I just changed the spark plugs in my 2006 2.7 SE charger. I just turned 85,000 miles and started to notice a bit of stumble off idle. Now she's running buttery smooth again. I figured I'd post up some pics and tips on how to do it since I couldn't really find anything on the internet with pics...
The upper intake manifold needs to be removed to access the 3 passenger side plugs. It's not that hard to do yourself and only requires basic hand tools and a little mechanical know how...
5/8 spark plug socket (I used one with and one without the rubber boot)
Feeler Gauges to set check gap
I also used a 10mm T-handle for the intake bolts.
1) First step is to remove the negative battery cable (located in trunk under the carpet). 10mm socket. Also blow any dirt or debris off the motor with an air hose or vacuum.
2) Unplug the following connectors. Press the little tab in the center and firmly pull back.
3) Remove your intake or airbox. I have an aftermarket one so i just loosened the hose clamps from the throttle body, unplugged the IAT sensor and hose and pulled it off.
4)Then unplug the 3 hoses on the rear of the intake. The larger one with the metal lip is easier to pull all the way out once the intake bolts are all loose. I was able to angle it forward while gently pulling the hose back. It's very stiff so don't break it!
The 3 rear vacuum hoses unplugged. This pic also shows the wire harness connectors from the throttle already unplugged.
4)Unplug this vacuum hose:
I also removed the dealer service cap and placed it aside.
5) Remove the 2 intake support brackets on the passenger side from the intake studs. Upper is a 10mm and lower is a 13mm. I just loosened the bottom 13mm ones and wiggled it off the studs and left them in place.
6) Loosen all 7 upper intake bolts (10mm) I fully loosened them and left them in the holes.
These 7 bolts.
7) Lift up on the intake and gently pull it off. It takes a bit of finagling to get it around the dealer service tube so take your time and angle the front up and to the right and it will come off. Carefully set it aside out of the way. I used a clean rag to cover the intake ports so nothing falls in.
Here is what you will see. As long as the rubber gaskets are not torn or damaged you can reuse them.
Passenger side coil packs.
One coil pack removed.
Stock plug pretty worn out.
8) Remove the coil pack wire by pushing down on the tab in the middle and pulling straight back. Then remove the 10mm bolt. The coil pack will then pull straight up and out. Get your long extension and 5/8" plug socket and remove the old plug. I did them one at a time. It helps to have two 5/8" spark plug sockets, one with the rubber grip boot and one without. I use the rubber boot one to remove the old plug and to insert the new one and get it started. Then I tighten it with the other socket so I can pull it out of the hole. I tighten them to snug plus 1/8 turn. I use anti seize on the plug threads and dielectric grease inside the coil pack. They were gapped at .050.
8) Reinstall everything in reverse order. The intake bolt torque is 12nm. The torque sequence is as follows.
9) Make sure all the connectors and vacuum hoses are properly reconnected and then reconnect the negative battery cable and start the motor. Hopefully it fires right up and idles smooth...
Overall it took me about a 1.5 hours, but now that I know how to do it I can probably do all 6 in about 45 min to an hour...That water housing leak is next on my list...
(Disclaimer: I am not a professional mechanic and this is just for reference. If you are unsure of any of the following procedures, take you car to a shop. Also a factory service manual is highly recommended. Work on your car at your own risk!)