Bought my first Wrangler 2 weeks ago, just love it. Is there any write-ups for replacing spark plugs on a JK wrangler. I couldn't find any. 3 spark plugs on the driver side is very easy to be located, but the the rest 3 on the passenger side are hiding underneath a cover. Anybody know how to remove that cover to reach the spark plugs. Thanks......
I checked my maintenance manual and there was no info in there on removing the panel...at least I could not find it.
08 JK 23S - Colorado Jeep Club No. 204
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Just follow the engine wires and you come to the plugs. The passenger side plugs are a bit harder to get to, especially the #1 plug, which is closest to the passenger. You'll need a swivel to get at it.
I did mine last weekend. It took about 10-15 minutes to do the driver's side, and about 30 minutes to do the passenger side. A bit of a pain, but absolutely do-able.
are everyone's plugs going bad already? I still have my originals in after 61K miles...
2007 White Jeep Wrangler X-auto, black freedom top, 15x8 Pro Comp Rock Crawlers, 33x12.5x15 BFG KM2s, Superchips Flashpaq, 2" OME Spring Lift, Bilsteins, Rusty's Adjustable front and rear trac-bar, JKS Quicker Disconnects, Rusty's adjustable lower control arms (front and rear), PolyPerformance adjustable upper control arms (front and rear), OEM Rubicon Rock Rails, Finishlinewest Stonehenge Series rear bumper, Smittybuilt winch, Body Armor Front High Clearance Bumper w/ KC Highlights mounted, Roadmaster towbar, Valley 2" receiver hitch, Skid Row Engine Transmission skid, sPod switching system, KC Highlights windshield mounted lights, Delta replacement non-quadbar xenon headlamps, and Bestop saddlebags-Member of the United Four Wheel Drive Association and Blue Ribbon Coalition, †John 3:16†
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Using a 4" extension and a u-joint ("swivel") with the socket wrench makes some of them easier. The "guides" that the wires run through can be pulled off and pushed back on when you're done. (JK plastic crap)
I spent 2 hours changing the spark plugs on my 07 unlimited and finally got to the back sparkplug through the wheel well on the passenger side using my left hand. At first I couldn't get the wire off. When I got the wire off, I went through the top and I used a 3inch extension with a swivel to a 10inch extension and the spark plug came right out. This is almost certainly the worst Jeep design ever. If the battery tray had a removable section (close to the engine)all you would have to do is pull the battery and it would be easy as pie. Good luck guys and gals.
The plugs on the passenger side at first look seem difficult and reading all the posts did give me any confidence however they are just as easy as the passenger side, it just require a little bit more prep.
First, you will need three medium/large zip ties and a flat head screw driver. Now remove the rubber tube that is connected to the air box that holds the air filter and move it out of the way.
Secondly, there are two other rubber tubes that are held hostage by a piece of plastic, use your screw driver to unlock. Once they are freed zip tie it up and out of the way.
Now, the only thing that should be in your way is the plug wires. So disconnect them all and zip tie them up and out of the way, that is unless you have a little helper. Now the prep is done so go to town.
Seriously, you do not have to go out and buy anything unless you need an excuse to go buy something you don't have.
Tools: 3 inch extension, spark plug socket, ratchet, flat head screw driver, two zip ties, 9 year old daughter(wanted to help). Staring at it the area and stressing out 15 min, Prep 5 minutes. Total time 10-15 mins for the passenger side. I didn't count the time staring at it stressing out. Good luck and I hope this helps!
I agree with the others, swivel worked best to get them out.
Maybe I dont remember them being to difficult because I did mine shortly after I did my wife's Highlander. Front three 15 minutes, back three took 3+ hours. Back three you cant see next to firewall. Had to take intake manifold and wiper motor panel out to get to them.
2008 JK Rubicon
-255/80/17 BFG KM2s, 16/59 JKU springs, 2013 Rubi rims, RC stubby hybrid front bumper, XRC8 winch with synthetic line, RR evap skid, and more to come
1998 TJ Sahara Sold
-3.25" RC spring lift, Eagle alloys 125s, 33x12.5x15 Cooper STTs, XRC8 winch with stock bumper mount
1994 YJ SE Sold
-4" RC spring lift, 33x12.5x15 Firestone M/Ts, Eagle alloys 125, and a 4 cylinder to boot
1960 Willys Wagon
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Another good trick - use the spark plug socket that has an external hex on the end - a 5/8 box wrench (or 5/8 shallow socket with swivel) to turn it. That can get you into many a tight place. Its easier to get the socket on it with nothing connected - then wrench or socket to break loose and fingers the rest of the way!
J Wm Bishop EA, ASADE
The world is made from rocks and mud. Maturity is knowing when to stop playing in the mud...