2015 -2021 Subaru WRX Spark Plug Change
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- čas přidán 18. 06. 2023
- Change the spark plugs on your Subaru WRX! In this video I show you how to replace all of your spark plugs on your own step by step! This procedure applies to the 2015 - 2021 WRX models with the 2.0L FA20F engine.
Product Links
Spark Plugs : amzn.to/42Hl0Pu
Spark Plug Swivel Socket : amzn.to/43XonTs
Swivel head ratchet : amzn.to/3yHwdpU
Magnetic Pick Up Tool : amzn.to/3p4lykP
Latex Gloves : amzn.to/3J58YbI
Starting Tool Set : amzn.to/3pDlpVI
Subaru WRX 2015 2016 2017 2018 2019 2020 2021 #diy #autorepair #subaru #wrx #carsyoucanfix
*Disclaimer: This video or video description contains affiliate links. That means that I am awarded a small commission for purchases made through them, at no added cost for you.
Spark Plug Swivel Socket : amzn.to/43XonTs
Bro legit saved me $500, idk what other peoples local tuner shops charge but 450 for just labor on plugs/compression test. I hope his page grows and more people see this.
Thanks man! Please consider subscribing to help the channel out!
Daamm son you just saved me $480. Here in California.
Dropping the coil bolt down the engine bay is a very important step do not skip it lol but seriously good job my guy subies aren't so bad idk why most ppl are afraid of working on em
This is THE video for 15-21 WRX spark plug change. NO BS - just straight steps
Thanks for your encouraging comment!
What about setting the gap on the plugs?
@blk-mosquito174 if you use the spark plugs mentioned they will come pre gapped
Hands down this is the best video for changing the WRX spark plugs. Perfectly explained, step by step and video editing. Thank you sir !!!!
Wow, thanks!
Finally, straight to the point videos for the 15+ WRXs. No fancy edits, over the top tool shops, lifts, etc. Just a garage and every day tools.
Doing mine next week on my 21, and this video saved me time and money.
Thank you, Cars You Can Fix.
Thank you!
Great video very clear step by step instructions with great clear camera views. But as a certified tech and shop manager I would like to give one bit of advice and recommend that the battery be disconnected before moving the ECU our of the way for access to the passenger side plugs. It must be removed anyway to access the driver side plugs and although most don't worry about it just about any manufacturer will say in the service manual to disconnect the battery before any spark plug replacement and that usually goes for any car. I don't always pull the negative terminal but on a vehicle like the wrx that needs the ECU moved aside I would recommend pulling off that negative just to be super safe or just remove the battery since it must come put Regardless. Anytime any service is performed on the engine or chassis electrical systems the battery should be disconnected even if it doesn't really seem all that relevant I would rather avoid the cost of a new ECU if just one wire happens to be exposed and by simply moving the ECU it causes a short and fries it and that would not be a surprise for an ECU and harness located under the hood like the wrx where it's exposed to severe heat and open to rodents that can be really hard on those harness wires. All it takes to damage a sensitive ECU is just one tiny slit in the insulation of just one wire that is so tiny with just a couple strands of frayed wire to cause a short that puts the ECU on the death row electric chair lol. So yeah awesome video just wanted to explain in detail why the battery should be disconnected first better safe than sorry with a huge parts and labor bill ready to eat ur credit limit lol
Best vid out there way to show everyone the steps and not skip 🙏🏻💯🔥
Thank you!
I mean he did forget to check the spark plug gap and the proper torque specs for the plugs. Both are quiet important for Subarus especially cause they are so finicky
@@victormaciasjr.1615 this come already gap I believe
Hey! I wanted to thank you so much for this video. I did this for my first time ever changing spark plugs and the first time doing it on a boxer engine. You made this process so easy to understand, clear, and detailed.
You made sure to link parts, and the camera angles were perfect.
Thanks to you I’ve got it done and car is running smooth as ever! Thank you for you your hard work making this video and for giving me a new set of skills that will help me for years to come!!
Thanks for your very thoughtful comment! So glad to hear this video was able to help you get the job done!
