Like SoTxBoTi says,once everything is assembled,pistons,rings,etc,I can't turn an engine over just by grabbing the balancer. Even when I adjusted the mains and rods in my 67,000 mile 216 with the plugs removed, it still took a lot of force to turn it by grabbing the flywheel.
The crank by itself should turn freely by hand. Once you add the rope rear seal, pistons, cam, lifters, etc.it will take a bar on the damper to turn.The key is it should turn smoothly,which is kinda hard to explain, it's more of a feel.
