Toyota ignition systems do not wear plugs in that manner.
Who has time for that?!? Waiter.....run the plugs in and ship it!
4 cyl Camry near 100K miles on original plugs. Time to change?
- Thread starter andyd
- Start date
I don't have tons of experience but I've changed many factory-installed Iridium plugs in Hondas, Nissan, and even Ford that were 100k+ miles and they never looked that bad. If I had removed them for "inspection" only, I'd have left them in longer but they were all slightly past the service interval and I had the replacements so they were getting changed no matter what. The 6 plugs in a Nissan were still within factory-spec on the gap at 115k miles.
It's getting close to the end but you could probably get another 40k if it hasn't been burning oil. Plug changes are easy on these engines and there's only 4 instead of 6 or 8 and without needing the manifold removed like with the cramped v6. I'd get ngk rutheniums if you do plan on it, But i'd put it off for another year or two.
I'm surprised they've lasted that long. I've changed several of these 100K mile plugs before 100K miles because they didn't make it. My brother's Scion had 94,000 I think, and he drove it in on two cylinders and the OEM Denso plugs looked absolutely horrific that came out of it. Just changed plugs last weekend on the neighbors 2017 Dodge grand caravan at 76,000 because one of the OEM sparkplugs stopped firing. Changed sparkplugs on our 2008 Chrysler T&C at 75,000 as apart of a tune up when we got it, they were working but those sparkplugs were all fouled, half of them missing the double platinum pad on the ground strap and the gaps were all around .070" on those. Those were also OEM, my grandfather bought the thing new and never changed them.
Yes it is time and install the same as you took out....
I always do mine a little early. In the past I have had the ceramic insulator break and almost fall into the engine while removing older ones. And I always go with OEM as I have seen ignition issues with aftermarket on some engines.
I changed the plugs in my camry at 100k miles with counterfeit Densos from Amazon. Changed them again at 120k miles with Densos from AZ. A magnetic spark plug socked makes it a very easy job.
Whether to put never seize on the threads is a whole debate in itself.
Whether to put never seize on the threads is a whole debate in itself.
It is not really a debate as it is not needed anymore… Just about every spark plug manufacturer will recommend against putting any lubrication on spark plugs. NGK, AC Delco, Champion, Bosch, Denso, and more all say to avoid it.
NGK spark plugs feature trivalent plating. This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. The coating also acts as a release agent during spark plug removal. NGK spark plugs are installed at the factory dry, without lubrication or anti-seize.
Anti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.
https://ngksparkplugs.com/en/resources/5-things-you-should-know-about-spark-plugs
Its that simple....
Mine looked identical to yours. The electrode wear was about the same at 87k miles when I pulled them out.
Supposedly it’s the Champion plugs in Chrysler engines that do this and NGKs apparently don’t wear out the electrode like that. But I’m not sure how accurate these reports are.
At what point do you freshen up the O2 ?
- Joined
- Nov 19, 2023
- Messages
- 871
when it throws a code?
OR
You could be proactive and observe if they are lazy, but whose got time for that.
Last edited:
When you have to hold your breath at stoplights because the 02 sensor keeps telling the computer to pour more fuel into the engine
- Joined
- Nov 19, 2023
- Messages
- 871
I thought that was an exhaust mode that comes free in rust belt states?
- Joined
- Jul 15, 2023
- Messages
- 1,434
Another vote for NGK Ruthenium. They work great.
- Joined
- Sep 24, 2023
- Messages
- 1,458
Wouldn’t change until necessary. Denso or NGK’s
Oh maybe, i don't live in a state with clouds or rain or other weird stuff so it's only happened to me because of a lazy sensor.
It did happen once because of a shorted injector loom on a friends car. There was so much raw fuel in the exhaust that the cat couldn't burn it off, so it was spraying it out the exhaust. Probably was a fire hazard to be leaving a trail of flammable mist behind, but nobody died
NGK might want to check with Honda on that. Best thing people can do when it comes to spark plugs and anti-seize is not tell anyone what they used or didn't use.
A 4-cylinder Camry is very easy to change them on. It came with Denso or NGK iridium from the factory, or sometimes even both. When you remove the old ones, you might actually find 2 Denso and 2 NGK plugs, and they will look almost new.
Replace them with Denso Iridium TT, or the original Denso or NGK iridium.
I think the interval is 120k
Replace them with Denso Iridium TT, or the original Denso or NGK iridium.
I think the interval is 120k
Similar threads
