How often to change spark plugs

I have a TRD S/C. it has about 4K miles on it. How often do i need to either check or replace the spark plugs. thanks.

 

Every 30K on NA applications per the manual. Not sure about the supercharged though.

 

There's a really cool booklet that came with your new truck that's full of this type of information. Go ahead, put a crease in the binding of your Owner's Manual, I promise it won't bring down the resale value

 

I don't remember the manual having a supercharger section.

That said, its gunna be a pita but I'm gonna swap at the first 30k..... I don't care if they are iridium, I want to see how things are operating. Besides, its cheap insurance.

Ymmv

 

I'm pretty sure SC calls for Iridium because of the longer change interval and the hassle in changing them.

 

You have iridium plugs in there (came with the SC kit) suppose to be changed very 96 months or 120k miles which ever comes 1st

 

If you're non supercharged then the intervals are 30k miles on all Tacoma's (06'-13'). You can swap in iridiums if you don't want be changing every 30k miles. Part number for iridium plugs is 90919-01191

 

I'd never trust any plug to come out safely after more than 40k, and people have reported I'll effects from running irridiums, and also those triple electrode plugs in n/a trucks here at least on the v6.

As for me, yes I'm force fed.... But still won't alter my replacement intervals for my own piece of mind.

 

Nope.

2.7 is 100k with Iridium.
4.0 is 30k and copper.

 

My factory plugs came out at 95k like they had just been installed.
But I would definitely stick with OEM and stay away from the "E-3" and other snake-oil plugs.

 

Rich:
For the 2.7 engine and drive train, 2WD, the maintenance is at 30K for most items. I have always wondered why the spark plugs were at 100K and not 90K. Just seems to be kind of funny.

 

X2

While n/a at least.

What u think about the supercharged trucks waiting on 90k Rich?

I won't do it for personal reasons.... Just curious what u think, u have a diverse background

 

The advantage to iridium plugs is the longer change interval. There is no performance advantage (when new).

How long? If the truck is not burning oil and otherwise fouling the plugs prematurely, 100k is fine.

If the SC installation guide does not include a replacement interval, I would pull the plugs on the right side of the engine and inspect them at 30k.

 

Normally, the 100k service items (Trans fluid, plugs, coolant, "tune up" items, etc...) are an effort to improve the JD Powers "36 Month Cost of Ownership" numbers.
Iridium plugs at 100k are a comparable cost to copper plugs at 30k if you are doing your own work, but for the purposes of the JD Power survey, few people hit 100k in 3 years, while most everyone passes 30k, so most people would have at least one, and possibly two 30k service intervals on the survey.

Why they stuck with copper and 30k on the 4.0, I don't know... but the plug change cost would be offset by the reduced oil change cost of 5w30 conventional vs the 2.7 needing 0w20 or 5w20 synthetic.

And ya... why they went to 100k and not 90k? Odd.



Edit: Double checking my manuals now.
Wife's '04 Rav4 - Echo gets plugs at 30k (Echo in the Rav4 manual?)
Rav4 gets plugs at 120k (I changed hers around 80k, she's at 145k now)

Nope.... cjimenRR is right on iridium... it's 120k for the 2.7

 

LOL, yes, my owner's manual did not come w/ a S/C section. Appreciate all the responses. I'll do some more reading up on the type that came with the kit.

 

FWIW, I bought my Tacoma w/25k on the odo and CPO'd (160pt inspection or whatever) and dealer installed TRD supercharger. I'm a bit picky about my things and since I wasn't the one who installed the s/c to see what went on the truck I decided to swap out my plugs when I put the smaller pulley on at 30k miles. Peace of mind is a cheap thing to buy sometimes and I'm glad I did because the plugs I took out were not the ones that come with the TRD s/c kit so I'm not sure what happened but I'm glad I got them swapped out now.

FYI, copper generally performs better than Iridium despite the marketing campaigns to the contrary. In all my high performance applications (read: high boost) where ignition is critical I always ran copper and just planned to change them more often. To most people driving a Tacoma this detail is inconsequential as nobody is running on the ragged edge of performance/safety. So it's a nominal trade-off to not have to change them as often and one I was happy to make because pulling the s/c just to change three plugs sure is a PITA.

 

Do u have the plugs still, or write down the number?
I'm curious what the hell happened and hope they didn't throw a hot plug in there... How odd, parts were included, why the heck didn't they use em?

Thankfully I know a tech who was on my install team and he verified they were the plugs supplied. I asked for all my old parts, sadly my plugs were just changed 10k b4 the blower so I had plenty of life in them. But the trade off was well worth it.
Did u contact the dealer and ask what happend?
They didn't reuse ur stock plugs did they?

 

I still have the older plugs and the boxes for the new plugs are in the basement.
i'll pull them out tonight and see exactly which type. i think there are 3 different ones they recommend for a TRD S/C. at least that's what's on the sticker under the hood w/ the serpentine belt configuration.

 

I still have them in fact. They're Autolite 5325's and the gap had grown to over 2x the factory specification (they were too wide to measure with the gapper I was using) and were fairly black (rich) with some red coloring (fuel additive) on the insulators which were intact and in good condition. Not sure how the gaps had grown so much in less than 30k miles. I need to call the dealer to see exactly when the s/c was installed to know just how much less but that less than 30k assumes it was installed when the truck was brand new which I doubt. Needless to say, I'm happy I decided to not trust the dealership and change the plugs just like I always change the oil and other fluids right when I buy a used vehicle. I never trust what the previous owner says and just assume all maintenance needs to be done and factor that in mentally when I'm making my financial decisions on the vehicle.