I'm looking at the manual and it calls for NGK DILZKAR7C11S but doesn't list any gap specs. Is there a spec for the gap or do I install it as-is?

 

That's a good question.

Since a particular spark plug could be used on dozens of different engines made by a dozen manufacturers it is quite likely that there will be different spark gaps specified depending on the different engine characteristics. So I would guess that Honda does have a specific gap required and you will have to re-gap the plug to match (unless you get lucky and it just happened to come from the factory with your number).

And yeah, Honda doesn't seem to tell us what that gap should be or what the torque setting is when tightening the plug back into the engine block. At least no where that I can see off hand.

Look for YouTube videos on doing a spark plug change for your particular car year. Find more than one because sometimes the info on these videos can be wrong , or just lacking in some details.

 

Theoretically they are pre-gapped, BUT unless you are using the exact same OEM plug number, that gap could be incorrect. I always check the gap on any new plug and re-gap as necessary.

 

I always check gap. Just be very careful with these Iridium plugs. A standard wheel style plug gap tool can break off the tip. Do not pry even the slightest bit against the tip.

Looking at Rock Auto, the factory gap is probably .044. If it were my car, I'd go with the Denso TT option for a third of the price.

 

Good point. You want to use the lever-type adjuster.
Always gap new plugs. It's just what you do.
If nothing else you practice your measurement technique.

 

Here is spark plug spec for 2015 Fit

 

I've always gapped all my plugs regardless if they are pre-gapped. If they are "non-gappable", like Denso Iridiums, I just use pliers to gentle pull the 'prong' (?) to increase gap, and gentle tap it to decrease.

 

spark plug torque

2015 Honda Fit

 

I'd sure check the gap before the install. Many plugs are correct, but some times they need a gentle tweak.

 

Thanks. More helpful than Google. I just installed oem ngk plugs and set the gap to .040, cross checked against two gap tools. The ones that came out were well below .039...I just got this car 2017 model with 28k miles and am replacing things so I know exactly when they were done. Oem hitachi coils should be here on Monday. Btw I torqued the plugs to 13-16lbft accounting for a small variance, the wrench was set to about 15.