Spark plug replacement in 3.3T engine at 40k miles?

[waz]

Reading through this forum prior to buying my '18 3.3T, I was surprised to see that the recommended service interval for the spark plugs was 42000 miles (100k for 5.0 liter).

Are these iridium plugs, and does anybody know why there's such a short replacement interval?

Have you had your plugs replaced by a dealer, and if so, how much did it cost?

If you DIY, how difficult is it to access the plugs?

 

[BadTrainDriver]

Yes, 40k is the service interval on the spark plugs.
Here is the best thread about changing them.

Spark Plug change tips

By now, if you are tuning and want to change your plugs, you probably ran across this video... Here are a couple of tips from an install on a friend's stinger. Driver's side is normal. Plenty of room to pull coils and plugs. You don't even have to disconnect the coils from their connectors...

stingerforum.org

 

[MEV]

I am sure it is related to the direct injection system and it being turbo. Turbos are intolerant of spark knock, even with knock sensors and computer control.

 

[bubbaG80Sport]

The spark plug replacement for the 2018 G80 Sport 3.3T is 42K miles for severe driving conditions. I spoke with local dealer and they do/recommend a plug change at 60K miles.

I pamper my 2018 G80 Sport 3.3T so at 40K miles this weekend I swapped the plugs. I have no mods and do not drive the car hard (ok once in a while maybe ).
- Replaced with factory/OEM NGK plugs. I could not find these in local parts store nor online and had to get from Genesis dealer (~$20.00 USD / per plug). Another dealer wanted ~2$7.00 USD.
- Gapped new plugs to 0.031" (lower end of manufacturer recommendation 0.0315->0.0354). Old plugs were about the same 0.031" gap.
- Old plugs looked fine with no black soot (running rich/too cool a plug) and not dark grey (too low a plug temperature range).
- Torqued new plugs to 25 N*M per NGK website.
- I did not remove the manifold. The passenger side/bank plugs were a bugger, but I just took my time (~2.5 hours). Passenger side plugs were a breeze ~30 minutes). I understand now why dealer wanted $425USD to swap plugs (not including plug cost).
- Used basic tools (ratchet, swivel, plug socket and an assortment of extensions). A wobble socket/attachment would have made the job a little easier.

Took a peak at one cylinder with a borescope. Piston top looked fine. Could not get a view of valves.

 

[EdP]

The spark plug replacement for the 2018 G80 Sport 3.3T is 42K miles for severe driving conditions. I spoke with local dealer and they do/recommend a plug change at 60K miles.

I pamper my 2018 G80 Sport 3.3T so at 40K miles this weekend I swapped the plugs. I have no mods and do not drive the car hard (ok once in a while maybe ).
- Replaced with factory/OEM NGK plugs. I could not find these in local parts store nor online and had to get from Genesis dealer (~$20.00 USD / per plug). Another dealer wanted ~2$7.00 USD.
- Gapped new plugs to 0.031" (lower end of manufacturer recommendation 0.0315->0.0354). Old plugs were about the same 0.031" gap.
- Old plugs looked fine with no black soot (running rich/too cool a plug) and not dark grey (too low a plug temperature range).
- Torqued new plugs to 25 N*M per NGK website.
- I did not remove the manifold. The passenger side/bank plugs were a bugger, but I just took my time (~2.5 hours). Passenger side plugs were a breeze ~30 minutes). I understand now why dealer wanted $425USD to swap plugs (not including plug cost).
- Used basic tools (ratchet, swivel, plug socket and an assortment of extensions). A wobble socket/attachment would have made the job a little easier.

Took a peak at one cylinder with a borescope. Piston top looked fine. Could not get a view of valves.

Progress in engine design. You could change the plugs on a Chevy in line six in about 15 minutes. Glad you could DIY, I don't any more.

 

[Light2000]

The spark plug replacement for the 2018 G80 Sport 3.3T is 42K miles for severe driving conditions. I spoke with local dealer and they do/recommend a plug change at 60K miles.

I pamper my 2018 G80 Sport 3.3T so at 40K miles this weekend I swapped the plugs. I have no mods and do not drive the car hard (ok once in a while maybe ).
- Replaced with factory/OEM NGK plugs. I could not find these in local parts store nor online and had to get from Genesis dealer (~$20.00 USD / per plug). Another dealer wanted ~2$7.00 USD.
- Gapped new plugs to 0.031" (lower end of manufacturer recommendation 0.0315->0.0354). Old plugs were about the same 0.031" gap.
- Old plugs looked fine with no black soot (running rich/too cool a plug) and not dark grey (too low a plug temperature range).
- Torqued new plugs to 25 N*M per NGK website.
- I did not remove the manifold. The passenger side/bank plugs were a bugger, but I just took my time (~2.5 hours). Passenger side plugs were a breeze ~30 minutes). I understand now why dealer wanted $425USD to swap plugs (not including plug cost).
- Used basic tools (ratchet, swivel, plug socket and an assortment of extensions). A wobble socket/attachment would have made the job a little easier.

Took a peak at one cylinder with a borescope. Piston top looked fine. Could not get a view of valves.

would you recommend this only be done at a dealer, or could the local chain shop do it just as well if I got them the oem plugs?

