CX-5 NGK spark plugs 14mm or 9/16 and torque?

[CX5BC]

Hi,
Can some one please confirm the NGK spark plugs use 14mm or 9/16 socket. Does it matter which one? Also I don't have torque wrench, on YouTube looks like hand tight and another quarter turn, is this about right? Thanks.

 

[JimKJSVTCX-5]

14 mm thin wall deep socket. DO NOT use any plug but OEM. https://www.mazdas247.com/forum/index.php?threads/unnecessary-spark-plug-replacement.123864955/

 

[JimKJSVTCX-5]

2013~2016: - Skyactiv Spark Plug Question

Hello I would love to get confirmation from the group about the correct spark plugs for a 2014 Mazda CX-5 2.5 touring model. I have reviewed the forum over and over and it can be conflicting. From Mazda OE 1 spark plug is 30 bucks. However rock auto shows the NGK 94124 {#B2401HA00F...

www.mazdas247.com

 

[CX5_Driver]

and this thread:

2013~2016: - Anyone install Ruthenium Spark Plugs yet?

Hi All, I was wondering if anyone has tried out the Ruthenium plugs on Rock Auto? It's supposedly better than iridium and platinum. If anyone has them installed, would you mind comparing them to OEM? https://www.rockauto.com/en/moreinfo.php?pk=9779940&cc=3312788&jsn=1290&jsn=1290&jsn=1290...

www.mazdas247.com

@Digbicks1234 said:
Tools Required:

1. (4) Spark Plugs of your choice
2. Paper Towels: To clean of all of the crap/debris on top of the engine bay so that it doesn't get inside your ignition system.
3. 3/8 Drive Breaker Bar
4. 3/8 Drive Ratchet
5. 3/8 Drive Torque Wrench
6. 8 mm socket: Used to remove the (4) bolts holding the ignition coil.
7. 10 mm socket: Used to disconnect the negative battery terminal to avoid causing a short.
8. https://www.amazon.com/dp/ (commissions earned)or 14 mm socket:

 

[yrwei52]

Hi,
Can some one please confirm the NGK spark plugs use 14mm or 9/16 socket. Does it matter which one? Also I don't have torque wrench, on YouTube looks like hand tight and another quarter turn, is this about right? Thanks.

We should use 14 mm thin-wall spark plug socket as the spec of the spark plug is 14mm metric. 9/16” is 14.2875 mm and the 9/16” socket is a bit larger than 14 mm socket. In addition, the torque value is very low for spark plugs nowadays, 12 point socket won’t do any more harm than a 6-point socket although all of my spark plug sockets are 6-point. Finally, swivel function on spark plug socket is almost never needed on 4-cylinder engines.

You can do “hand tight and another ¼ turn” way, but the best is to invest a cheap ⅜” torque wrench which covers 12~14 ft/lbf range from Harbor Freight Tools.

For SkyActiv-G 2.5L the OEM spark plugs have 2 types: PE5R-18-110 and PE5S-18-110. PE5R-18-110 is made by NGK and PE5S-18-110 is made by Denso.

The NGK equivalent for PE5R-18-110 is NGK Laser Iridium spark plug ILKAR7L11 / 94124.

The Denso equivalent for PE5S-18-110 is Denso ZC20HPR11.

The torque spec on spark plug for 2.5L is 12~14 ft/lbf. A 14mm thin-wall spark plug socket is needed.

2016 spark plug torque

For spark plug gap, on PE5R-18-110, PE5S-18-110:
Standard: 1.05—1.40 mm {0.0414—0.0551 in}
New spark plug (reference): 1.05—1.15 mm {0.0414—0.0452 in}

It appears replacements can be any of the following. Might be able to track down proper socket that way.

PE01-18-110, PE02-18-110, PE5R-18-110, PE5S-18-110

This is from the FSM.

Spark plug gap [PE01-18-110, PE02-18-110]
Standard: 0.75—1.10 mm {0.030—0.043 in}
New spark plug (reference): 0.75—0.85 mm {0.030—0.033 in} Spark plug gap [PE5R-18-110, PE5S-18-110]
Standard: 1.05—1.40 mm {0.0414—0.0551 in}
New spark plug (reference): 1.05—1.15 mm {0.0414—0.0452 in}

And in order to support ION sensing capability properly by ignition coils, the resistance of the spark plugs need to be in specific range:

As for whether or not you should use OEM spark plugs or aftermarket NGK or Denso plugs, it’s your call.

Until I know that non oem plug meets the workshop manual resistance of 3.0*7.5 kilohms) I wouldn't use a non OEM plug. The ecu uses the spark plug as primary knock sensor. If the resistance is out of spec then you could end up losing power and or mpg. I've been meaning to buy a cheap plug from Vatozone and test the resistance.

What Chris_Top_Her has said does have his base. OVT (OrangeVirus Tuning) had posted following comments several years ago here.

Without getting into too much detail...you guys really...really..really want to use OEM plugs....

the reason is because the ECU uses the ignition coils, which measure a resistance across the OEM plug for pre-ignition, and extremely low levels of knock retard the knock sensor cannot pick up, along with that it gives the ECU individual cylinder information, the spark plugs are actually used "as a sensor."

How it works exactly is proprietary information that I am not willing to share, you want to use OEM plugs.

 

[JimKJSVTCX-5]

Excellent reply ywrei52. All this stuff is already in here. There is a box on the top right corner that says search. You can type things in there and find answers.

 

[CX5BC]

Thank you so much. I did search on Google, but some stated that 9/16 also worked so I asked here to make sure. Thanks again for detailed and clear responses.

