Pentistar Pork and the EGR
Yesterday I got a call about a check engine light, code P0404 EGR curcuit, on a 2010 JK. Since I'm still a little unfamiliar with the 3.8 I jumped on
WranglerForum and found this, which has been an enormous help.
My initial assessment was to remove the battery, battery tray, and start digging down to the EGR, but found that moving the air dam inside the passenger side wheel well was the best course of action. For the first time in my adult life I pulled all the plastic retaining clips without breaking any, and there were only two rivets on the rear of the fender flare that needed drilled to free the air dam.
Once that's out of the way, if you look to the back of the block near the firewall you'll see the EGR. There were two 8mm bolts at both ends of the tube going from the head to the EGR and two stacked 12mm bolts that secure this tube and two vacuum lines in place.
Now here is where things get difficult. First, if you have the automatic transmission (this JK did), your going to have to move your transmission dipstick tube to have the clearance to get to the last two bolts. You will need a S or crecent shaped obstacle wrench, a screwdriver but in 10mm, or be extremely creative because it is tight back there. I had an old ratchet with a slim profile that didn't actually have a ratcheting mechanism and I grinded down one of my 10mm sockets and I was just barely able to get on to the back bolt. Be careful here, there is an aluminium flange where the block and head meet and it tore my hand up pretty good. Throw a shop towel in there and enjoy. This is about when I wrapped it up last night.
After I finish my coffee I'll be headed back down to the shop to finish up. I did decide to do the spark plugs since the Jeep is nearing 80k miles and had never had a change. The back passenger side spark plug is reached the easiest by removing the air dam I already have out, it sits just forward of the EGR and is a pain to get to otherwise.
I'll be checking he owner also identified a small leak in on of the trasmission coolant lines. It's not bad but she wants to upgrade the system because she actually takes her Jeep off-road quite a bit. We're going to put this off for another week or two while we research recommended products.
And the Pentastar Pork:
Last edit for now, but I'll be back later this evening with more pictures of what I'm doing, the parts and tools used. Plus there will be more on the dinner pic.