Thru the wheel well - yeah!
Hi,
I found the easiest way to change spark plugs on my 2000 Explorer V8 was to go through the wheel wells, as mentioned here and on other posts. It took me 2.5 hours setup to "Miller Time". As a calibration point, I don't mind putting in the time but can't do jobs with a high degree of difficulty. I would say on a scale of 1 to 10 (10=hardest) this had a degree of difficulty of one
The second side went MUCH faster than the first (once I knew what I was doing). Also, the passenger side is quite a bit easier than the driver's side, so pick easy or harder first, whichever makes the job go better for you.
Neither side is really that challenging. I priced having shops do it, and two quoted me three hours of labor! For a shop I say it would have been an hour, tops. The hardest part for me was using the ^&%* jack that came with the Explorer; would have been much faster/easier with a floor jack. Since I saved $210 in labor, maybe Santa will put one under the tree
I needed a 3" extension, a 6" extension, and for one plug on the driver's side, a ratchet with an adjustable-angle head. The plugs required a 5/8" socket. I applied the goos for anti-seize and the wire boots. I used Champion Iridium plugs and the thing hummed along nicely on the test drive (then again, it always seems to after a maintenance repair!).
I did NOT replace the wires. I did not like the way those things snake around the engine compartment, and 4 or 5 had metal jackets, so you'd have to deal with those too. From observation, I would say the degree of difficulty replacing the wires is around five. I'm not touching them and don't think they needed replacing even at 100k miles...