Thank you for posting this AND even posting links to some of the helpful tools you had too. I'm going to do this later this week hopefully.
Thanks for commenting! Appreciate the kind words and good luck on the job!
A lil off topic, but Subaru has a procedure to rotate the negative battery sensor, in case of battery caps getting in its way (like in the video.) I just ran into this issue myself and found the fix when searching about it. A quick and easy rotation of the sensor for peace of mind. Thank you for the easy to follow video! Spark plugs are coming up soon.
Literally doing them this weekend. Awesome
Let us know how it goes!
Man I can’t thank you enough, for real you saved us a lot of money and hassle!!
Really glad to hear the video helped you!
Thanks for making this video i just got a 2017 wrx and needed this thanks brother man
For sure bro! Thanks for the awesome comment!
Very straightforward guide. Thank you!! Subaru wants to charge $1100 for spark plug replacement and injector cleaning. I’ll try this out when I can!
Thanks! Hopefully this guide can save you $$$!
i was literally just about to bring my 19 in for plugs because i thought they were hard....Im doing them! thanks man
Nice! Glad this video can help you out!
Great video dude! Thankyou!
Thanks for your awesome comment!
Thanks for this. Ive heard the boxer was a pain to change spark plugs on, but this doesn't seem *that* bad. Definitely harder than a normal engine, but nothing too crazy
It's a bit tight in there, the swivel socket with the swivel head ratchet really helps.
Straight to the point. Love this vid. Like and subscribe for sure, thanks for sharing man. Keep it up! 👍🏼
Thanks for subscribing! 🔥🔥
I love having small hands :) I didn't remove anything out of the way. Went straight to the 4 coils, and plugs :) most people can't and I get that, it's nice having small hands that can reach!!
In the world of auto mechanics, that's actually a blessing 🙌
excellent video thanks boss.
Thanks for watching!
Now I know what I'm doing today!
Great video bro, thinking its time to change my plugs at 140k on my 2015 and haven't had them changed once but honestly they seem fine still somehow.
I bet you would increase your gas mileage just a little bit with the new plugs!
Straight to the point showing all the steps. Would have been a bit helpfull at the beginning if you lay down the tools. Still one of the best video well lit under 10 mins
Thank you! And I also appreciate the constructive criticism, as a new channel I'm still trying to nail things down.
Bout to give mine a shot now. Don’t look bad at all
Let us know how it went!
It went great! No cuss words and only thing I didn’t need was the swivel. Thank you!
Thank you for the helpful vid. The OEM specification for spark plug gap on this model/year WRX is 0.020” - 0.022” though these NGK Laser plugs on various websites say a gap of 0.024”, did you check the gap on your plugs prior to install and if so what were they set to? I purchased the same NGK plugs for my 17’ WRX. Thank you.
Great Question! I do check the gap to make sure they are not way off. You must be very careful because the center electrode is very brittle and can break or fracture. For .002" difference in spec I leave plugs as is, it's not enough to make a noticable difference. On the other hand if you are pushing a highly modified engine with 500HP plus, then it starts to matter a bit more. Personally I would leave the NGK Lazers be at the gap they come with. If you really wanted to get exact you could use a pair of gaping pliers, that would be your safest option.
@@CarsYouCanFix Thank you for the reply! I measured the new NGK Laser spark plugs in which they were all within spec at .021" so I installed them as is. Would you happen to know what can be the cause of stumbling/flailing idle once vehicle reaches operating temperature during start-up? The car feels runs rough and feels like it wants to turn off in which I would then give it a little throttle to keep it running. If I therefore drive a short distance such as neighborhood street block and then do a full stop, the idle usually goes back to normal and the vehicle doesn't have this "stumbling" condition. This only happens when the car is turned-on after it reaches operating temp, it's not a spark-plug related issue as I was experiencing this prior to installing the new plugs. The car is a stock 2017 WRX with the exception of the COBB Big SF intake.Thank you for your time!
@@CarsYouCanFixThe spark plug socket that you used is a 12pt where the NGK spark plug hex is 6pt, did you experience any fitment issue as I’m considering purchasing this same socket for my WRX in which I’ve only used prior 6pt spark plug sockets. Thank you.
