^^^^
Just check the gap when you get the plugs.
It may not be necessary to gap them.
Mine was .032 out of the box.
That is what the Manufacturer recommends:
http://www.ngksparkplugs.com/part_fi...engineid=37362

MR LUV

 

how do you check the gap?

 

there's a small circular tool you can get at any auto store to check for the gap.
i just got me some NGK iridiums today too. 26 bucks for all four plugs at kragen auto parts
just like the original author of this thread said
immediate zip and smoother transitions.
i hope it ups the MPG too.

 

i was going to buy the NGK iridiums but went with a single tab plug. the car had NGK that were similar in it before. I warmed the car up after and it was running smoother. gonna put a bottle of fuel injector cleaner in it next fill up and it should be smooth. the idle was rough...i guess i deserved it for not changing the plugs till 55k. two of them were pretty ugly

 

I'm also at around 30K and put in a set last week. I did notice a slightly smoother idle, but no extra zip. I'm taking it in for it's 30K service this week so that should help. I got them from seller nvthai on ebay for $25.70 shipped

 

yeah i have never taken the car into the dealer for the services. it has 55k and so far ive done brakes, plugs, battery and rear gate handle. thats in 3 years. not bad. brakes are due again though wth.

 

Dude, Brakes ? I'm at 66,800 and mine haven't showed a sign of grinding yet. Are you guys also replacing your wires when you do the plugs ?

 

Same here...didn't even do the three free oil changes. Battery is probably coming due soon, but still starts strong. So far, a great little car!

jbrolowxb No. wires should be good with an inspection unless you can see a cut or other physical damage. Looked at the maintenance schedule for a 2006 and it goes to 120K/144 months without any mention of inspect or replace spark plug wires. Probably not a bad idea if you hit those upper mileage milestones.

 

did this last night! awesome!

 

I used the Denso Iridium "IR Power" plugs. They have a 0.4 mm center electrode- "the world's smallest" so I guess that's good. The NGK iridium say they have a 0.6 mm electrode. I don't know if it matters. Maybe the NGK will last longer. Denso also makes a 0.7 mm electrode "long life" iridium plug.

 

cool tips guys.

 

Definitely skinny!

Denso @ .4mm = .0157, NGK @ .6 = .0236. Thats 16 and 24 thousandths of an inch respectively! Sharper the edge/point, better and easier the arc can form. I',m sure both will serve well as Denso (Toyota OEM) and NGK are both excellent choices.

 

quick question.
i forgot to put antiseize on the spark plug before i put in the new ones
are they required? or just highly recommended?

 

not sure if the anti sieze is req. i forgot so i took them back out and put it on. car seems to be idling a little bit better.

 

Just a good idea since the plugs are steel and the head is aluminum. Dissimilar metals. Worst thing is for the threads to pull out with the plugs. Not today, but possibly down the road when you go to change plugs again.

I remember racing 2 stroke motocrossers and had a plug pull the threads out of the head. Granted, they run a lot hotter than a water cooled 4 cycle...

 

Actually the gap on these Irridium plugs should be set at .044 NOT .032. The plugs allow the use of the wider gap to create the hotter spark with the same voltage.
The wider gap is what helped increase the mpgs by about 2.
Glad you are liking them Robert. I knew you would.

 

Or you can order the NGK - BKR5EIX 11 they are already gapped to .044

Then you don't have to worry about breaking that tiny electrode.

 

im new to this whole spark plug thing, my tc has 51000 miles should i change my spark plugs? and if so wat are good sparkplugs and where can iget them...thanx alot

 

Is this number the same heat range as the other ones that are for the xB/xA?

 

new sparks huh. ive never looked into it but what all does it do for you in a tc