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Old 05-17-2017, 07:09 AM   #37
Goosecreekjoey
 
Drives: 2008 yaris
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Could be every 3000 miles like years ago. You Changed plugs when you changed oil. That would be about 30 or so plug replacements in 100,000. G that would be great. Toyota knows, like the SHADOW KNOWS. WHOES the SHADOW, look up.
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Old 03-04-2018, 10:20 PM   #38
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At almost 92k on my `08. Planed on changing the plugs this summer.
How are the factory wires on the yaris? Will they have deteriorated to any consequential degree in 10 years?
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Old 05-13-2020, 08:32 PM   #39
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108,400 now, just bought new plus for the first time. Will be changing them out soon.
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Old 05-14-2020, 07:25 AM   #40
ex-x-fire
 
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Get some coil boots too.
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Old 05-14-2020, 08:23 AM   #41
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Originally Posted by ex-x-fire View Post
Get some coil boots too.
Why is that? I have changed spark plugs several times, I have never noticed any damage or worn-out boot.
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Old 05-14-2020, 07:28 PM   #42
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Why not, its just a few bucks more.
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Old 05-15-2020, 12:31 AM   #43
komichal
 
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I also like preventive maintenance, however I never thought of changing the boots as I have never seen anyone having problems with these. Luckily for me, they are not normally sold in the stores around so I am not tempted to buy them. :) Plus I believe the original ones, though 13 years old, are still better than new aftermarket ones.
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Old 10-21-2020, 01:07 PM   #44
robkay
 
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My '07 hatch has been running fine, but I knew it was overdue for a plug change at just under 137000. I bought the stock Denso plugs. It make a big difference in how the car runs.

Last edited by robkay; 01-18-2023 at 12:29 PM.
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Old 10-25-2020, 02:30 PM   #45
Mister
 
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90 000 Kilometers is what is stated in the TIC documents from what I see. Iridiums.
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Old 01-18-2023, 10:29 AM   #46
mr9865
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I'm at 160,000 on the original plugs, maybe i should change them?
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Old 01-18-2023, 11:53 AM   #47
Compeer
 
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Quote:
Originally Posted by mr9865 View Post
I'm at 160,000 on the original plugs, maybe i should change them?
Iridium plugs don't melt the tips like copper plugs do, You can clean them check the gap and if they look mint they are mint.

We changed out copper plugs at 30k because they slowly burnt the copper tips away, iridiums melting tempture is so far above the engines combustion tempture you could melt the entire engine down and the irdium tips would still be intact.\

So at 100k you can clean them, regap them and if they dont look damaged reinstall them, Ive heard of people doing 300k km on them and they are mont as long as they are cleaned and gap checked every service.

In saying that I run one step colder plugs NGK bkr6eix-11 since I live in the heat and like to give her shit, she runs mint on them.

NGK and Denso are both japanese made quality plugs that provide OEM plugs to japanese companies, if Denso is out of a plug they install NGK and vice versa in japanese cars.
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Old 01-18-2023, 12:01 PM   #48
sh0rtlife
 
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Quote:
Originally Posted by mr9865 View Post
I'm at 160,000 on the original plugs, maybe i should change them?
100-150k is useualy when the OEs start failing in most cars...asuming we are talking miles not kilometers lol
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Old 01-18-2023, 02:26 PM   #49
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160,000 miles
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