Spark plugs on T33 KR15DDT?

[V6er]

Are there any known aftermarket spark plugs for T33 KR15DDT?
22401-6RC1E - original nissan part number
ILMAR8G8GS - ngk, but they don't offer them for general public.

Anyone has found alternatives?
What is torque for installing them? (I stumbled upon https://www.boschsparkplugs.net/boschs-numbering-system - will take out in our and measure spark plug to look in different manufacturer catalogs, but would like to put them back correctly)

[VStar650CL]

Torque is 9 lbs/ft. I don't see any aftermarket crosses either.

[VStar650CL]

PS - They told us in new model intros for the KR15 that the plugs are designed to seat in a certain electrode position at the set torque. I think they're probably just an LMAR8GI-8, but tweaked with a specific land position for the threads.

[V6er]

Just 9lbsft?! It seems awfully small torque…


Thanks for headsup - will note the thread location with electrode in mind(have heard that old 2v/cyl benefited if you could put opening of spark plug in certain position, but this seems really new )

[VStar650CL]

Just 9lbsft?! It seems awfully small torque…

Keep in mind that the plug is steel and the head isn't. Galvanic "stiction" is inevitable whenever different metals meet, as well as carbon buildup on any exposed threads. The last thing anyone wants is a spark plug seized in the hole, ask anybody who ever owned an early Triton. That happened as a result of the Tritons having among the first 100K mile spark plug service intervals, coupled with a plug design which intruded just a hair too far into the combustion chamber. Manufacturers since then have all become very circumspect about torque and design.

[V6er]

with 100kmiles interval for spark plugs... I kinda could understand people wanting to save money on maintenance... but I somehow feel that way too much "testing" is done on customer dime/time and others resources...

[VStar650CL]

Yes and no. In engineering (and I speak from rude experience here), it's never the big, dangerous alligators that eat your lunch. It's always the little foot-long bastards which you can't see coming that bite you in the butt. I'm sure Ford tested those Triton plugs extensively before making the 100K recommendation, and I'm sure that meant running lots of Tritons the equivalent of 100K miles. As an engineer, I'm also pretty sure the plugs were yanked periodically on all those test engines to make sure they were performing to standard. It probably never occurred to anyone that a combination of a new plug design along with not pulling the plugs periodically could inculcate a huge, past-warranty, reputation-damaging issue. In retrospect, we all know the teeth of that little gator sank squarely into Ford's butt. Not because they didn't test a lot, but because they didn't do the right tests.

Now, marketing is a different matter. The whole reason for Nissan's "lifetime fluid" CVT debacle wasn't driven by Nissan engineers, or even Jatco engineers. It was driven by an out-of-control Nissan marketing department, and it wasn't the first or last time the marketing cart ended up pushing around the engineering donkey at Nissan. It remains to be seen whether releasing your Rogue's (possibly rushed) KR15 engine into Nissan's largest market before trying it out in less critical markets proves to be another unforced error. I rather think it will, but time will tell.

[V6er]

you calmed me down and showed shiny and nice future... (shiny I mean - like CDL driver training "I don't see shiny threads on wheel bolts, this means they are torqued properly and not loose"......... )

anyway - will try to see about those plugs.

[D1dad]

I changed plugs in my 18 @80k and they looked great but those things were torqued from the factory. I didn’t use a torque wrench on the new ones, just tightened em till I felt them seat and a little more. 20k later and no issues. I did strip the pcv using my bear hand on a socket though. Just got it tight enough by hand and seems fine, plus the hose holds it in place so its not going anywhere.