2000 Civic spark plug

Question:

- Hide quoted text — Show quoted text -> Hi group, >  I replaced the spark plug of my 2000 civic with DENSO: KJ16CR-L11 >  spark plugs. I forgot to adjust the spark plug gap and fitted the >  spark plugs as I got it. > Leave them alone. They’re already pregapped to 1.1mm (.040"), which is what > the "L11" means. > I can’t find what Denso’s codes mean, but if they’re platinum or > iridium coated, gapping the is a bad idea. The plating is thin > and easily damaged by forcing a gapping tool between the elctrodes.

While using a gapping tool on a platinum plug isn’t recommended, I find that the platinum points on a Denso plug are rather thick and durable. > Spark plugs are made to tolerances down to a thousandth of an > inch. Why does everybody figure the makers suddenly got sloppy > with one single dimension? The only way the gap is going to be > off by any meaningful amount is if the plug gets dropped with > the protective cap removed.

The manufacturer’s typically recommend that the gap be checked before installation except for platinum/iridium plugs.  They warn against it, but have regapping instructions which state that a round gapping tool should not be used. <http://densoiridium.com/installationguide.php> BTW – Denso now makes a single-tip Iridium plug called "Iridium Power".  It’s their standard U-groove ground electrode with an iridium center electrode.  They still have their "long-life" iridium plugs.

Response:

Thanks a lot TeGGer and everybody. That helped a lot, SB

– Hide quoted text — Show quoted text -> Hi group, >  I replaced the spark plug of my 2000 civic with DENSO: KJ16CR-L11 >  spark plugs. I forgot to adjust the spark plug gap and fitted the >  spark plugs as I got it. > Leave them alone. They’re already pregapped to 1.1mm (.040"), which is what > the "L11" means. > I can’t find what Denso’s codes mean, but if they’re platinum or iridium > coated, gapping the is a bad idea. The plating is thin and easily damaged > by forcing a gapping tool between the elctrodes. > Spark plugs are made to tolerances down to a thousandth of an inch. Why > does everybody figure the makers suddenly got sloppy with one single > dimension? The only way the gap is going to be off by any meaningful amount > is if the plug gets dropped with the protective cap removed. > — > TeGGeR

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