REVZ TO9

So I just ordered 4 new NGK OEM double platinum spark plugs from sparkplugs.com, and I was wondering if they come pre-gapped or do I need to do that myself? Ive never done that and am affraid to break them. If I do, any tips? Are they sensitive and easy to break when trying to gap them? Whats the rule of thumb when gapping them by how much?

iam7head

they are pregapped, but just to be sure check them before putting them on.

the teenager working min. wage could drop the set and i doubt he/she will gives a second look

Stratocaster

Actually from what I have been told, checking the gap will damage the coating on the electrode. It is stated in the Helms manual. So that means they ship gapped to spec.

REVZ TO9

oh thank god

cdelena

It seems to me that any coating that will holdup on an electrode will tolerate the touch of a measuring wire. Obviously rubbing and scraping the electrode is not good but that is not the proper way to check plug gap anyway.

I have never received plugs from any manufacturer for any car that were properly gapped. 'Close' is what they usually are.

RadioZero

and get some good "feeler" gauges, not the cheap .99 cent rotating coin looking gauge they sell on the counter at AutoZone. spend an extra buck or two and get either a feeler gauge or a wire gauge.

REVZ TO9

so if I do have to gap them myself or tell someone how to do it, what do I tell them? How do I know how much to gap them if any?

RadioZero

compliments of Xviper

check the FAQ!!

np2k1s2k

i just bought some OEM spark plugs from honda and all of them were gapped at .047 so they were not gapped propperly from manufacurer. The part numbers did match. So it's always better safe to check it.

smirfs2k05

Should be .040". Mine came pregapped but I still checked the gap. It says it will damage the electrode but if your careful it wont hurt a thing with the feeler gauge.