Spark Plug replacement

Good evening 1st genners, I am back once again because I want your opinions on some spark plugs in thinking of buying now that I have the budget. I have a 2006 Sequoia Limited with the 4.7 V8, and just bought it a couple months ago. The plugs have never been replaced (I’m at 180,500 miles) as far as I know after going through all of the service records. First off, I am going with the Denso TT (Twin tip) 4702 from Rockauto. Yes I’m choosing Denso for the replacement just because, that’s what’s already in there. I have NGKs in a relative’s Honda and they are great, no hate towards them. Now this plug is advertised as being more fuel efficient, is that just a marketing gimmick or are these good? Lastly, the pre-set gap is 0.040 when the manual calls for 0.043-0.044 I believe. Let me know your thoughts. I want to get these replaced ASAP as preventative maintenance.

 

Let us know if the plugs don’t break coming out. +180k is a lot of miles.

 

When you put it like that, should I have a mechanic do the job? I just DIY things, but I have no damn clue on how to extract a broke spark plug…

 

More efficient is just as you said... a gimmick. I've never had good luck with the platinum or tritiums in the 4.7, for what it's worth. They haven't lasted long and given me a rough cold-start.

 

Maybe its not as bad for you living in a nicer climate. You don’t get severe cold like we do.

Maybe some of our warm climate friends here can comment on getting out +150k plugs.

 

Open your owners manual and use one of the plugs specified therein. I do not believe that Twin Tips are correct for the 2UZ.

 

I wouldn’t worry one bit about breaking plugs, This isn’t a 4.6/5.4 Furd.

 

Original plugs would have been:

DENSO KS20R11 (3297) (Iridium Long Life)
NGK IFR6A11 (4589) (Laser Iridium)

 

Yeah, I’m thinking I’m just gonna go with the regular Denso Iridiums with the proper gap. Besides, I already priced out the plugs plus shipping for RA and it costs more than ordering online (automatic discount when you do) from my local stealership.

 

You're not supposed to gap Iridium plugs. They come pre-gapped and with protection to make sure the gap can't be closed. Attempting to gap can damage the electrode.

Note: "KS" is a typo in the owner's manual, it's supposed to be SK. I've made this mistake a number of times also.

I personally bought NGK with the correct model number "SK20..." Just don't buy online. I'm not typing out the whole part number b/c the forum software will auto-link it to scAmazon and they're one of the largest sources of knockoff spark plugs on the internet.

And @ OP, don't use anti-seize on the plugs when installing. I wouldn't be super worried about snapping anything off in the hole.