Spark plug recommendation and job tips

Hello,

I am due to change the spark plugs on my 2018 taco (4x4 off road).

many recommendations for spark plugs? I’ve heard good things about OEM and Denso Iridium TT 4705’s.

in addition to the spark plug recommendation, any tips for me before I jump into the DIY job?

 

The correct part numbers will be in the manual (should be a Denso and an NGK option). You can buy these anywhere, doesn't have to be from a Toyota dealer.

If you've never done spark plugs plugs before, you may want:
- Magnetic spark plug socket
- Long extensions (that fit together solidly)
- Magnet on an extension, for when shit comes apart
- Probably a flashlight, never hurts
- And patience. Plugs are finicky, if only for the fact that any screw ups are massively annoying to fix (stripped threads or cross threading, mostly).

I like using my 1/2" ratchet wrench, not for power, but because the longer handle gives me smooth control. Wrenching on a long extension is never fun to begin with.

When putting the new plugs in, you lower them down on the socket / extension, but don't put the ratchet on yet. Spin the plug counterclockwise a few times to ensure you have the threads lined up, then start threading it on just using your fingers on the extension. That will stop you from breaking anything if it cross threads.

Once you're confident it's threaded, pop the wrench and work it down. I still choke up on the handle to minimize the torque I'm putting on it.

I don't like to use torque wrenches on plugs, because there can be complicating factors (dirty threads means higher torque, anti sieze means lower torque, etc.). Most plugs have instructions, but it should be something like 1/4 or 1/2 turn after the crush washer snugs up. You'll get a feel for this pretty quickly, but you can always go back and forth on a plug when you first feel some resistance to be sure. Just keep track of where the wrench was pointing when you first felt contact, because after you start tightening the washer, the resistance changes and you can easily overtighten if you start the 1/4 turn at the new snug spot. (There are separate instructions for reinstalling old plugs, like 1/8 of a turn).

I know nothing about what's in the way of the plugs on the 3rd gen, but hopefully someone else can chime in on that. I will say if removing something would make any of the above easier, it's well worth the time to remove.

And finally, make sure you plug all the coils back in when you're done. I've definitely started the truck after a plug job to find out I'm now running a 3-cylinder, lol.

 

Here is a great video from the Maintenance Map thread.

https://www.youtube.com/watch?v=tc9FYrD7vUw

 

You know, I'm surprised there's no spark plug or general maintenance sticky (for the 3rd gen, anyway).

 

A magnetic swivel spark plug socket helps a ton

 

My tools of choice

 

This thread is in the Sticky Threads.

https://www.tacomaworld.com/threads/2-7l-update-3rd-gen-maintenance-maps-get-300k-miles.789809/

I frequently refer to these videos in post #1 of the Maintenance Map by Team Oil Drop.

Video Library

• Complete Quick Guide
• Oil Change
• Tire Rotation
• Cabin Air Filter
• Engine Air Filter
• Grease Driveshafts
• Transfer Case Oil
• Rear Differential Fluid
• Front Differential Fluid
• Spark Plugs
• Power Steering Fluid
• Coolant
• Transmission Fluid
• Serpentine Belt
• Front Brakes & Rotors
• Rear Brakes
• Brake Fluid

Extra Videos

• Engine Cleaning
• Basic Rust Prevention
• Easy Cracked Glass Fill
• Hood Wobble Fix
• Baxter Spin-on Filter Adapter
• Fumoto Drain Valve
• Spare Tire Hoist Servicing
• Lowering Spare Tire
• Bilstein 5100 Lift
• Bilstein 5100s on 265/70/R17
• Rear Shocks
• No Tools No Mess Oil Change
• OTT Tune
• 300k Mile Review (credit: Enduro Cox)

 

This is what I use and it’s a lifesaver

 

Just did this yesterday on a '21 OR. Locking extensions of various sizes, a swivel joint, and a magnetic spark plug socket are a must. Also extra light, an extending magnet for dropped bolts, and a friend to assist. The hardest part of the job is loosening the driver's side bracket bars. Those lower bolts are tough to reach. Expect a few bruises and scrapes. All done in under 2 hours.

 

Do not use anti seize on the plugs.

 

My neighbor has the Matco set and they worked a lot better than my old school socket and extensions.

I bought a set for myself for next time.
Also I found the most helpful video was Chloe Kip’s. It was a lot easier than others depicted.

https://m.youtube.com/watch?v=u3ByWKm8aP0

 

I followed this video and used oem plugs with a dab of anti seize on the threads. Hand tighten then a little more only.

https://www.youtube.com/watch?v=nPEAMNNSLj0

 

I would steer clear of "Genuine Denso" plugs off of ebay. Even from a top rated seller. The Chinese knockoffs are very convincing but the electrode melts quickly.

 

Got my Denso plugs from AutoZone. Steam Oil Drop on YouTube is awesome reference.

 

A foot of 3/8" fuel line has worked for me for 20 years for replacing plugs on aluminum heads.

I have the fancy sockets, but I always pick the rubber hose.

 

I have a very old craftsman plug socket that basically has a rubber insert to grab the plug....silicone dielectric grease doesn't help the grip.

For me the magnetic/swivel matco set (or go cheap) made it easy and one dip....all the plugs are easy, iirc 6 had to have some crap loosened and pushed out of the way.
Some of the vids over complicate it...watch some, diy it.

 

I’ve had many ebay and Amazon (more amazon) items appear to be of dubious origin (no oem packaging, returned/resale?, second quality?).
I bought my plugs from tustin toyota online.

@n0x , watch the vids, it's really not as bad as half make it out to be...even the most difficult one isn't a big deal.