[pauloregon]

Depends on how you define "a pain". It's a lot of work to remove all the stuff to get access to the front of the engine, at which time you might as well do the balance shaft seals, crankshaft seal and pump sleeve, as well as the camshaft seals. But, once you get all the cruft out of the way, it's rather simple to replace an o-ring here, slide an onion-skin seal there, etc. Just make sure to watch out for the oil seal details, using the right one on the right shaft, etc.