If your doing the CCV you might as well do the oil filter housing gasket to head off any oil leaks down the road. (Or it might already be leaking and you do not realize it yet.) Taking the oil filter housing off makes installing the CCV a breeze. If you do go that route...Bavarian Auto sells a version of the gasket made of viton for $20 that will last much longer than the oem gasket. And since you'll have the alternator off...might as well put on some new belts!