You don't need to replace them to make sure they don't seize in their threads, just remove them do a look-see and go "WoW, they look like new still!!" then put them back with a coat of anti-seize on them.
2005 Rockwood 26' 5'er, Michelin LTX MS tires, 270 watts of solar on the roof, 4 T-105 golf cart batteries, Xentrex converter, Outback FX2012T inverter/charger.
If you can't take it with ya, why bother with an RV!
2000 Tundra (bought 9/9/99)
JBA Headers
Gone but not forgotten~
Replaced mine today @ 50 K. I run my truck with propane wich burns a lot hotter than gasoline. So thats why i wanted to them exchanged. Bought 8 new iridiums. Took the old ones out and noticed they still looked like new. Replaced them anyway. They came out pretty easy.
I just changed my spark plugs on my 2007 Toyota Tundra V6 4.0 with 35,000 miles yesterday. It took me less than 1 hour and it was my first time doing it. Next time I'm sure it will take like twenty minutes. I recommend getting the plugs at the dealership. The plugs on the left were easy to get to after moving the air filter and intake out of the way use a 10mm socket to remove the ports and a 5/8" plug socket to remove the plugs. The plugs on the right were a bit trickier to get to but if you get a long extension on your ratchet it shouldn't be too difficult. I had to remove a brace of sorts (use a 12mm socket for the brace) to access one of them but that was easy to remove and put back. When loosening the old plugs if feels like its taking forever but just keep at it and they come out eventually. Do the job yourself it cost me $18 for my plugs and I'm sure the mechanic thieves would have charged me well over $150. I would definitely change them though because if Toyota recommends it at 30,000 it probally should get done because generally they try and reduce overall maintenance costs as a good selling point. i.e 100,000 mile transmission fluid, fuel filter etc.
I just changed my spark plugs on my 2007 Toyota Tundra V6 4.0 with 35,000 miles yesterday. It took me less than 1 hour and it was my first time doing it. Next time I'm sure it will take like twenty minutes. I recommend getting the plugs at the dealership. The plugs on the left were easy to get to after moving the air filter and intake out of the way use a 10mm socket to remove the ports and a 5/8" plug socket to remove the plugs. The plugs on the right were a bit trickier to get to but if you get a long extension on your ratchet it shouldn't be too difficult. I had to remove a brace of sorts (use a 12mm socket for the brace) to access one of them but that was easy to remove and put back. When loosening the old plugs if feels like its taking forever but just keep at it and they come out eventually. Do the job yourself it cost me $18 for my plugs and I'm sure the mechanic thieves would have charged me well over $150. I would definitely change them though because if Toyota recommends it at 30,000 it probally should get done because generally they try and reduce overall maintenance costs as a good selling point. i.e 100,000 mile transmission fluid, fuel filter etc.
Good luck
good points...sure it will help that other V6 owner out there. jk. im sure more than just two people own a V6 Tundra...probally at least 5 people
Agreed! I wouldn't leave spark plugs in any of my vehicles longer than 60,000 miles. To the OP, I'd stick with the same factory spark plug, just my opinion.
With Iridiums I wouldn't have any issue with leaving them until recommend changing time..... 120,0000 miles. I have used Iridiums for years, they don't wear out!
.... they offer a V6 in the 2nd gen Tundra???!!!! Amazing!
(sorry, just having fun with ya, enjoy your great truck!)
2005 Rockwood 26' 5'er, Michelin LTX MS tires, 270 watts of solar on the roof, 4 T-105 golf cart batteries, Xentrex converter, Outback FX2012T inverter/charger.
If you can't take it with ya, why bother with an RV!
2000 Tundra (bought 9/9/99)
JBA Headers
Gone but not forgotten~
I am not looking forward to the time mine need replacing. Aluminum heads....hopefully they used anti-sieze at the factory and/or there are helicoils installed.
A good reason not to wait for them to seize in the head. Take them out and check them and put some copper antiseize back on them.
2005 Rockwood 26' 5'er, Michelin LTX MS tires, 270 watts of solar on the roof, 4 T-105 golf cart batteries, Xentrex converter, Outback FX2012T inverter/charger.
If you can't take it with ya, why bother with an RV!
2000 Tundra (bought 9/9/99)
JBA Headers
Gone but not forgotten~
Agreed! I wouldn't leave spark plugs in any of my vehicles longer than 60,000 miles. To the OP, I'd stick with the same factory spark plug, just my opinion.
2005 Rockwood 26' 5'er, Michelin LTX MS tires, 270 watts of solar on the roof, 4 T-105 golf cart batteries, Xentrex converter, Outback FX2012T inverter/charger.
If you can't take it with ya, why bother with an RV!
2000 Tundra (bought 9/9/99)
JBA Headers
Gone but not forgotten~
2007 tundra crew cab with a 4.7L. Iridium plugs - owners manual AND Toyota Dealership state to change the plugs in this engine every 30K
well thats ridiculous...no engine ive ever had since the 90s has needed spark plug replacement (tune up parts) till 100k miles...they can have this thing back if they cant keep up with the rest of the world....
Re: spark plugs
A lot of CID.
Re: spark plugs
jk. im sure more than just two people own a V6 Tundra...probally at least 5 people 
.... they offer a V6 in the 2nd gen Tundra???!!!! Amazing! 
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