Aren't the Denso plugs the original OEM parts, but have been changed twice? I would avoid them, which helps save some $$.

These are the ones I got for my 45K swap on my '14 2.0T:

https://www.ebay.com/itm/PLUG-ASSY-...S-HYUNDAI-Sonata-KIA-Optiam/302758829195?hash=item467dd51c8b:g:cjwAAOSwvcJZ5rPv

 

Sorry, my responses are for the 2.0T. Looks like for yours, denso may still be the OEM:

Ebay can get you them ~$12.60 a piece

 

I don't think there is an exact NGK replacement for the 2.4...sorry for wasting your time! :blush:

 

As per our PM. Get the Denso ones I linked you to. Or go to the dealer and get the dealer boxed Denso plugs. Same thing.

 

Since I have Toyotas, I find that either is a good choice.


I tried Bosch, I gave up on Camps a LONG time ago in foreign cars, and I keep going back to Densos or NGKs.

 

The rest of the ignition system is designed with these plugs in mind. Using another plug with different characteristics could have negative effects.



In terms of quality, NGK Laser Series Plugs (which Nissan uses) go for the same price. But NGK does not have an official listing for our application (2.4)

 

The rest of the ignition system is designed with these plugs in mind. Using another plug with different characteristics could have negative effects.

Could you quote a test that backs this up?

 

My question is about the 'system being designed with these plugs in mind'


I have used the search function. I cannot find a link that answers this question. I see lots of opinions about 'this make is better than that make', NOT about the design of the system.


My question stands.


Can you assist? or are you just preaching your preference?

 

My question is about the 'system being designed with these plugs in mind'


I have used the search function. I cannot find a link that answers this question. I see lots of opinions about 'this make is better than that make', NOT about the design of the system.


My question stands.


Can you assist? or are you just preaching your preference?

No just to lazy to pull everything up. Quick thing to think about. Why so many part numbers for plugs? Different metals offer different characteristics. Different heat ranges. Contact denso or ngk and get technical specs on a coil from a Hyundai and compare it to a Nissan Toyota volkswagen. To test a coil via ohm resistance they have different test values ? Different pinouts. Different amount of pins. Look up the different types of ignition systems. See if your local college offers an automotive theroy class in regards to engine systems.

Just Google "theory of automotive ignition systems". Then after that Google specifics. Like specific types. Resistance/ voltage output....etc

My answer to which plug should be used is narrowed down by a parts catalogue lookup. And the other two options were champion and another brand. Both were not iridium like the oem plug. For this application I wouldn't put anything else in except the desno.

 

I prefer the Denso twin tip iridium plugs. Beware as NGK and Denso use opposite heat range numbers.

 

Is this too good to be true? You do have to wait 2 weeks!

https://tinyurl.com/yazekmkb

I did notice none of the reviews pertain to this particular plug!

 

Sorry for quoting myself, but I have noticed 2 sets have been sold on this site. Please let us know your experience if you have bought these plugs. Thanks!

 

I agree with old’s cool. No specific imperical data, just four decades of working on cars. Even though Mr Champion the car racer helped create the spark plug, I’ve never had great luck with them. Even had the platinum tip fall off a six month old plug.

Bosch are fine on German cars which I drove at one time.

AC delco I believe are owned by NGK for a few years now, have used them without issues on Hyundai cars for high mileage.


Spark plugs are like tires, difficult head to head comparison sometimes.

My 2 cents.

 

I would never have guessed that from your avatar...>

 

YF Turbo come with DENSO,, and last handfull replacement I done was with NGK per part number call out.. regular 2.4 still comes as DENSO replacement..


Myself, I been using NGK plugs in my stuff in past

 

Spark plugs from any manufacture can fail due to incorrect fitment procedures or selecting the incorrect heat range and in some cases may have a manufacturing defect.

Unfortunately this can lead a person condemning the plug manufacture forever. Having worked in the trade and having contact with many in the trade, I have known Lucas, Bosch, NGK, Denso, AC Delco, Champion and Ford branded spark plugs to have similar levels of performance and reliability.

It is vital to select the correct type of spark plug for the application. However some manufactures call up a particular plug based on emissions requirements, an example is Volvo and there would be others that require a two, three or four grounded electrode plug. In the case of Volvo, this caused warm engine starts issues and was only solved when a single ground electrode plugs where installed.

Fitment of any brand single ground electrode solved the issue and the spark plug manufacturers provide the correct cross reference.

Selecting a spark plug brand is very like choosing oil and filters, everyone has a view but in all cases choose wisely.

 

I just installed a set of Autolite Iridium XP's in my 2.4GDI. They work perfectly.
I couldn't find the Bosch or Champion equivalent plugs locally.

Best Spark Plugs, Iridium Plugs, Platinum Spark Plugs & Glow Plug Sets

https://www.boschautoparts.com/en/auto/spark-plugs/double-iridium-spark-plugs?partId=9622

Federal-Mogul Motorparts

I don't find the Hyundai/Kia's that I've owned to be plug picky.

 

Hello all, my first post here.


Just want to mention spark plug reach is important, that is, where the spark gap is positioned in the combustion chamber.
That can have a profound effect on flame propagation, especially with GDI that may use charge stratification.

 

Running the OEM NGKs ( revision 3) for past year. So far, so good. Shipped for $60 from Korea, was a 20 min job. At first change at 45K, had put in the Denso (revision 2).

 

So I have a question... I have a 14 2.0t and currently running NGK 1422 plugs. I had the Denso 22's in there before. Everyone says that power output is more and mpgs are a little better. My daily commute is about 90 percent highway and with the 22's, I got better fuel economy. I have taken the NGK plugs out twice and checked them and they look slightly sooty, but nothing crazy. Should I get some more 22's and put them back in? I rarely drive hard and with the commute it's a lot of light throttle. The 1422's were checked to be gapped at 0.28 (may be missing a 0 in there somewhere). What do you guys think?

 

If your using the newest recommended heat range plugs for the 2.0T the factory gap is .031-.035 or 0.8-0.9mm

Ive only used the OEM NGK, from the dealer they are expensive but can be found on EBay for less than $19 each

Pardon Our Interruption...

or online Dealer

2011-2019 Hyundai Spark Plug 18849-09085 | OEM Parts Online

2011-2019 Hyundai Spark Plug 18849-09085

www.hyundaioemparts.com

They have made 3 changes I think on the 2.0T original were Denso, then NGK Hyundai #18849-09075 now newest part number is #18849-09085

 

If your using the newest recommended heat range plugs for the 2.0T the factory gap is .031-.035 or 0.8-0.9mm

Ive only used the OEM NGK, from the dealer they are expensive but can be found on EBay for less than $19 each

Pardon Our Interruption...

or online Dealer

2011-2019 Hyundai Spark Plug 18849-09085 | OEM Parts Online

2011-2019 Hyundai Spark Plug 18849-09085

www.hyundaioemparts.com

They have made 3 changes I think on the 2.0T original were Denso, then NGK Hyundai #18849-09075 now newest part number is #18849-09085

Where did you get the info on gap for the sonata 2.0t? And is the gap different for Optima vs Sonata?