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Old 06-03-2009, 02:19 AM   #1
phenoyz
 
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spark plugs

when do we change the spark plugs?
anybody knows the oem spark plug model of yaris sedan '08?
thanks
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Old 06-03-2009, 07:02 AM   #2
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You change them at 100,000 miles.
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Old 06-03-2009, 10:13 AM   #3
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You change them at 100,000 miles.
iridium spark plugs?
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Old 06-04-2009, 09:55 AM   #4
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Yep.
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Old 06-04-2009, 09:57 AM   #5
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the set goes for about $25-$35 depending where you get them from
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Old 06-04-2009, 08:05 PM   #6
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Heard that it may be wise to pull plugs @ say 50,000 miles regap & clean the threads add antisieze to threads & reinstall them if you dont want to buy new ones. This is to prevent plugs from siezing in the heads when you pull them @ 100,000 miles.
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Old 06-04-2009, 10:21 PM   #7
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They're installed with proper antiseize compound at the factory, and gapping's not recommended with the iridium plugs. It is highly advisable to let the engine cool completely before removing plugs from an aluminum head, and to use a torque wrench when installing the new ones, though these are plugs that use a gasket and thus have some leeway on installation torque. If you ever strip the plug hole threads in the head, though, you'll wish you hadn't.
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Old 06-04-2009, 11:23 PM   #8
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Yep.

do you know the code/name of the spark plug (e.g = bk123456???)
both the sedan and the hatchback have the same spark plugs?
also do they have the same engine as well? (hatch and sedan)

Last edited by _phenoyz_; 06-05-2009 at 10:22 PM.
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Old 06-04-2009, 11:35 PM   #9
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^^the sedan and hatchback have the same engine and spark plugs

Any dealer or parts store will be able to get you the right iridium spark plugs
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Old 06-05-2009, 07:43 PM   #10
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Google "Yaris spark plugs" and you'll quickly find the part numbers. Yes, the engine is the same in the U.S. sedan and liftback models. 1496cc 1NZ-FE.
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Old 06-25-2009, 10:46 AM   #11
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I had no problems pulling plugs at 80,000 from factory. I did mine a little earlier then 100,000 a my own personal insurance, they looked very good. I will probably change mine again at 150,000.
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Old 06-25-2009, 10:56 AM   #12
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Quote:
Originally Posted by xairmech View Post
Heard that it may be wise to pull plugs @ say 50,000 miles regap & clean the threads add antisieze to threads & reinstall them if you dont want to buy new ones. This is to prevent plugs from siezing in the heads when you pull them @ 100,000 miles.
Yes, this his what many recomend.
Personally, I simply changed the iridium plugs on my othe car at about 60k. IMO, if you are going through the trouble of pulling them, you might as well replace them.
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Old 06-25-2009, 02:06 PM   #13
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I'm not going to trouble myself to look at them earlier than recommended, as long as it's running OK.
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Old 06-25-2009, 05:02 PM   #14
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I had no problems pulling plugs at 80,000 from factory. I did mine a little earlier then 100,000 a my own personal insurance, they looked very good. I will probably change mine again at 150,000.
Insurance against what?

What?

Nothing!

Changing them out before 100,000 miles is a waste of time and money.
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Old 06-26-2009, 03:00 AM   #15
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Yep. If you leave plugs in place way past the recommended change interval till they're totally shot, what will eventually happen is that a Check Engine Light will come on with a code for random misfiring. No BFD.
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Old 05-07-2014, 09:13 PM   #16
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I just wanted to come on here and say thanks to you guys for giving me the proper advice to get the job done properly. I'm so impressed I made an account and plan on contributing what little knowledge I have to the cause. This website is awesome.
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Old 05-07-2014, 10:43 PM   #17
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Yep. If you leave plugs in place way past the recommended change interval till they're totally shot, what will eventually happen is that a Check Engine Light will come on with a code for random misfiring. No BFD.
Or even worse. I can remember when I was in college and working closing shift at Subway. Closed up the restaurant at 0200 and my coworker headed out while I took care of the alarm and cashout. This was back in 1995 when cell phones for all intensive purposes were still bag phones and expensive. I come out to my parent's 86 Corolla with close to 200k miles on it and turn the key...................fires then, POOF! Long story short, original spark plugs and one of them had the porcelain disintegrate. Tried to to call the 'rents on the house phone, but of course they slept through it. I walked the 14 miles home.

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Old 05-09-2014, 08:21 AM   #18
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Change mine every 30,000 on every car I've owned. Don't care what manufacture says


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