A new rope seal usually makes a crankshaft very difficult to turn. I've seen an improperly installed seal actually lock up an engine where it couldn't be turned with a wrench on the crankshaft snout. 30 or 40 ft-lbs of torque to get the crank to start turning isn't uncommon with a new rope seal. It "wears-in" pretty quickly, however.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!