When to change spark plugs?

[Blkraven66]

Hey Mavericks ! Happy Wednesday. I believe the owners manual states that the spark plugs on the 2.0 Ecoboost can wait to be replaced until 100000 miles. My mechanic says to never wait that long( past Ford experience). The dealership shop manager says I'm just wasting money doing it before 100k. Anyone out there replaced yours yet? What mileage? Any issues? DIY or mechanic? Just looking for some feedback. Mines a '22 XL AWD Ecoboost. Have a good one.

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[Tbone289]

My experience with 2.0 liter Fords says change them at 50-75K miles. They will last to 100K, but they will be noticeably worn by then, with an increased gap. Changing them earlier will maintain better efficiency and drive-ability.

 

[Blkraven66]

My experience with 2.0 liter Fords says change them at 50-75K miles. They will last to 100K, but they will be noticeably worn by then, with an increased gap. Changing them earlier will maintain better efficiency and drive-ability.

Thank you for the feedback ! Definitely use a little anti-seize , correct?

 

[Tbone289]

Thank you for the feedback ! Definitely use a little anti-seize , correct?

You're welcome.

I typically don't use anti-seize. The reason is that adding a lubricant to threads alters the torque spec by up to 20%. In other words, if you add anti-seize to the threads, you will need to reduce the published torque spec ~20% to obtain the proper torque. You can make the judgement call based on the threads of the plugs you remove.

 

[Blkraven66]

You're welcome.

I typically don't use anti-seize. The reason is that adding a lubricant to threads alters the torque spec by up to 20%. In other words, if you add anti-seize to the threads, you will need to reduce the published torque spec ~20% to obtain the proper torque. You can make the judgement call based on the threads of the plugs you remove.

Ok, good to know . Thank you !!

 

[Exranger]

Change at 60k so you can get them out ok. Plugs are pretty affordable . I waited on my Honda till 100 k and a couple threads of the head came out with the plug. The no anti- seize club is a small membership. Torque to feel is fine, or use a wrench, your style is ok for you. I’ve seen a tech put in plugs with an impact wrench…scared the heck out of me…

Also put dielectric grease on the boot as well.

 

[Blkraven66]

Change at 60k so you can get them out ok. I waited on my Honda till 100 k and a couple threads of the head came out with the plug. The no anti- seize club is a small membership. Torque to feel is fine, or use a wrench, your style is ok for you. I’ve seen a tech put in plugs with an impact wrench…scared the heck out of me…

Thank you for the feedback!

 

[Tbone289]

Change at 60k so you can get them out ok. I waited on my Honda till 100 k and a couple threads of the head came out with the plug. The no anti- seize club is a small membership. Torque to feel is fine, or use a wrench, your style is ok for you. I’ve seen a tech put in plugs with an impact wrench…scared the heck out of me…

In all honesty, I typically torque-to-feel as well, I just don't give that advice to others that may have less experience for that "feel" than I do. Techs using impact wrenches where they shouldn't is one of the reasons I've gained that experience--I can't trust them.

 

[NJBob]

Change at 60k so you can get them out ok. I waited on my Honda till 100 k and a couple threads of the head came out with the plug. The no anti- seize club is a small membership. Torque to feel is fine, or use a wrench, your style is ok for you. I’ve seen a tech put in plugs with an impact wrench…scared the heck out of me…

Also put dielectric grease on the boot as well.

I always put antisieze on. Although I did read severe that modern sparkplug already have some type of coating to prevent siezing. Had a Chrysler K car where the plug broke off leaving the threaded portion in. I ended up drilling it out. However the location of the plugs on that car was easily accessible. Ever since then I always use it. Using an impact gun? Those things are used to much.

 

[Ozarkbeard]

Also put dielectric grease on the boot as well.

This

 

[Blkraven66]

This

Exactly, almost forgot about that ! Thank you.

 

[Montana]

Agree 50-75k is the time.

Part number for you:

EB Spark Plugs: Motorcraft SP594

and just in case:

EB Ignition coils: Motorcraft DG576

 

[Blkraven66]

Agree 50-75k is the time.

Part number for you:

EB Spark Plugs: Motorcraft SP594

Thank you all so much ! Really appreciate the input.

 

[masterkeosk]

My fusion sport with the 2.7 ecoboost needed plugs every 20k or so after it got tuned. Found that out at the dragstrip when I was running about 1 second slower than a couple months earlier.
So $20 in parts for some peace of mind every 50k miles is worth it in my mind.

 

[tciotti2003]

Just my 2 sense...Bought my 22 EB Lariat 1st edition AWD used from a chevy dealer. Had 20k miles..With in 4 weeks I had ALL the fluids changed including the PTU (Power Transfer Unit in the front) and the RDU (Rear Drive Unit in the back). I'll also be changing the belts and having the tune up done at 60k miles. Something I've done for every vehicle I've owned for the past 20 years. My 2004 Toyota Matrix was sold with over 300k miles last year and our 2012 Kia Sorento which we still own has 135k miles and wouldn't hesitate driving anywhere no matter how far. Piece of mind is priceless

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