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Old 11-13-2011, 11:29 AM   #1 (permalink)
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Rob JS
Default Can Someone Confirm the Spark Plug Gap?

I am also having gas mileage issues and am about to check my plug gap. I am familiar with another thread in which Depeche93 indicated that the correct spark plug gap per Denso is 0.032 in. However hmaservice.com lists the correct gap for the 2011 2.0t GDI engine as 0.0394-0.0433 in. I wanted to call attention to this discrepancy because if these cars are coming out of the factory at 0.028 and should be around 0.040, that could result in a significant difference in performance. Also, if folks are checking their gaps and closing them down to 0.032, that might not be the correct thing to do either. What is the consensus? Thanks.
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Old 11-13-2011, 12:51 PM   #2 (permalink)
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I am also having gas mileage issues and am about to check my plug gap. I am familiar with another thread in which Depeche93 indicated that the correct spark plug gap per Denso is 0.032 in. However hmaservice.com lists the correct gap for the 2011 2.0t GDI engine as 0.0394-0.0433 in. I wanted to call attention to this discrepancy because if these cars are coming out of the factory at 0.028 and should be around 0.040, that could result in a significant difference in performance. Also, if folks are checking their gaps and closing them down to 0.032, that might not be the correct thing to do either. What is the consensus? Thanks.

Depeche93 indicated that his dealer showed him a TSB which lists correct gaps for the 2.0T. I am not aware of any TSB on this subject, so I posted a request that he show us the TSB. Hopefully Depeche93 will be able to post this soon.

Hal
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Old 11-13-2011, 01:49 PM   #3 (permalink)
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No such TSB exists for the YF Sonata, turbo or otherwise, on the HMA service site. The last TSB to discuss spark plug types and gaps in any detail dates to 2002. Aren't the gap guide lines listed in the back of the owner's manual?

The gap range of 0.0394"-0.0433" is the same given for the 2.0T engine in the QF Optima (2011-2012) on the KiaInfoTech website. The online version of the owner's manual is of no help.

Last edited by ken99; 11-13-2011 at 02:06 PM.
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Old 11-13-2011, 03:27 PM   #4 (permalink)
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No such TSB exists for the YF Sonata, turbo or otherwise, on the HMA service site. The last TSB to discuss spark plug types and gaps in any detail dates to 2002. Aren't the gap guide lines listed in the back of the owner's manual?

The gap range of 0.0394"-0.0433" is the same given for the 2.0T engine in the QF Optima (2011-2012) on the KiaInfoTech website. The online version of the owner's manual is of no help.
I'm certain Depeche93 was mistaken. I called the consumer affairs 800 number for Hyundai, and there is no TSB for 2.0T spark plugs. We can put that issue to bed.

Ken99, the Sonata manual does not list spark plug gaps. However, hmaservice.com provides that information.

So Rob JS, you are asking what people are doing about plug gaps. Here's my answer: nothing. My Turbo engine is running great and my MPG's are nominal. At this point, I have no reason to re-gap my spark plugs.

Hal
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Old 11-13-2011, 06:51 PM   #5 (permalink)
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5.Check the electrode gap (A).
Standard
Unleaded : 1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.)


I like the "unleaded" part... who is going to build a car with catalytic converters and tell you to use leaded fuel.. seems to me unleaded and catalyst come along some 30+ yr ago when leaded fuel went away..

Of course you can buy all the leaded race gas you want, but at $6.50+ per gallon..



Specifications
Ignition System
Items
Specifications
Ignition coil Primary resistance 0.62 10 % (Ω)
Secondary resistance 7.0 15 % (kΩ)

Spark plugs
Type
ZXU20HCR8

Gap
1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.)

Last edited by sbr711; 11-13-2011 at 06:55 PM.
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Old 11-13-2011, 08:33 PM   #6 (permalink)
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Originally Posted by New2011sonata View Post
I'm certain Depeche93 was mistaken. I called the consumer affairs 800 number for Hyundai, and there is no TSB for 2.0T spark plugs. We can put that issue to bed.

Ken99, the Sonata manual does not list spark plug gaps. However, hmaservice.com provides that information.

So Rob JS, you are asking what people are doing about plug gaps. Here's my answer: nothing. My Turbo engine is running great and my MPG's are nominal. At this point, I have no reason to re-gap my spark plugs.

Hal
Mine is running great as well and mileage is up where it should be. Im not even gonna look at em. Only got 15K on the engine.
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