To begin, you'll have to displace the EVAP/purge apparatus, which is plumbed into the valve cover. This is on the passenger side cylinder (forgive me, as I am not sure how the cylinders are numbered). It is fastened to the valve. cover with three 8mm bolts. They are circled in red. The front two come easy. For the rear, it is buried under the wire harness. You will have to push the harness aside, in order to get to this one. It may be a little stubborn, as the harness is anchored on this valve cover vent apparatus.