Replacing Spark Plugs going with NGK Iridium IX?

BOSTONBOATSWAIN

MEMBER
2014 KIA SOUL
2.0L
4 CYL
2WD
120,000 MILES

Replacing Spark Plugs - going with NGK IRIDIUM IX (don't need longevity of the Lasers)

Thought I use 3/8 socket to remove plugs but keep seeing multiple #'s.

Can someone please tell me what I need to buy? 14mm.16mm.3/8.5/8.?/16?

Completely lost.

Thanks,
Diane P

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

5/8-inch (16mm) Spark Plug Socket: This socket size is standard for many spark plugs, including the NGK Iridium IX that you're planning to use. Here is how the job is done correctly in the images below. I would replace the ignition coils as well and service the throttle body.

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

and

https://www.2carpros.com/articles/throttle-actuator-service

Check out the images (below). Let us know if you need anything else.

Images (Click to make bigger)