Camshaft phaser?

Had no oil pressure suddenly while driving highway speed. Units engine has a lot of tic and rattle noise especially at start up. But is loud as long as it's running. I have researched a bit and learned that oil pump can be faulty/weak and there's a change up. Also, that failure of cam phaser system parts can cause oil psi issues. I'm going to delete the cam phasing system. Can I get the procedures for doing that as well as oil pump replacement?