What are you guys using for spark plugs
mine is a 2010 gs350 awd

1- are you using oem
2- can you use other brands
3-is it faily easy job
4 what should i look out for
5- if you have any links can you post them
thanks guys

 

1) Nope\Yes
2) Yes, I'm using DENSO 4705 Iridium TT. Same Twin-Tip design as the OEM but way cheaper than the dealership. DENSO is OEM
3) It's fairly easy. Driver side is easy to work on, the Passenger will be a bit more involving. You will need to remove the intake.
4) Just take your time. I didn't run into anything major.
5) I bought all my stuff from rockauto.com.

 

1 - https://shop.advanceautoparts.com/p/...473/10477937-P
There is also a rebate, I got an $18 gift card. AA PMED RA with 5% discount (I sent them a screen shot). AA is an authorized denso dealer, so no fakes, peace of mind.

2- Not suggested, but there is another denso plug which cost less. I have it in other cars and it works well. Supposedly gives a bit more performance(thinner fire area), but supposedly isn't sold as long life. If you are on a budget, a good choice though. Lexus dealer here said NGK would also be an option, but they are actually more expensive. Copper and Plat is available, but not a good idea in my opinion. If they are suggesting 60K intervals with iridium plugs, those probably have a very short life.

3- I thought it was very easy, there some 4gen yt vids but it is identical. There is just a bracket to remove on the driver side with a few nuts and bolts. I also cleaned the TB, use a minimal amount of carb cleaner on a brush and tilt away from the electronics side.

4- I use a torque wrench, I am from the Ford world where spark plug torque is very critical. Good idea here too because it will make them easy to change again. These are crush plugs unlike other makes tapered seat. I believe 18-20ft\lbs (saw +- 3 from that number in places). I also put a bit of silicon lube on the inside of the coil boots and on the head grommet, I worked for Ford and was always told to do that. Purpose is to displace any moisture, and make it easy in the future to remove. That is probably optional though.

5- You can search yt for GS350 plugs.

 

Another heads up is to avoid ebay toyota plugs, there are many fake oem and denso plugs out there flooding the market.

 

Advance Auto, Autozone and Toyota are officially Authorized by Denso.

 

thanks guys good info
whats the differance with irridium plugs

 

thanks guys good info
whats the difference with irridium plugs
and what size socket

 

Iridium lasts very long, they say it came to earth with the asteroid that wiped out the dinosaurs :lol:. It has a very high melting point and takes abuse. Copper and platinum have a different service interval. Some people say copper is a bit better of a conductor for more performance, whatever. Iridium is better than both. I think they are trying to minimize any misfires over the life of the plug to save the cat, so they specify that.
Size? Standard spark plug socket that works on Fords and tons of other cars :lol:.99% sure it is 5/8'ths.

 

ill check advance auto parts or autozone

 

would the copper be a better choice from advance auto parts

 

Copper wont last nearly aslong as iridium, 30k miles vs 100k that you will get out of the iridium and the 3GS engine is sensitive to spark plugs.

 

Yes, and 3 Cu plugs $=$ 1 Ir plug. The stock plugs have 3 ground electrodes, they want to insure there are absolutely no misfires due to spark. Cat converters can be very expensive. Your average driver may keep plugs in for 150K, and there is that factor of safety. And, most drivers wouldn't dare touch their Lexus, so you see how a 30k tuneup could be cost prohibitive, so IR is a good choice.

That being said, if you keep an eye on things coppers WILL likely work. Some performance enthusiasts insist on copper because of conductivity and performance. Despite being cheap, they are probably the best (but short lived). Make sure the gap is correct. I know I have some small engines though, and they didn't run well when I tried a long life plug. The old plug ran and started perfectly afterwards. You have to try, you can always exchange them in advance auto.

From some cursory research, copper is 3x more conductive than Iridium and 6x Platinum. Cu is great at heat dissipation too. In the real world, that means very little though. Cu may give an extra 1/2 - 1 hp.

 

gap for iridium =?
gap for copper =?

so the once at advance auto are the same as stock ...
all i want is stock

 

He already answered that question in post #2, item #2. You can get them from Advance or Rock Auto.

 

OEMs are pre gapped. DO NOT GAP IRIDIUM PLUGS, unless you really know what you are doing. Those tips are brittle.

The link in the third message I posted will get you the plugs, use WELCOME code when you sign up for speedperks to get $30 off. If not there are other coupons if you search. You also have a rebate offer.