If you have (or can borrow) a dampner puller, by all means: remove the dampner, remove the timing cover, replace the front crank seal, then put it all back together with a new timing cover gasket, this time leaving the timing cover loose until the dampner's snout is through the front seal before tightening the cover down. Inspect dampner snout for a groove before reinstall, and smear some
oil on it's outside s it slides nicely into the front seal.