What is the proper press fit for Fluidampr?

Proper press fit is .0005 - .0015". Maintenance of a proper press fit between the damper i.d. and the crank snout o.d. is critical for damper performance. That's why a hammer should never be used to install a damper. Pounding can cock the damper on the snout causing the i.d. to open up. It can also cause wallowing out of the bore, or the damper spinning on the crank. A threaded installation tool presses the damper in place evenly without putting stress on the threads in the crank snout.