Spark plug part numbers and gap size?

[nadrojcote]

Does anyone know the part number for spark plugs on a 2014 5.3l? I am going to replace mine and would also need the gap size info.

[newdude]

Owners manual has the part#... 12622441.

 

Plug gap is 0.037–0.043 in. The OEM plugs come pre-gapped (most likely at .040 in).

[nadrojcote]

Thanks I didn't even think to check the owners manual, I figured they would be in the service manual.

[Crf450r420]

There is a coating on the factory iridium plus you mess up if you gap them so don't

[07Softail]

There is a coating on the factory iridium plus you mess up if you gap them so don't

If you gap plugs properly you won't disturb the Iridium on the center and ground electrode. Key is PROPER! And if you don't know how... do some research.

 

RT

[Spurshot]

I'm curious why you are changing plugs. Have you already reached the recommended interval? Or is there a problem?

[redwngr]

I'm curious about the reason for change as well.

[Crf450r420]

The coating is on the ground strap so there is no way to gap it without messing it up. The Iridium tip lasts because of the metal the coating is so the rest of the plug lasts the 100,000 miles.

[07Softail]

The coating is on the ground strap so there is no way to gap it without messing it up. The Iridium tip lasts because of the metal the coating is so the rest of the plug lasts the 100,000 miles.

BS! Let me guess you probably pry between the Ground Strap and The Center electrode if so that is incorrect!!

 

RT

[Spurshot]

I found this on Denso plugs. Couldn't find any specific info on the ACD iridium plugs about gapping them. But the Vette forum guys all gap them.

 

[07Softail]

I found this on Denso plugs. Couldn't find any specific info on the ACD iridium plugs about gapping them. But the Vette forum guys all gap them.

 

Thanks...This is the correct way! I have an Old AC gap tool that has a notch cut out on the end for bending the grounding electrode loose or tight which is the PROPER way of gaping plugs...way before all of these fancy plugs came out.

 

RT

[Crf450r420]

I'm going off our GM parts vender, but maybe his years of experiance are wrong. He is good guy and know his shuff, not that he can't be wrong. However he is not with out experiance. Not like GM tells them everything so they all learn it a little at a time.

[Spurshot]

I wouldn't use one of these to open the gap.

 

 

Nor one of these to close it.

[Crf450r420]

I'd love to have one of those jacobs gappers for testing and racing with full straps. The disk is a joke, right?

[nadrojcote]

I have 74,000km and my previous vehicles recommended changining after 100,000. I like to do maintenance before it's recommended. Plus, then I can share my experience with other.