Ok it's definitely threaded. I got the damper started on by greasing up the crank snout and the inside of the damper with anti-seize and oil. Now I want to pull it down with a tool or just insert a crank bolt. If I were to install a crank bolt what size threads do I need and how long? What torque should I torque it to? Can I just install a crank bolt and tighten it down to 135lbs-ft and then zip the bolt off and leave it pressed on like original?