[Frank The Plumber]

Yeah 15 to 22 is fine. Keep in mind you are going into an aluminum cover assembly, torque specs per bolt size and all of that go out the window. !5 is better, I don't even torque these, never have and never leaked. I use the justabouta method. Just about a same force as applied to taking off a beer bottle cap. More than that will result in tears or purchasing the cover I have in my parts stash.