Moderator: volvite
smj999smj wrote:Just be careful not to overtorque them, but you should be alright. You don't have to remove the upper intake plenum to replace the plugs. You'll need a good assortment of 1/4" and 3/8" drive extensions, universals and a reducer. Four of the plugs are easy to get to; it's the front two on the right bank that are a bit of a pain. Cyl. #3 coil comes out with a little bending and the plug is accessible with a little ingenuity. Cyl. #1 is the tough one. I use a ratcheting 10mm combination wrench to get the coil bolt out and in. To get the coil in and out, I separate it into two pieces by removing the spark plug boot off of the coil itself (be careful not to lose the spring) then remove each part of the coil through the opening in the upper plenum. Once the coil pack is removed, the spark plug is easy to remove and install. Before installing the coil, I spray some silicone spray lube on the end of the spark plug boot to make it easier to reassemble with the coil. I then install the boot and spring into the spark plug tube. Then, I get the coil through the hole in the upper plenum and reassemble the coil onto the boot with the boot still partially in the tube. It's awkward, but I did it even with my fat hands! Once the coil pack is back together, it can be pushed fully into the spark plug tube and the hold down bolt reinstalled. I get as much of the bolt started by my fingers as I can, then install the ratcheting combo wrench and use a long screwdriver to apply pressure onto the top of the bolt to keep it from turning back. Takes me about 40-45 minutes to replace 6 plugs doing it this way while taking my time.