 

[bubbaG80Sport]

would you recommend this only be done at a dealer, or could the local chain shop do it just as well if I got them the oem plugs?

Small hands, patience and an assortment of socket wrench extensions and swivels is all that is needed. Any competent mechanic you trust can do this work. This work requires no special tools or training.

I would replace with the OEM plug. This is to avoid a warranty claim denial/debate in the event of future engine damage unrelated to the plug change.

 

[EdP]

would you recommend this only be done at a dealer, or could the local chain shop do it just as well if I got them the oem plugs?

Any good mechanic can do it. I prefer a reputable independent over a chain. Some good, others a crap shoot.

 

[waz]

The spark plug replacement for the 2018 G80 Sport 3.3T is 42K miles for severe driving conditions. I spoke with local dealer and they do/recommend a plug change at 60K miles.

Hey Bubba - what's the part number on the plugs you got, and how much did you pay the stealer for them?

NAPA says they've got this plug that fits the 3.3TT:

https://www.napaonline.com/en/search?text=spark%20plugs%203,3TT&referer=v2

(NGK 97976) but I want to make sure they will work before paying $102 for 6 of 'em.

 

[Light2000]

I paid the dealer $143 otd for 6 oem plugs. FYI.

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[Gravy]

I had mine replaced at the dealer (Kirkland Genesis) at 42k. They charged $25 per plug, forget how much for labor. Will never do that again, they are just rebranded NGK's - you can verify part numbers here. They are 20% off at NAPA now.

 

[jetrep]

It's not a tough job. Only one plug is somewhat difficult to access as it's concealed by the intake. The most difficult part of replacing that plug is removal and reinstallation of the coil. I bought my plugs from the kia dealer for a great price.
The plugs I removed were set to a gap much less than the suggested gap. Each plug also had a sharpie mark on the ceramic. I wonder if they were removed and re gapped at some point for the original owner.

 

[bubbaG80Sport]

Hey Bubba - what's the part number on the plugs you got, and how much did you pay the stealer for them?

NAPA says they've got this plug that fits the 3.3TT:

https://www.napaonline.com/en/search?text=spark%20plugs%203,3TT&referer=v2

(NGK 97976) but I want to make sure they will work before paying $102 for 6 of 'em.

I'll need to check my notes when I get home but recall NGK OEM plugs were about $25USD + local tax from stealer.

Spark plug part number for 2018 Genesis G80 Sport 3.3TSpark Plug is (18852-09070).
I just now got this information from www.hyundaioempartsdirect.com

​

 

[waz]

Well, after some hemming, hawing and procrastination, I changed the plugs on my 2018 G90 3.3TT on Sunday.

The car had 42,732 miles on it, and judging by the appearance the old plugs, it was definitely time for them to be changed. All 6 of them had some degree of discoloration on the ceramic core, eminating from where it joined the metal base. Although the car ran fine prior to changing the plugs, it looked like the spark was escaping at that joint and scorching the ceramic.

I bought the car with 23k miles on it, so I don't know if the previous owner had a very heavy foot or what, but the plugs were toast.

The process itself was very fiddly and a pain in butt, but I got 'er done. It took about 3 hours with me and a buddy working on it, but we ran into a variety of minor snags that took up time. Nothing I do ever goes as smoothly as it does on the YouTube videos.

The biggest PITA was getting a deep 5/8" socket out of the passenger side middle spark plug bore (the one under the intake plenum). The jointed spark plug socket I bought on Amazon for $10 was too floppy to effectively torque the plug, so I pulled it out and used a deep non-jointed socket and a swivel and extension to snug the plug. The problem came when I tried tried to pull the socket out of the bore and it pulled off of the extension.

When they say space for your hand is tight for that plug, they weren't kidding. 30 some minutes, and an impressive variety of Anglo-Saxon 4 letter words later, we got it out of there.

I bought 6 NGK 97976 SILZFR7A9G Laser Iridium plugs directly from NGK for $80 plus tax and shipping for a total of $90. I also purchased a set of swivels and wobble extensions from Harbor Freight, so I spent a total of about $110 to do the job.

Considering my local dealer wanted $635, I'm pretty pleased with myself.

As an added bonus, the car is much quieter at idle. It had a fairly loud valve rattle before I changed the plugs that has been reduced significantly.

All in all, my advice to you if you have a 3.3TT engine with the original plugs in it and more than 42,000 miles on the clock, suck it up and change the plugs.

 

[ajwklajdskla1]

Well, after some hemming, hawing and procrastination, I changed the plugs on my 2018 G90 3.3TT on Sunday.

The car had 42,732 miles on it, and judging by the appearance the old plugs, it was definitely time for them to be changed. All 6 of them had some degree of discoloration on the ceramic core, eminating from where it joined the metal base. Although the car ran fine prior to changing the plugs, it looked like the spark was escaping at that joint and scorching the ceramic.

I bought the car with 23k miles on it, so I don't know if the previous owner had a very heavy foot or what, but the plugs were toast.

