Spark Plug Replacement | 2014-2018 Mazda 3 | 2.0L

[@Nexxorcist]

just wanted to say thanks for the needle nose pliers tip. had to pull the spark plug socket off 4 times cause they were fit on so snug.

[@ZekeLawl]

Thanks so much for this. I’ll be using this video next weekend to do this job. I can’t believe how much money you can save by doing your own maintenance.

[@ContasYT]

Thanks for your guide, this will be helpful once I want to do mine 😀

[@taichihead42]

How tight did you tighten the plugs.

[@brentworksgarage]

Service manual states 12-14 ft-lbs (15-20 Nm).

[@taichihead42]

@@brentworksgarage I wouldn't go past 15 NM buddy.

[@brentworksgarage]

@@taichihead42 Agreed. I'd stay on the lower side of those specs.

[@hfbtrbdfnjbtrjtryg]

No need for dielectric grease? And if so, where?

[@brentworksgarage]

It is optional. If you do want to use it, put a small amount on the inside of the spark plug boot. Use something like a Q-Tip to apply.

[@pututski6968]

Do you need to disconnect the battery? Or no since we aren't touching anything electrical?

[@brentworksgarage]

I generally don't disconnect the battery when changing spark plugs.

[@pututski6968]

@@brentworksgarage thanks! I hadn't before but wasn't sure if it was bad

[@quintingraves3976]

How much total would say you spend on tools and supplies

[@brentworksgarage]

Already had a ratchet, but the spark plug socket was about $15, and the spark plugs themselves were $50 at the time. So around $65. Canadian $$$.