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Discussion Starter #1
What is the recommended spark plug for the 2011 Rav4 V6, and what is the temperature range for that plug?


Found a few very good threads on this:


http://www.rav4world.com/forums/99-4-3-mechanical/176817-spark-plugs.html


But wanted to check if there was anything different for the later V6 Rav4 models regarding spark plugs? I'm imagining there wouldn't be. So far I'm seeing the options on Amazon as:


Denso (3426) FK20HR-11 Iridium Long Life - https://www.amazon.com/gp/product/B002FOF1QW/ref=ox_sc_act_title_4?ie=UTF8&psc=1&smid=ATVPDKIKX0DER


Denso (5344) IKH20 Iridium Power - https://www.amazon.com/gp/product/B000CJ46HW/ref=ox_sc_act_title_3?ie=UTF8&psc=1&smid=ATVPDKIKX0DER


NGK (6619) LFR6AIX-11 Iridium IX - https://www.amazon.com/gp/product/B001RLTZC0/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=ATVPDKIKX0DER


NGK (6176) DILFR6D11 Laser Iridium - https://www.amazon.com/gp/product/B001RLXCAQ/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=ATVPDKIKX0DER


Amazon says all 4 of the options fit, and I believe the first one I listed is the OEM one. Any idea on temperature ranges for these? Also curious what gap the V6 wants on its plugs?
 

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Denso is OEM and is what I put in every Toyota/Scion/Lexus that comes into the shop for a tuneup.

I hate to complicate things, but there are three possibilities depending on which Denso plug you want.

3426 : Iridium Long-Life (SIP)

4704 : Iridium TT

5344 : Iridium Power

http://densoautoparts.com/find-my-part/vehicle-selection

They gap at .044 You have the same engine that is in my 09 Avalon and I would use 3426 also.

Heat range used to be critical and was rarely deviated from unless granny kept fouling out spark plugs, so you would install a hotter plug. If Leadfoot Larry drove the car and the porcelains were blistered then you go a heat range colder. I haven't heard that recommended in many years. Stick with the stock heat range spark plug for your engine.
 

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I recently ordered the NGK Iridium 6176 (gap @ .044") / for our 2008 RAV4 Limited v6-3.5L.
https://www.amazon.com/gp/product/B001RLXCAQ/ref=pd_lpo_sbs_dp_ss_1?pf_rd_p=1944687682&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B00BRSR3IG&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=GVQG3B2TD70DH0VH05EQ

Per my parts manager friend:
- NGK has made DENSO plugs, for over a decade / all made in the same production facility

NGK (6176) DILFR6D11 Laser Iridium Spark Plug

Product Description
Laser Iridium Spark Plugs provide superior ignitability and long service life. Smallest tip diameter available iridium/platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions. Laser welded Iridium center electrode tip ensures high durability and greater spark. Platinum disc welded to backside of ground electrode provides long life. Longer insulator nose prevents fouling, corrugated ribs on insulator prevents flashover, and the triple gasket seal eliminates combustion gas leakage. Faster starts and quicker acceleration. Better fuel economy and lower emissions, trivalent metal plating for superior anti-corrosion and anti-seizing.
 

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Discussion Starter #4
thanks for the info - yes, as I understand it ngk and denso are pretty much one and the same.


I decided to go with denso ikh20 for the rav4, and ik16 for the corolla
 
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