I would tend to think this consistent leaking is more of an installation issue. Even if you are able to install the mounting bolts without struggle, you still need to compress the seal. My method has worked for me countless times -- Give the top of the seal a thin smear of grease, insert all of the mounting bolts except for the very bottom one and get them started in the threads and gently drawn up to pull the pump in towards the block but not so tight as to lock it in place. Now insert a phillips screwdriver or other rod (punch or drift) into the bottom hole and use the tool as a lever to lift the pump while you tighten the other bolts. That's all the pressure you need - no jacking the pump into place or any other creative way to apply pressure. A very thin coat of grease on the gasket is something I also do. -- Dave