@vanquishstorm3806 no fitment issues at all using the 12pt socket on a 6pt spark plug. The swivel and thin wall really make the socket worth the purchase.
@@CarsYouCanFixThank you for the reply, I ordered a 12pt magnetic swivel spark plug socket for my WRX.
One of the best instructional videos I've seen. A quick question, how do you gauge the correct tightness when tightening the new spark plugs? Im a newbie and would love to know a rule if thumb way? Thanks heaps and keep up tbe great work 👍
Best practice is to use a torque wrench, but not everyone has one and sometimes you can't use it due to space issues. Once the plug bottoms out by hand, there is now a crush washer that will compress, you will feel slight tension, then it will abruptly want to stop, that is the point where it is tight enough.
Thanks a heap 👍
This job kicked my ass ngl. Not sure how the hell you got the cylinder 4 one out with ease.
That is the tightest cylinder to get too. Using the swivel socket really helped and I think I also had a really short extension on there too. Glad you got it done though!
Thank you, Subbed asap! 🎉
Thanks so much! I appreciate your support!
@@CarsYouCanFix Please keep the Subaru WRX 2015-2019 DIY Tutorials coming 🙏 Thank you in advance.
What attachments did you use to get that drivers side rear spark plug out ?
That was just the swivel spark plug socket and the swivel head 3/8 ratchet. No other extension
@@CarsYouCanFix thank you brother appreciate you greatly! Such a tight fit in there lmao
Where do I get the swivel for the wrench?
Swivel head ratchet : amzn.to/3yHwdpU
Spark Plug Swivel Socket : amzn.to/43XonTs
Would you recommend any other tool box set? the 216 craftsman cost is $209 atm. i hear people buy it on sale for 99$. should i fork up the extra money and go for the recommended tool box or do you recommend another brand?
For mid tier tools I do like Craftsman for the quality, also take a look into GearWrench tools. They are decent quality too. I would avoid cheap harbor freight type tool sets though
I’m going to buy the spark plug swivel socket and magnetic tool that you recommended as well. Any specific wrench tool set that recommend that would have all the tools recommended to complete this job
Here is a Gear wrench set that is a little bit more affordable, amzn.to/47ZPShz it's a 110 piece set but should get you started with what you need.
@@CarsYouCanFix I got the craftsman on sale for 109 at ace hardware! Let’s go!
@@sebhenao Sweet Score!!
How often do you change spark plugs on 2018 WRX?
Subaru recommends every 60k miles or 5 years.
How often are suppose to replace the sparkies?
I believe Subaru calls for 60k miles on these.
isn't there an amount of torque you are supposed to apply?
Torque spec on the spark plugs is 17.5nm
there's a crush washer on the ngks, and on the side of the box 1/4-1/2 turns past finger tight, because it's kindof a bitch to get a torque wrench in there for the rear ones
Why didnt you Torque the plugs down to spec?
When you do this everyday you sort of get a feel for it, and since these plugs don't index like some luxury engines, I just go by feel. But it's always good practice to use a torque wrench. Also this is one of my earlier videos, I do use a torque wrench a lot more on my newer videos, since that's what someone doing DIY should be doing. Great question!
no dialectric grease? looks easy enough. probably take me 2 hours as any mx takes me twice as long.....
I use dielectric grease on stubborn coils that are hard to remove, so next removal is easier. I don't use it for every spark plug replacement.
sure as shit wasn't any in the ones that just came out of mine from the factory and they came out just fine, so i just put in the new ones without any either. super easy compared to dealing with the shitbox i used to drive. i LOVE coil packs now, fuck a bunch of wire boots, lol
I can't find my cord :(
Let me know if you need help getting these plugs done
Not sure why you removed the plugs on the coil? No need and they are a bitch to mess with
I left the rearward plugs connected. Mostly removed the connectors for filming purposes for a better view, on some of the older models there is even less room and I just leave the connectors connected.
Nice video but you didn’t torque your plugs. No bueno.
When you do this stuff all the time you get a feel for torque, where it should stop. It is good practice to use a torque wrench though.