M37 Spark Plug Change

[ArmedAviator]

I just ordered my Denso spark plugs as listed in the service manual. They arrive tomorrow and will probably tackle this job Wednesday.

I've changed spark plugs a few times before, but never on a Nissan/Infiniti. Anything special I need to note? Also, do these require the washers on the plugs or not?

IIRC, the book says 0.046" gap, correct? I've never played with the Iridium plugs - are they able to be gapped easily without breaking?

[PostalsQ]

So are they the original plugs? How many miles on the original? I saw 93k in your signature?

[ssmrico]

part #? im at 93k already want to change them soon

[Ilya]

I listed the part numbers for both the V6 and V8 in another thread here if you look around...or go to the FSM (where I got them) and use those.

[ArmedAviator]

part #? im at 93k already want to change them soon

post6693985.html#p6694425

For the M37: Denso FXE24HR11

I ordered 6 off of Amazon Prime for about $70.

So are they the original plugs? How many miles on the original? I saw 93k in your signature?

I assume these are the original plugs from the factory. Right now, I'm just shy of 95k miles.

[ssmrico]

thx I think ill order some now

[PostalsQ]

Not bad mileage considering their the original set. I think most makers are having plugs last in the neighborhood of 100k miles. Just curious cause I was looking at a better plug to change out to. I'm shy of 44k right now. So no real hurry to get them this moment. But would like the best efficient plug around.

[ArmedAviator]

Got them changed and the throttle bodies cleaned up today. Went smoothly and took about 2 hours, give or take for beer breaks.

All of my plugs came gapped at .043-.044". I stupidly dropped one and had to regap it, but the rest I left as-is. Torqued to 14 ft-lbs. Works like a charm. No noticable change in performance/economy and I suspect there won't be any. The original plugs were all still gapped at .043" with no noticeable wear or other issues.

[ssmrico]

nice