So I left the Camera at home and I didn't get to do the DIY for you guys. I'm just trying to break it down to show you how easy it is.

I guess this would be a more advanced DIY since I'm not really showing you what I did. but it's basic common sense right in front of your eyes.

I bought the newly released NGK spark plugs to replace the OEM factory Denso spark plugs.

Tools:

10mm Socket-----RED
12mm Socket-----BLUE
12mm Wrench-----BLUE
5mm Allen Key-----GREEN
Intake Mani. Gaskets (3 Pairs)-----YELLOW
Extension
Spark Plug Socket or 16mm Socket

I've marked the pictures with certain colors as to what tool you will use.


Pic 1

Pic 2

Pic 3 - All you have to do is remove the Intake for the left side spark plugs.

Pic 4

Pic 5


after you remove that there should be connectors attached to the spark plug tubes. remove those. each tube has a 10mm bolt holding it down. remove that. then use your extension and spark plug socket to remove your spark plugs.

hope this helps!

sorry in pic 5 it says look at pic 4 for reference but it's actually pic number 1. pic 4 was the file name :X

Heres the Link to the NGK spark plugs thread.

https://www.clublexus.com/forums/is-...ailable-3.html

this took me about an hour and a half cause I didn't really know what to do at all. and that 12mm bolt behind the manifold is a BEEEECH

I have about 67k miles on my car. My OEM stock Denso plugs were still pretty good. so those who debate on changing them at 60k or 100k.. they will last till a 100k np IMO. I just like to change stuff out early to make the car last just like how I change my oil every 3k with synthetic when it's not necessary and can last till 5k. lol

 

Good job man

 

Lol, nice to have pics Mistaboi, but you must've drew those circles in less than a minute total!

Great job

 

jeeechzzz soo much work for just stupid spark plugs >.<
soo how about a rating on them?

 

the hardest part is taking off the manifold to get to the right side that's all.

IDK about ratings.. I say it's as easy as installing coilovers? haha idk!

Now that I know what really needs to be done I think I can get em done in 30-45 minutes

 

Ummm I didn't remove anything when I changed mines. The most I did was unbolt something to move out of the way but nothing like you did haha

 

Haha trust me i looked for all kinds of shortcuts. YOU DONT HAVE TO TAKE OFF THE INTAKE. Just force the wires out the way to give you clearance for the left side (passenger side). But as for the drivers side. Theres no way in hell you can get the middle spark plug cause theres no room to pull the tube thing because the stock manifold is in the way

 

I didn't remove the manifold at all throughout the whole thing so I don't know what you're talking about haha

 

You ABSOLUTELY do not need to remove the manifold to do this (at least on a 350). I have done my plugs 3 times already and I never even thought about removing my intake manifold.
Nice write up!

 

Im almost positive the 250/350 manifolds are different so maybe on a 250 you need to remove it?

 

dealer $500, easiest method!

 

Did you notice any difference after the install ? smoother idle ?

 

250 is only direct injection. 350 has port and direct injection. so, yep the manifolds should be different.

 

$500 to change spark plugs! lol

Koz

 

Well can the mods change the title and add 250 owners lol damn i wish i got a 350 haha

touge i only drove it 5 miles home lol in my head it felt smoother :P

500 to change spark plugs??!? F that! Lol