Spark plugs at 32,715 miles. How do they look?

[nthach]

I never used Autolites in anything I touched - but their Iridium XPs seem like a decent aftermarket plug if you can’t get OEM.

Yura was the Korean affiliate of Champion and Beru - both brands of Driv Automotive(Federal-Mogul and Cooper Automotive). That explains why the OEM plugs look like a Champion. Before Hyundai started vertical integration a la Toyota(though Denso and Aisin were de-integrated), Mitsubishi and Bosch set up Korean affiliates when the Korean auto industry was getting off the ground.

recently, Toyota said plugs are good for 60K in a (T)GDI application. Previously, an Ir/Pt plug can go 100K before a change is needed.

 

[pitpndlm]

I have a 2012, I believe it is the same engine, My mother in law used to own the car, and in 8 years put 20k miles on. She wasn't mechanically inclined, so she drove it to the store, church, and the occasional social event. I don't know if she ever went over 55. When we got the car after she passed, I went through it and checked it over, and when I took it on the highway and really hit it hard it looked like a diesel truck behind it. Had the fuel system serviced and changed the plugs as they were somewhat carbon fouled. I believe I used Bosch. The coils can be a problem, since then I've had to replace 2 but they are extra ordinally easy to do (You can do all 4 in 30 min in the driveway start to finish). My brother is a Hyundai mechanic and said due to the car being outside in northern Wisconsin (-40) and the intermittent driving schedule it takes a toll on them. He explained the off brands are about 90% as good, the factory coils were better primarily due to the testing schedule thy had to do to qualify. If you have the time and money I recommend the factory, but there may not be a discernable difference and it may just be a piece of mind thing for me as they were factory certified.

 

[MONKEYMAN]

My engine is a little different. In 2017 they put a 2.0 Atkinson in the Elantra. Great gas mileage on the highway. Regarding coils the OEM one I bought on Ebay is just in case of one of the coils goes bad. I found out I do have the newer design coils listed in Hyundai's TSB so maybe I will be fine. It is good to know OEM is the way to go if needed. Here is the TSB on the coils.

 

[DGXR]

TSB is on the coils. They fail randomly. Plugs is from forum members reporting poor running conditions caused by the plugs or early failure. It happened to a retired Auto engineer. So he gave great detail in what he saw and followed with great reports of how the Autolites performed. I am pretty incompetent with repairs done is a rush (dyslexia). I tend to break things or mix things up. So I choose to change spark plugs early due to the bad rap they have on my own time schedule. It taught me what I need to do to change a coil. Now I could change a coil in 5 minutes without breaking anything. I am happy to report throttle response is improved. I used to have a lag at times. That is gone. Very happy with my choice to change early.

I understand a little better now, thanks for the additional info. In your situation I would probably change early too, just so I'm not pressed to change them in a roadside environment where I might mix things up. Do them in your own time, at your pace and at your convenience, even if a little early.

 

[zzyzzx]

Spark plugs need changing at 33K miles now???

 

[MONKEYMAN]

Spark plugs need changing at 33K miles now???

Just the ones I removed. The ones I put in 100k plus. I would like to test the plugs I removed. I am thinking the deposits on 3 plugs means combustion was not as complete as it could be. I am noticing a slight bump in power and gas mileage.

 

[Leroybrown]

Here's a spark plug from my '17 Elantra with 64k miles on them. They all looked the same. I swapped them out with Bosch 9686 Double Iridiums. The OE ones looked dirty to me, but I'm unfamiliar with Yura plugs so I don't have much in the way of comparison.

I just replaced the Yura plugs in my 2017 Kia Forte (same engine) at 39,500 miles. All 4 of them looked exactly like yours. They threads were dirty all the way up. It looks like they weren't torqued tight enough. I had the coils replaced under warranty last year after having some issues with misfiring.

NGK finally listed a plug for this engine recently which is # 90909. Napa lists them on their website but they aren't in stock locally yet. I ordered them from ngksparkplugs.com.

The car was running fine but Yura is an unknown brand. I found multiple reports of people having trouble with these Yura plugs in the process of looking for info about them. I feel more comfortable having replaced them with NGK.

 

[Car guy]

My cars manual states 32,000 mile plug change. I did it at 50,000 and they looked great still

 

[CKN]

they look worn out to me.

They are not any where close to being "worn out".

 

[paulo57509]

This is "worn out" (but still provided necessary ignition). The "V" in V-Power is almost gone.

Sorry for the poor resolution.

 

[MONKEYMAN]

The issue with Yura plugs is misfire or poor performance. That requires more than a visual inspection to determine if they are performing within spec.

 

[HankHill]

Like I'd replace them. You take em out, you replace. Nevermind the cost, just do it. The electrode looks flat and rounded at the sides. Just do it.

 

[Gillsy]

they look worn out to me.

+1 As the electrodes erode, they require a higher voltage to jump the gap. The gap can still be in spec, but the electrode no longer has good sharp square edges. That put strain on the coil packs. I would change them.