s2000maniac

Honda has 2 part numbers for OEM plugs one is DENSO and the other NGK.

redlineracing

I've heard of many cars that the tips broke off on the Denso plugs.I don't know what is best ( no one does!),but my 03S w/80k miles has liked the NGK Copper V groove plugs for a long time.

They are good,cheap and last about 20k miles.Since changing plugs is a 30min job....why not.

I run the BKR7E.Gap@44

\rlr
carolina

haywoodjablome

WRONG!!!! The S2000 has NEVER come from the factory with Iridium plugs. Go look at your owners manual and at the FAQs in these forums.
It's common knowledge the Ir plugs work for a short time and then produce a high rpm miss that doesn't throw a code. Go do your homework and you'll know what others are " talking about".

BTW, the Denso platinum plug was the predominant plug in the first S2000s produced and most are still running with them without issue. Honda only updated them with SS crush rings. They remained platinum. They did the same with the NGK platinums.

zeroptzero

those are aftermarket iridium plugs, not the factory Denso Plats. The factory Denso plats are fine. The aftermarket Denso Iridiums use the thinnest center electrode of any plug in the world, and they have had issues with the electrodes breaking off due them being more fragile due to being very thin diameter. I run NGK Iridiums which use a thicker center electrode and are stronger, much lke CHampion Iridiums, and a couple others. I would not run Denso Iridiums personally, some of their problems also come from people trying the gap them and weakening the electrodes even further when compounded with super thin/ fragile electrodes.

I don't know what caused your problems, but I still would not run Denso Iridium plugs in my engines. I would assume your coil is pooched too, perhaps the sparkplug loosened up after installation, allowed combustion gasses to blow up into the coil and the carbon finally killed the sparkability. I'd bet money on that being the cause, since you did not see oil seepage in the tubes.

User 62123

WRONG!!!! The S2000 has NEVER come from the factory with Iridium plugs. Go look at your owners manual and at the FAQs in these forums.
It's common knowledge the Ir plugs work for a short time and then produce a high rpm miss that doesn't throw a code. Go do your homework and you'll know what others are " talking about".

BTW, the Denso platinum plug was the predominant plug in the first S2000s produced and most are still running with them without issue. Honda only updated them with SS crush rings. They remained platinum. They did the same with the NGK platinums.
[/quote]

Well...just to chime in on the mis-information. My '07 S2k came to me with 18 miles on the clock and when I first changed the plugs they were NGK iridium's according to the part number on the plugs. So it seems doing homework before getting all CAPS and angry is important all around. I've had a generally bad experience with the Denso's (electrode related) and am back on NGK iridium's and the car runs strong with no high rpm miss according to multiple datalogs...but hey, maybe it won't show up until well after the 10k miles I have on them.

dc2-2-ap1

I guess I was mistaken- i just checked the service manual and it does not call for an iridium plug, it calls for a double platinum. The Honda dealership that I used to buy my parts from always sold me ngk iridiums.

haywoodjablome

WRONG!!!! The S2000 has NEVER come from the factory with Iridium plugs. Go look at your owners manual and at the FAQs in these forums.
It's common knowledge the Ir plugs work for a short time and then produce a high rpm miss that doesn't throw a code. Go do your homework and you'll know what others are " talking about".

BTW, the Denso platinum plug was the predominant plug in the first S2000s produced and most are still running with them without issue. Honda only updated them with SS crush rings. They remained platinum. They did the same with the NGK platinums.
[/quote]

Well...just to chime in on the mis-information. My '07 S2k came to me with 18 miles on the clock and when I first changed the plugs they were NGK iridium's according to the part number on the plugs. So it seems doing homework before getting all CAPS and angry is important all around. I've had a generally bad experience with the Denso's (electrode related) and am back on NGK iridium's and the car runs strong with no high rpm miss according to multiple datalogs...but hey, maybe it won't show up until well after the 10k miles I have on them.
[/quote]
Go read your owner's manual. What does it tell you is the correct part number for the plugs on your year of car? If you got IR plugs when you got it from the dealer, then someone there changed them before you got the car. I call BS on that one.
The kind of miss you get with IR plugs don't show up for 6 to 12 months. It won't throw codes so it won't show up on any data logger. It's something you feel and hear. But hey, if you're happy with a miss your data doesn't show, then carry on.
Additionally, it was mainly IR plugs that the occasional tip would break off.
"Misinformation"? Not on my part.