What Spark Plug does your owners manual indicate for your 4th generation 4runner?

[EDGE]

V6 should have Platinum plugs good for at least 90k, I had a 96 Nissan Pathfinder put 40k on it and realize the plugs where only meant for 15k:

Gas mileage was fine, car passed smog checks every year and they did not even tell me I need new plugs, everything on cars is underrated, they have to cause of the people who will knowingly push the vehicle to twice the actual mileage the part should have been replaced at:

 

[TRD04RUNNER]

LOL i never herd of Iridium plug lasting 120k! maybe platinum. denso do make a iridium plug for the 4.0l v6 part# IKH20

denso

 

[tkr128]

V6 plugs need to be changed at 30k mile intervals. I just had mine changed. I'm wondering why Toyota decided to use copper plugs since this is a new engine and most manufacturers are equipping new engines with iridium/platinum plugs.

 

[Kanab]

LOL i never herd of Iridium plug lasting 120k! maybe platinum. denso do make a iridium plug for the 4.0l v6 part# IKH20

denso

Checkout the maintaince guide for the V8. Also know guys with 100 series 4.7 V8's that did not change for the recommended 120K miles and did not have any performance problems and when they did change the plugs they still looked good. Hey I've never driven the same vehicle for 120K miles and doubt I ever will so its not a problem for me. But I plan on selling my 4runner at 80K miles and will not be changing the plugs during my ownership. Some dealer will recommend changing things way early since they make more money. They aren't hurting anyone except in their pocket book.

 

[bbumbles]

V6 uses copper plugs and need to be changed every 30K no if and or but's about it. I just did a set at 50K and they were all worn out.

 

[Kanab]

Here is a on line resource for all your maintanance questions - http://smg.toyotapartsandservice.com/guides.php?vehicle=4Runner&year=2004&s=6&submitbtn=Search

 

[seconds2none]

2004 V6 4R comes with NON-Platinum Plugs. There is NO after market Iridium Plugs for V6 Model.

 

[greasefingers]

I am almost positive that one can use Iridium plugs for both the V6 & V8 engines. They both use 14 mm threads. The V6 is 19 mm long and the V8 has a 26.5 mm thread length. So the plugs cannot be shared but the correct ones can be ordered. It's the heat range that matters.

 

[greasefingers]

Here is the Denso Iridium plug for the v6

http://www.densoproducts.com/resultsSearch.asp?s=9&txtPartNumber=IKH20

 

[greasefingers]

I just pulled a plug from my v8. The Iridium plugs are strange as far as the electrode. It is conical even pointy rather than a sharp cylindrical electrode. They look great of course, with only 43,500 miles but I was still curious. I will swap them when I do the timing belt at (90 to 100 k miles)

 

[greasefingers]

Thinking even more about Iridium plugs, has anyone tried to remove plugs that have been left in an engine for 100 k miles? I may just remove all of mine at 50 k miles to lube up the threads and place a dub of silicone on the rubber that contacts the plugs. I would hate to have difficultly with the threads after sitting so long and I have lost a chunk of rubber insulator from the wire that has been heat fused to the plug, in the past. Just a thought right now.

 

[NCSCOTT]

V-6

I Own a V-6. I recently replaced the plugs with Denso K20HR-U11 plugs. 1 of the 2 recommended in the owners manual.

In the Maintenance Log on the 30K mile service for SUVs and Trucks: 30,000 Miles or 36 Months "Replace spark plugs (4Runner w/1GR-FE, Sequoia, Tacoma, Tundra) Note2"

Note 2 states "Required under the terms of the Emission Control Warranty."

When I replaced mine I found 3 NGK plugs and 3 Denso Plugs (This is already in another thread.) Niether type seemed more worn. All six plugs still were prefectly gapped at .043". I for one will continue to Replace them every 30k to maintain my warranty.

 

[greasefingers]

They only benefit a Iridium plug has over another type is longevity. So one could use a standard non-iridium plug with the v8 and change it more often, as long as the heat range is the same.

 

[seconds2none]

Replacement Iridium Plugs

Denso has Iridium plugs for the 2004 V6 model. I have order it and should be getting them soon. Although a plug has a life up to 100K, it should be change before that time for better starting and feul economy. Worn out plugs is bad health for you car.