 

[murky]

Thank you so much. I did search on Google, but some stated that 9/16 also worked so I asked here to make sure. Thanks again for detailed and clear responses.

9/16 probably would work. It's about .28mm, or 1/100th of an inch bigger than 14mm.

 

[JimKJSVTCX-5]

You're welcome.

 

[CX5BC]

Hi, thanks again. I can't find cheap torque wrench where I live. Could someone tell me if 150 degree turn once finger tight is about right for NGK plugs based on your experience? I googled online and this was how I came to conclude 150 degree turn. Thanks

 

[theblooms]

1/4 turn, not 150.

 

[CX5BC]

Ok, thanks 90 degree turn appreciated.

 

[CX5_Driver]

and remember if you are using anti seize compound it modified the torque by 20% because it acts as a lubricant

5 Things You Should Know About Spark Plugs

The five things you should know about spark plugs include information on anti-seize, corona stain, gapping fine wire, torque and copper spark plugs.

ngksparkplugs.com

http://www.jagrepair.com/images/AutoRepairPhotos/NGK_TB-0630111antisieze.pdf

some more reading:

Anti Seize On Spark Plugs? Dangerous or Good Practice?! - AGradeTools.com

The complete guide on how to use anti seize correctly on spark plugs. You must understand some key things to use anti seize correctly! Read here

agradetools.com

 

[yrwei52]

and remember if you are using anti seize compound it modified the torque by 20% because it acts as a lubricant

5 Things You Should Know About Spark Plugs

The five things you should know about spark plugs include information on anti-seize, corona stain, gapping fine wire, torque and copper spark plugs.

ngksparkplugs.com

http://www.jagrepair.com/images/AutoRepairPhotos/NGK_TB-0630111antisieze.pdf

some more reading:

Anti Seize On Spark Plugs? Dangerous or Good Practice?! - AGradeTools.com

The complete guide on how to use anti seize correctly on spark plugs. You must understand some key things to use anti seize correctly! Read here

agradetools.com

But NGK, who also makes Mazda genuine spark plugs, says:

“Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.”

5 THINGS YOU SHOULD KNOW ABOUT SPARK PLUGS

 

[yrwei52]

Ok, thanks 90 degree turn appreciated.

I really would use even the cheapest torque wrench (order one online or borrow one) to install the spark plugs (from the same NGK article above):

“Torque is crucial in the ability of the plug to dissipate heat and perform properly. Always follow the manufacturer recommended torque specification. An under-torqued spark plug can lead to excessive vibration and improper heat dissipation, causing spark plug and/or engine damage. Over torquing may cause any of the following: thread damage/breakage, compromised internal seals leading to gas leakage, metal shell stretch leading to poor heat dissipation and pre-ignition.”

 

[yrwei52]

Hi, thanks again. I can't find cheap torque wrench where I live. Could someone tell me if 150 degree turn once finger tight is about right for NGK plugs based on your experience? I googled online and this was how I came to conclude 150 degree turn. Thanks

If you don’t have a local Harbor Freight Tools around, and aren’t willing to order a cheap torque wrench online, you can always borrow a good torque wrench for free through the Loan-A-Tool program from any auto parts stores such as an Auto Zone nearby.

 

[CX5BC]

Thanks again. I will look for the wrench, better to be safe.

 

[RadRacer]

Advance Auto Parts - Down for Maintenance

NGK's are 5 kilo ohms, same as Denso's. So both are within spec.

 

[raj55]

Even Denso advises not to use lubricants on your spark plug. It buggers up the torquing of the plug. All the Toyota and BMW mechanics that have changed the spark plugs in my earlier cars, while I watched them, they never used the torque wrench and having done it my self both with and without, I feel comfortable doing without because there is a very nice crush washer on the new spark plugs that gives a good feed back when tightening the plug, the last bit. As soon as you feel that washer crushing in you stop tightening any further. It is all in the feel. If I am putting back the old spark plug then that feed back is not that good and then I might use the torque wrench. As a first timer it may be wise to use a torque wrench. They are quite cheap nowadays.

 

[tsd1]

We should use 14 mm thin-wall spark plug socket as the spec of the spark plug is 14mm metric. 9/16” is 14.2875 mm and the 9/16” socket is a bit larger than 14 mm socket. In addition, the torque value is very low for spark plugs nowadays, 12 point socket won’t do any more harm than a 6-point socket although all of my spark plug sockets are 6-point. Finally, swivel function on spark plug socket is almost never needed on 4-cylinder engines.

You can do “hand tight and another ¼ turn” way, but the best is to invest a cheap ⅜” torque wrench which covers 12~14 ft/lbf range from Harbor Freight Tools.

For SkyActiv-G 2.5L the OEM spark plugs have 2 types: PE5R-18-110 and PE5S-18-110. PE5R-18-110 is made by NGK and PE5S-18-110 is made by Denso.

The NGK equivalent for PE5R-18-110 is NGK Laser Iridium spark plug ILKAR7L11 / 94124.

The Denso equivalent for PE5S-18-110 is Denso ZC20HPR11.

The torque spec on spark plug for 2.5L is 12~14 ft/lbf. A 14mm thin-wall spark plug socket is needed.

2016 spark plug torque

For spark plug gap, on PE5R-18-110, PE5S-18-110:
Standard: 1.05—1.40 mm {0.0414—0.0551 in}
New spark plug (reference): 1.05—1.15 mm {0.0414—0.0452 in}


And in order to support ION sensing capability properly by ignition coils, the resistance of the spark plugs need to be in specific range:

View attachment 297980

View attachment 297950

As for whether or not you should use OEM spark plugs or aftermarket NGK or Denso plugs, it’s your call.

NGK's website states 5K ohms for the 94124 spark plug.