The process itself was very fiddly and a pain in butt, but I got 'er done. It took about 3 hours with me and a buddy working on it, but we ran into a variety of minor snags that took up time. Nothing I do ever goes as smoothly as it does on the YouTube videos.

The biggest PITA was getting a deep 5/8" socket out of the passenger side middle spark plug bore (the one under the intake plenum). The jointed spark plug socket I bought on Amazon for $10 was too floppy to effectively torque the plug, so I pulled it out and used a deep non-jointed socket and a swivel and extension to snug the plug. The problem came when I tried tried to pull the socket out of the bore and it pulled off of the extension.

When they say space for your hand is tight for that plug, they weren't kidding. 30 some minutes, and an impressive variety of Anglo-Saxon 4 letter words later, we got it out of there.

I bought 6 NGK 97976 SILZFR7A9G Laser Iridium plugs directly from NGK for $80 plus tax and shipping for a total of $90. I also purchased a set of swivels and wobble extensions from Harbor Freight, so I spent a total of about $110 to do the job.

Considering my local dealer wanted $635, I'm pretty pleased with myself.

As an added bonus, the car is much quieter at idle. It had a fairly loud valve rattle before I changed the plugs that has been reduced significantly.

All in all, my advice to you if you have a 3.3TT engine with the original plugs in it and more than 42,000 miles on the clock, suck it up and change the plugs.

My 19 3.3T g70 has 44000 miles on it and was going to wait till i hit 45000 miles to replace my spark plugs but I guess i will do this this weekend. Already bought oem spark plugs from Rockauto each 10.89 for 6 spark plugs plus shipping 10$.

 

[jetrep]

My 19 3.3T g70 has 44000 miles on it and was going to wait till i hit 45000 miles to replace my spark plugs but I guess i will do this this weekend. Already bought oem spark plugs from Rockauto each 10.89 for 6 spark plugs plus shipping 10$.

Do you have a link for these oem plugs on Rock auto?

 

[Gravy]

Well, after some hemming, hawing and procrastination, I changed the plugs on my 2018 G90 3.3TT on Sunday.

The car had 42,732 miles on it, and judging by the appearance the old plugs, it was definitely time for them to be changed. All 6 of them had some degree of discoloration on the ceramic core, eminating from where it joined the metal base. Although the car ran fine prior to changing the plugs, it looked like the spark was escaping at that joint and scorching the ceramic.

I bought the car with 23k miles on it, so I don't know if the previous owner had a very heavy foot or what, but the plugs were toast.

The process itself was very fiddly and a pain in butt, but I got 'er done. It took about 3 hours with me and a buddy working on it, but we ran into a variety of minor snags that took up time. Nothing I do ever goes as smoothly as it does on the YouTube videos.

The biggest PITA was getting a deep 5/8" socket out of the passenger side middle spark plug bore (the one under the intake plenum). The jointed spark plug socket I bought on Amazon for $10 was too floppy to effectively torque the plug, so I pulled it out and used a deep non-jointed socket and a swivel and extension to snug the plug. The problem came when I tried tried to pull the socket out of the bore and it pulled off of the extension.

When they say space for your hand is tight for that plug, they weren't kidding. 30 some minutes, and an impressive variety of Anglo-Saxon 4 letter words later, we got it out of there.

I bought 6 NGK 97976 SILZFR7A9G Laser Iridium plugs directly from NGK for $80 plus tax and shipping for a total of $90. I also purchased a set of swivels and wobble extensions from Harbor Freight, so I spent a total of about $110 to do the job.

Considering my local dealer wanted $635, I'm pretty pleased with myself.

As an added bonus, the car is much quieter at idle. It had a fairly loud valve rattle before I changed the plugs that has been reduced significantly.

All in all, my advice to you if you have a 3.3TT engine with the original plugs in it and more than 42,000 miles on the clock, suck it up and change the plugs.

Great info and very helpful, thanks for posting.

 

[ajwklajdskla1]

Do you have a link for these oem plugs on Rock auto?

NGK 97976
I dont have computer on me right now to get the link but if you look up 2019 g70 3.3 and click ok spark plug under ignition, you can see it. Its the only one listed so u cant miss it

 

[waz]

"My 19 3.3T g70 has 44000 miles on it and was going to wait till i hit 45000 miles to replace my spark plugs but I guess i will do this this weekend. Already bought oem spark plugs from Rockauto each 10.89 for 6 spark plugs plus shipping 10$."

I looked on their website for future reference and found the plugs at that (very good) price, but the little box next to the "Add to Cart" icon that indicates the number you want to order only lets you choose packs of four (4,8,12, etc.). How did you order 6?

 

[ajwklajdskla1]

"My 19 3.3T g70 has 44000 miles on it and was going to wait till i hit 45000 miles to replace my spark plugs but I guess i will do this this weekend. Already bought oem spark plugs from Rockauto each 10.89 for 6 spark plugs plus shipping 10$."

I looked on their website for future reference and found the plugs at that (very good) price, but the little box next to the "Add to Cart" icon that indicates the number you want to order only lets you choose packs of four (4,8,12, etc.). How did you order 6?

I ordered it like a month ago at price of 10.79 each for 6.
But looks like now they only sell in a pack of four..