Spark plug replacement 16 Kia Optima 2.0 T-GDI - Kia Forum
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post #1 of 8 (permalink) Old Yesterday, 05:10 PM Thread Starter
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Post Spark plug replacement 16 Kia Optima 2.0 T-GDI

Hi! I'm new to the forum. I need to replace my spark plugs at the 45 k mark, as per the owners manual.

I love my 2016 Optima Turbo, but not the dealers, since have had one too many errors happen and had to wait triple or quadruple the normal time for different jobs.

So, I'd like to get an independent mechanic to replace my spark plug with same or similar performance plug.

The Optima owner's manual just requires correct "heat range", but does not mention which that is. Plugs for my car at dealer are quoted at 30 each! (total $120). I've never heard of plugs being that expensive, unless they are some high performance ones.

I checked Denso online and they state that the Denso ZXU22HCR8 Iridium Long Life Plug, DEN3501, @ $12 (total $48) dollars each is appropriate for my car. That's a huge price difference ($70).

Can someone tell me if this Denso plug I mention is the appropriate plug or are there any worthwhile alternatives. Perhaps I'm looking at the wrong plug and that is why it is such a difference?

Also, I want to make sure that changing the spark plugs is a simple job, for anyone with the tools, without any tuning necessary (pull coils, remove plugs, place anti-seize, put coils on, start engine, verify it's running smoothly), so I need to know whether this spark plug replacement job requires anything beyond simply placing the plug. I'm getting quotes and some independent mechanics want to charge 150-200, for a job that I heard in less than an hour. That seems high. One hundred dollars for an hour of work is too much. Thanks.

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post #2 of 8 (permalink) Old Yesterday, 05:58 PM
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Originally Posted by Neumatropic View Post
Hi! I'm new to the forum. I need to replace my spark plugs at the 45 k mark, as per the owners manual.

I love my 2016 Optima Turbo, but not the dealers, since have had one too many errors happen and had to wait triple or quadruple the normal time for different jobs.

So, I'd like to get an independent mechanic to replace my spark plug with same or similar performance plug.

The Optima owner's manual just requires correct "heat range", but does not mention which that is. Plugs for my car at dealer are quoted at 30 each! (total $120). I've never heard of plugs being that expensive, unless they are some high performance ones.

I checked Denso online and they state that the Denso ZXU22HCR8 Iridium Long Life Plug, DEN3501, @ $12 (total $48) dollars each is appropriate for my car. That's a huge price difference ($70).

Can someone tell me if this Denso plug I mention is the appropriate plug or are there any worthwhile alternatives. Perhaps I'm looking at the wrong plug and that is why it is such a difference?

Also, I want to make sure that changing the spark plugs is a simple job, for anyone with the tools, without any tuning necessary (pull coils, remove plugs, place anti-seize, put coils on, start engine, verify it's running smoothly), so I need to know whether this spark plug replacement job requires anything beyond simply placing the plug. I'm getting quotes and some independent mechanics want to charge 150-200, for a job that I heard in less than an hour. That seems high. One hundred dollars for an hour of work is too much. Thanks.
https://www.kia-forums.com/4g-2016-2...gs-r-r-10.html

I think you'll find the answer in that thread.

I'm sure that you'll find that they're not Denso, but a special order NGK.
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Last edited by ron1004; Yesterday at 06:38 PM.
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post #3 of 8 (permalink) Old Yesterday, 06:26 PM
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You have the correct N/D plug number. I would advise you to stay with the N/D's I've tried another mfg' iridium plugs and had some minor driveability issues that were not there with the N/D's. The dealer prices are truly incredible, on Long Island they want $437.00 for that plug change. The plugs were just under $10.00, and with a cold motor it took 20 min's and some of that was cleaning off dust before doing the actual job. It is for sure one of the easiest plug changes I've ever done.
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post #4 of 8 (permalink) Old Yesterday, 10:49 PM Thread Starter
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Thank you very much for that helpful and complete information. If this is a special plug then I will make sure to get that one. I don't want to ruin my engine or warranty.

By the way, I hope that I didn't post this in the wrong place, since there seems to be a thread about it. I did try to search for that issue and couldn't find it.
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post #5 of 8 (permalink) Old Yesterday, 10:57 PM Thread Starter
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Thanks oldsport for your very prompt reply and insight on the time it takes!

Wow, Long Island prices are out of hand! (I was born there, by the way.)

The dealer here in Florida wants about $200 for the job, including the parts... of course they will add "shop charges", "disposal" , tax, etc. and everything you can imagine, if I let them ...haha.. :-(

But, seriously, I may just buy one plug directly at the dealership and just open the box to see what the plug says on it because if it is indeed a special plug as ron1004 states, I don't want to worse engine performance or risk warranty issues.
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post #6 of 8 (permalink) Old Today, 08:16 AM
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Those are the plugs that were in my 2.0t from the factory. Save yourself some money, if you are skeptical just remove one plug from your motor, check the number, and reinstall it temporarily until you purchase the replacements.
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post #7 of 8 (permalink) Old Today, 08:46 AM
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Correct plug, about $12.50 at rockauto.
If you can, learn how to change them yourself, get proper tools to do it. they are not expensive. The job isn't difficult.
Teach your kids how it's done.
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post #8 of 8 (permalink) Old Today, 10:01 AM
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Originally Posted by oldsport View Post
Those are the plugs that were in my 2.0t from the factory. Save yourself some money, if you are skeptical just remove one plug from your motor, check the number, and reinstall it temporarily until you purchase the replacements.
Have Fun
Good advice there.

I'd be surprised if it has different plugs to the Sportage with the same engine.

Also, to be safe make sure that Kia hasn't issued a TSB advising the custom ordered spark plugs seen in the Sportage.

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