The Jenks AI removal page says 20Nm, "the same as sparkplugs".
I pulled everything, but saved it in case laws become more stringent here in Maryland. (God forbid...)
There is a neat ft-lbs conversion chart on the BonnevilleAmerica.com homepage. I printed and laminated it. I use it all the time, much more handy than looing up a number in the book and my wrenches are mostly ft-lbs.
It's in PDF or Excel Format: http://www.bonnevilleamerica.com/downloads.php