changing spark plugs

Hello,

I'm nearing the 100k mark and I figured it was probably a good idea to change out the spark plugs.

When I inspected them they looked practically brand new. They're OEM and (I assume) original to the truck. I know that iridium plugs are supposed to last a long time but I'm curious what your opinions are...replace them now or wait? If you'd wait, how long?

I have a 2013 2.7L regular cab.

 

Since it is a pretty easy job.
I’d do it now. For peace of mind if nothing else.

 

I changed mine sometime around 100k and didn’t notice a difference. I should’ve just waited. I think it’s more important that they’re not frozen in place. As long as they come out and If they look ok throw them back in for another year and re check.

 

I changed mine at 120k, for peace of mind.

 

Do it. Early is better than late.

 

Got my truck (At 157k miles) and first thing I checked was filters and immediately changed plugs just to be safe and know for sure they’re fresh.

cheap and a few hours.. why not

 

You guys are too funny. Toyota recommends that spark plugs should be changed out every 60,000 miles.
Yet you have 150K plus miles. But, want to change them for peace of mind.

 

If you don't already have new plugs ready, and your old ones look fine, you could clean and re-gap and reinstall. I don't see a problem with that. A few tips: be very careful with the center electrode when gapping, iridium is very hard and brittle, can chip or crack easily. Be sure to use a *small* amount of anti-seize on the threads. New plugs have a coating on the threads and don't need anti-seize, but used plugs will need it. Keep the anti-seize away from the electrodes. Torque properly.
Personally, I figure for $6-8 apiece every 100k miles, it's cheap and easy maintenance. I clean the MAF sensor and throttle body when changing plugs.

 

Replace them,and make sure the gap is correct,good job on doing them yourself O.P.

 

Mine weren't changed for 150k km I changed them out recently and the engine got quieter, it used to tick on acceleration, now it doesn't

 

I tried irridium plugs and it ran like shit.

 

People also recommend oil changes at 3k miles lol

 

changed mine at 117.5k miles they easily could have went the the recommended 120k miles, the gap was at .045 when I pulled them

 

The OP has a 2.7. It came with iridium plugs. I would put a new set in at 100k and then have a beer.

 

I just changed mine at 96k - bought my truck at 75k. They were hard to get unscrewed and looked half ass. I think these were the original plugs from 2013. They definitely needed changing, and I’m going to at least check them every 30k. I put a tiny strip of anti-sieze across the threads of each one; I expect an easier time coming out the next go ‘round. Along with it, I changed air filter and cleaned MAF and TB. The engine ran smoother and quieter after this. There’s hardly a better feeling knowing your shit is running clean and having an easier time doing so.

 

Please put in the OEM recommended type of plug. If a engine is designed for copper plugs then replace with copper. Copper has less resistance than iridium and platinum has the most resistance of the 3 types. If using iridium or platinum plugs they could overheat because more resistance = more heat. Engines designed for iridium or platinum have taken into account the extra heat dissipation needed and also a higher voltage ignition system to overcome that resistance. Copper will perform better at the cost of wearing out faster.

 

I would also change them out. Sure they might look fine, but you dont want to risk them getting stuck in there bc you ran them longer than the specified interval. Cheap preventative maintenance imo

 

at 117.5k miles my original plugs came out with no problems or hangups, the recommended 120k mile interval is right on the money IMO

 

This. OE is iridium. You can buy them at Rock Auto and save $ vs locally. I wouldn't buy on Ebay as there are counterfeit NGK iridium plugs, and probably other brands as well.

I changed mine at 100k because I have had problems removing plugs on multiple vehicles with the 100K+ mile change intervals- they can seize in place; it's not a good feeling coaxing them out even after partially loosening and spraying with Kroil. I always use a small amount of nickel anti-seize on plugs to prevent this the next time.

 

I bought my truck used and didn’t know if / when last owner did it.

Plugs are cheap and I did it myself. Lol

Yeah, I’d say that’s peace of mind.