2007 Honda Pilot spark plug replacement

It’s been 100,000 km since my last spark plug change on our 2007 Honda Pilot and I recently replaced the valve cover gaskets and spark plug tube seals but didn’t have new spark plugs to install at the time.
This video shows a how to replace spark plugs on a Honda Pilot, and the procedure should be similar for 2003 to 2008 Honda Pilots with the 3.5L SOHC vtec engine. You’ll need the following:
6 NGK platinum spark plugs (part no.ZFR5BGP / stock no.90804) gapped to 0.044”
Spark plug gap tool
10mm socket and ratchet (or wrench) to loosen the bolt holding the negative battery cable on to the battery
5/8” spark plug socket or Gearwrench 5/8” magnetic spark plug tool model no. 80546 (my preference)
3/8” Ratchet
6mm hex bit or allen key
Small flat head screwdriver (maybe)
3/8” torque wrench capable of 13 ft.lb.
Anti-seize compound
Dielectric grease
Spark plug gap 0.044”
Spark plug torque 13 ft.lb.
Ignition coil bolt 7.4 ft.lb.
0:00 Introduction
1:21 Replace spark plugs in rear bank of engine
3:42 Spark plug gap check
4:05 Resume replacing spark plugs in rear bank of engine
13:58 Replace spark plugs in front bank of engine
24:21 Outtro
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[@HH-gn9qt]

Have you addressed the leaking tube seals? I am 0 for 2 so far on the rear bank. I was super careful the last time too. Very frustrating!!!

[@lmsdiy]

You are so correct. The first time I replaced them, almost all of them were leaking within a year. This was actually the second time I did it.
2 of the seals in the rear bank are leaking again. The one in the middle (rear) and the three in the front bank are fine.
I’m going to take it apart again to inspect. I wonder if I need to hammer them in a bit (new tube seals) further so the top of the metal tubes leading from the spark plugs aren’t pushing into the rubber as much?

[@HH-gn9qt]

@@lmsdiyI think you maybe onto something with the depth of the seals. I believe the original seals from the factory were driven past flush with the valve cover hole. I believe if they are flush with the valve cover hole, it leaves a couple MM before bottoming out in the hole. This means the top of the tube must pass a couple MM through the seal and perhaps the seal is just meant to touch the top of the tube. I originally thought the tube passing through the hole was better, but I saw a diagram in the service manual that looked like the seal was just touching the top of the tube. Thanks for replying. I think now I am going to try to get the seal driven all the way down in the hole and see how it goes.

[@lmsdiy]

@@HH-gn9qt me too! Just need to order new tube seals and wait for the weather to warm up here!

[@lmsdiy]

@@HH-gn9qt if you get to this before me please let me know how it goes. I won’t be able to tackle that one until spring time here.

[@HH-gn9qt]

@@lmsdiyBeing here in CA, I should be able to get to it this weekend or next (plus being the 3rd time pulling valve covers, let's just say I am learning the process well.) I feel a bit energized now since it may just be a matter of installing the seals deeper and not my technique of how I install the cover. I will definitely post here with the results. I think you are in CAnada. Whereabouts?