Spark Plugs suggestions for 2011 Sonata -s : | platizazvonok.ru
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post #1 of 23 (permalink) Old 09-12-2017, 08:07 PM Thread Starter
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Spark Plugs suggestions for 2011 Sonata

Anyone willing to share ideas and suggestions for replacement Spark Plugs for my 2011 Sonata Limited?

120,xxx miles (has a factory new engine swap at 118,xxx miles and they put the old plugs back in.

Do I go with the dealer parts (heard they have made some changes and vendors) or do I pick my own??
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post #2 of 23 (permalink) Old 09-12-2017, 08:16 PM
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1 - You say you had engine replacement via the 132 / 162 recall ??

If the answer is yes,,,,,,,,,,,,,, the replacement long block comes with 4 new spark plugs already installed... somebody owe you a set of plugs..

If you had engine replacement,, look at your invoice - receipt....... what is the part number / description of engine used

Got VIN,, message VIN to me with what it for in subject line


Plugs,, use the NGK Iridium Laser (OE plug)..... if Turbo, there been a change in plug used

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post #3 of 23 (permalink) Old 09-12-2017, 08:22 PM
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Quote:
Originally Posted by Jeremiah Young View Post
Anyone willing to share ideas and suggestions for replacement Spark Plugs for my 2011 Sonata Limited?



120,xxx miles (has a factory new engine swap at 118,xxx miles and they put the old plugs back in.



Do I go with the dealer parts (heard they have made some changes and vendors) or do I pick my own??


Just go get some at Autozone. Why pay a lot something you can get the identical item for half.

Personally I think putting old plugs like that back on is pure &$T. Right up there with twice annually rotating the tires as an excuse for garbage tires and grape caliper cleaning. That crap isn't just Hyundai though. A friend of mine just told me Honda pulled the same numbers on him.


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post #4 of 23 (permalink) Old 09-12-2017, 10:10 PM
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Quote:
Originally Posted by sbr711 View Post
1 - You say you had engine replacement via the 132 / 162 recall ??

If the answer is yes,,,,,,,,,,,,,, the replacement long block comes with 4 new spark plugs already installed... somebody owe you a set of plugs..

If you had engine replacement,, look at your invoice - receipt....... what is the part number / description of engine used

Got VIN,, message VIN to me with what it for in subject line


Plugs,, use the NGK Iridium Laser (OE plug)..... if Turbo, there been a change in plug used


I thought Denso plugs were OEM.


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post #5 of 23 (permalink) Old 09-13-2017, 12:01 AM
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Car: Sonata GLS 2011 2.4
OEM spark plugs: Denso FXU16HR11
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post #6 of 23 (permalink) Old 09-13-2017, 12:41 AM
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Why in the F%$K would they put old plugs back into a new block? Can you verify that?
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post #7 of 23 (permalink) Old 09-13-2017, 01:03 AM
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Listen to SBR, he knows what he's talking about.

The 2.0T model came with Denso 20's then 22's then both were retired for a new custom NGK plug. You can't buy this plug in an autoparts store since it's specifically made for Hyundai/Kia for the YF/K5 2.0T. Infact if you call NGK they will tell you they don't make a plug for our application. Some of us use the Autolite plugs, but most of us tuned guys use the HKS plugs for their durability. Though if you're stock it's best to use the recommended OEM plug.

The part number for the 2.0T plug is H/K:18849-09085 with "SILZKR8E9G" on the side of the plug. Should come pregapped at .028 as well. You can get them for about $75 shipped from Korea. Though as SBR stated, the new block comes with new plugs already installed. Check to see if they are NGK or Denso and report back.
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post #8 of 23 (permalink) Old 09-14-2017, 06:54 PM
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Quote:
Originally Posted by C4RN1 View Post
Listen to SBR, he knows what he's talking about.

The 2.0T model came with Denso 20's then 22's then both were retired for a new custom NGK plug. You can't buy this plug in an autoparts store since it's specifically made for Hyundai/Kia for the YF/K5 2.0T. Infact if you call NGK they will tell you they don't make a plug for our application. Some of us use the Autolite plugs, but most of us tuned guys use the HKS plugs for their durability. Though if you're stock it's best to use the recommended OEM plug.

The part number for the 2.0T plug is H/K:18849-09085 with "SILZKR8E9G" on the side of the plug. Should come pregapped at .028 as well. You can get them for about $75 shipped from Korea. Though as SBR stated, the new block comes with new plugs already installed. Check to see if they are NGK or Denso and report back.
Quick question: Did the 2.4's also get moved over from Denso to the NGK plugs?

2013 Sonata GLS 48K miles
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post #9 of 23 (permalink) Old 09-14-2017, 08:14 PM
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I doubt that a dealer would put old plugs into a new engine, especially when engine comes with new plugs.

For the 2.4
possibly cheaper on Amazon and Ebay. Champion and Autolite also available.

Anyone wonder why they switched plugs on the 2.0T...
I guess it has a plug eating tendency. Colder plug might survive the heat/LSPI/detonation of those 87 octane turbo users.
HKS plug is definitely a cold plug.... if 20 was too hot, and 22 was the improved range.... HKS 45xl is equivalent to a Denso 27! I understand the extra power from chip/ecu tuning will keep 'em plugs warm, but do you really need to go that cool? BTW, HKS is iridium/platinum so its a high quality plug. I wonder which plug manufacturer makes it for HKS and would think that a 40xl is cool enough, especially for northern climates.

The "8" heat range of the Hyundai 2.0T NGK plugs is equivalent to a Denso 24.... and are supposedly Hyundai priced marked up NGK 1422.

Narrow 2.0T plug gap and cold plug tell a story... Hyundai must have a problem with get the spark strong enough to get the fuel ignited... and to prevent the spark plug from turning into a "glow plug", Hyundai is trying very hard to keep the plug very cool to avoid detonation. Cool plug might be a tad hard to start in the winter, and might not keep the plugs clean if burning oil or running rich. I guess short life plug change interval is good prevention.

The 2.0T still has a short life and quicker plug burning out tendencies than the 2.4GDI, which has a nice wide plug gap and toasty heat range of 16 along with a longl lifetime.

If Hyundai can't get the spark plug right, makes you wonder what else they can't get right. Overly hot plug is another reason why I recommend synthetic 5w40 and premium fuel for the turbo engines. Stout oil to prevent consumption and quality fuel to reduce detonation tendencies.
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post #10 of 23 (permalink) Old 09-14-2017, 08:30 PM
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I thought I heard one cylinder was giving them fits. Maybe one getting cooked by the turbo, so they went colder and then colder again. The poor guys are really flailing. Maybe TVs or refrigerators or something...
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