. After it has regained its size, and shape, we reinstall the spring, and push press it home using contact cement to seal, and hold it in place. On some very large flanges for constant speed props, we slice it, the install it with that slice at the top position. I don't see why this type of seal, and retainer couldn't be developed for car engines.