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04-16-2011, 09:09 PM | #1 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
Location: LI, New Yawk
Posts: 2,063
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Changed my plugs after 38k (PICS)
Car left the factory with NGK, Toyota dealers sell DENSO replacements. Car seems to run a LOT better now. I don't care what they claim, I ain't leaving my plugs in for 100K.
NOTES: 1)The factory plugs I removed are covered with what appears to be sticky cosmoline on the threads, like the stuff they rub down old military rifles with! That's what it smells and looks like.... It's NOT motor oil. 2)There appears to be a "pad" attached to the inside of the hook part of the plug across from the iridium center electrode. Never seen that on any other plug before. 3)The iridium is like a pin tip, hard,brittle and delicate. $38 shipped Priority mail from Covina Toyota in Cali via Ebay.... The pics are from a Blackberry, so please excuse the quality.
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04-16-2011, 09:14 PM | #2 |
DWEED
Drives: 3DR 2008 Metorite Metalic Join Date: Oct 2008
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Were they easy to change?
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Making a decision without following it with an action is still a fantasy. |
04-16-2011, 09:51 PM | #3 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
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You need a 10mm socket to remove the engine cover bolts (4) first.
Under there you will see the four coil packs that are held down by another four 10mm bolts. You would need to unplug the connectors first. After that the coil pack pulls out and the hole in the valve cover is exposed, that's where the plug is. A 5/8 spark plug deep socket is needed to get the plug out. After installing the plugs, a torque wrench is required to properly tighten them. To answer the question, no it's not hard to do IF you have the right tools and know how/confidence.
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04-16-2011, 10:00 PM | #4 |
Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009
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Agree with 100,000 miles seems too much . I'll usually get the iridiums changed at 70,000 > 80,000 miles . Did so with a 2000 Corolla and the fuel economy got bumped up a bit . Think they were NGK . Let us know if you get any increase in gas mileage . Don't do plugs for aluminum blocks , the old cast iron yes . Thanks for the post .
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04-16-2011, 10:21 PM | #5 |
Drives: yaris 3 door Join Date: May 2010
Location: Midwest
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Did my 08 sedan (52k) two weeks ago and the plugs were identical save for the screws which only had black carbon looking build-up on the half closest to the tip.
Same result as you though- Much, much smoother ride and far better acceleration. |
04-17-2011, 12:31 PM | #6 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
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Yeah, it DOES really make a difference! Worth doing...
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05-04-2011, 04:02 PM | #7 |
TRIM HUNTER
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i achieved same results!
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http://rocklandtoyota.com/IFrame.aspx?iFrameID=2388 TOYOTA PARTS AT A DISCOUNT........ |
04-16-2011, 10:20 PM | #8 |
Drives: 08 Yaris sedan auto / Fit auto Join Date: Oct 2009
Location: northeast
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Did you ever use CHEVRON Techron or SHELL V-Power for F.I. / fuel system cleaner before the change ? How did the plug for the #1 cylinder look ? Any different than the others ? All seem to be in same condition .
Last edited by Hershey; 04-16-2011 at 10:30 PM. |
04-17-2011, 12:30 PM | #9 |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
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Never used any Techron, etc. all the plugs look as pictured, the same.
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04-16-2011, 10:57 PM | #10 |
toyota
Drives: 2007 Yaris RS Blazed Join Date: Oct 2006
Location: toronto, canada
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Make sure u guys check the spark plug gap still
by the way I think denso only last 30k miles vs ngk iridium 120k miles Last edited by marcus; 04-16-2011 at 11:29 PM. |
04-17-2011, 12:47 PM | #11 | |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
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Quote:
DENSO sells two types of iridium plugs; IK16 is the "regular" Iridium plug you're writing of. SK16R11 is the "long life" Iridium OEM replacement part they market that the dealer sold me.
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01-02-2019, 09:58 PM | #12 | |
Drives: 2007 Yaris Hatch Join Date: Feb 2007
Location: Chicago
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Quote:
The ik16tt is the standard iridium. The sk16r11 is the iridium long life. |
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01-03-2019, 08:17 AM | #13 |
Drives: 2007 Join Date: Feb 2014
Location: motown
Posts: 339
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Your 7 years late.
It's all in the timing, |
04-17-2011, 03:29 AM | #14 |
NGK sparks are way better than the Denso spark plugs, nice write up Aux, I changed mine when she had 25000, and again when she hit 50000, soon to be changed again lol
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04-17-2011, 03:35 AM | #15 |
Modded Moderator
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What is the proper gap? I'm 95k miles on the OEM setup and need to start thinking about these things.
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04-17-2011, 10:21 AM | #16 |
toyota
Drives: 2007 Yaris RS Blazed Join Date: Oct 2006
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04-17-2011, 12:40 PM | #17 | |
Drives: 2008 HB, A/T, Power W/L/M Join Date: Oct 2008
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Quote:
NGK are all Japan made, DENSO are a mix of Japan/USA parts, see box pic...
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04-18-2011, 04:38 PM | #18 |
Drives: 3-door hatch Join Date: Oct 2010
Location: Los Angeles
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Since you broached the subject, why is NGK better than Denso? In fact, I've always wondered why people say one company's plugs are better than another? To me, plugs are like rocks; very simple. They just consist of an electrode, insulator, and a gap.
I use standard resistor Densos in my 1988 Toyota Pickup. The truck has 180k miles on it and it is on its third set of plugs. The first set lasted 100k and the second set lasted 70k. SUre the gap was something like 0.125" but otherthan lower gas mileage, the truck ran fine with 100k mile plugs in it... I usually run just Densos in my Toyotas because that is what usually comes in them (I believe Denso and Toyota are related somehow). |
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