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Hi all! I have a 2005 DC 4x4 4.7 which is due for spark plugs.
I read about using the 6418 NGK Iridim plug gapped at .032 in the DIY section.
My owners manual makes reference to NGK IFR6A11 with a gap of .043, which the parts store was able to cross reference to NGK 6341 with a gap of .032.
I also read elsewhere that NGK has acknowledged that their website chart is wrong and that they recommend NGK 3764 with a gap of .044.
Has anybody else ran into this?
Any input would be greatly appreciated.
 

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but under the hood of my 05 it says to gap .039-.044?
 

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That is a considerable difference in gap. I (and Remmy too) have a pre vvt-i motor and my plugs are gapped at .032 if I remember. I am not sure if the VVT-I motor calls for a different gap, but whatever you do stay away from Bosch plugs, they don't seem to work well for our trucks for whatever reason. Denso was what I wanted, but couldn't find so I went with NGK.
 

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but under the hood of my 05 it says to gap .039-.044?
in my 06 service manual it states .039 - .043 in. which means I have mine gapped improperly :eek: I went by the TS spark plug sheet and set mine to .032. I checked and there is no spec under the hood for plugs, only vacuum, belt, and valve information.

I may have to change that just to see what happens.
 

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I ran into this issue also. It appears that Autozone and Advance Auto both list the pre-VVTi spark plugs even for the 2005+ VVTi, including the 4.7 on the 2007+ models. Oreilly and Rockauto list different plugs for the 2005+ gapped at 0.044.

Pre-VVTi gapped at 0.032
NGK 4867 IFR6B-K Laser Iridium ($13.49 mostly)
NGK 6418 BKR6EIX Iridium IX ($6.99 mostly)
NGK 2215 BKR6EP-8 Laser Platinum ($5.89 advance, $9.99 autozone)

VVTi gapped at 0.044
NGK 4589 IFR6T11 Laser Iridium ($6.99 mostly, $9.99 autozone)
NGK 3764 BKR6EIX-11 Iridium IX ($6.99 mostly)
NGK 2978 BKR6EP-11 Laser Platinum ($8.49 oreilly, $6.38 rockauto)
Denso 3297 SK20R11 Iridium Long Life (listed as OE at Rockauto.com $7.81)

My RAV4 also uses the IFR6T11. Are there any advantages of using the Iridium IX over the Laser Iridium? The NGK website marks them as superior performance--but I'm not sure what that really means. The Laser Platinums seem to have inferior life compared to the Iridium, but aren't any cheaper, but I listed them just in case.
 

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Also toyota calls for iridium plugs for vvt-i engines.
 

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There is nothing under the hood of my 05 D/C that says anything about the spark plug gap. The owners manual says to use .043. I changed my OEM plugs at about 70,000 miles and quite frankly they still looked like new and had a good gap. I don't remember any being more than a couple of thousandths off. I used NGK 4589's and gapped them at .043. I might look at them again as the truck closes in on 200,000 miles. Iridium plugs fired by a good system simply will not wear out.
 
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