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Spark Plug Change and Cylinder Head Images On High Mileage GS
Changed the spark plugs on my 2013 GS with 205k miles. They were changed last around ~100k from the previous owner as far as I can tell by the reminder set in the car and the condition of the plugs.
Two of the spark plugs were not tight enough and had some oil leaking in to the top - you can see those cylinder heads had more carbon buildup than the other ones which were very clean and had little to no carbon build up. The coil packs were dry and looked new as well.
Oh wait.... the GS350 Gen 4 is a self cleaning motor according to those experts here.
As I have stated before, I have seen the same on a 90k GS350 motors with a Bore scope, and others have too, if they choose to post about theirs.
Unless we can see the fine wire coil windings, inside the ceramic that's only been fired at 40k volts 100 million times. lol! What's so great about the plugs that have been in there?
Those spark plugs are good for another 200k miles with no decrease in performance or fuel mileage...
Im sure these plugs would still work for another 200k but performance was definitely noticeable after I changed them. GS got a lil more pep in her step now.
Oh wait.... the GS350 Gen 4 is a self cleaning motor according to those experts here.
As I have stated before, I have seen the same on a 90k GS350 motors with a Bore scope, and others have too, if they choose to post about theirs.
Unless we can see the fine wire coil windings, inside the ceramic that's only been fired at 40k volts 100 million times. lol! What's so great about the plugs that have been in there?
A little carbon is totally normal and well this is proof that they are kind of self cleaning via the dual port injection system..if you compare the two cylinders heads the one with the leaky spark plug had more carbon build up cause it was leaking oil into the chamber and letting it gunk up while the other head had almost no carbon build up. I’m convinced it works and that’s why the 2GR-FSE engines are solid.
This comes up all the time...plug change intervals. TBH, Not being a car expert but knowing enough to be reliably dangerous I would rather just spend the 100 bucks and 2 hours time doing this for my own sanity. I am not letting plugs in any vehicle go past 75-80k ever for my own peace of mind. This is a cheap fix on a Sunday morning in the 4GS.
Changed the spark plugs on my 2013 GS with 205k miles. They were changed last around ~100k from the previous owner as far as I can tell by the reminder set in the car and the condition of the plugs.
Two of the spark plugs were not tight enough and had some oil leaking in to the top - you can see those cylinder heads had more carbon buildup than the other ones which were very clean and had little to no carbon build up. The coil packs were dry and looked new as well.
Unless you are running propane, E85 or some other fuel that burns more completely than gasoline, there will be carbon on the pistons and spark plugs. You are half way to creating man-made diamonds, aka, carbon, heat and pressure.
If the car had no symptoms and was not throwing any trouble codes, you did suggested preventative maintenance but I 100% doubt you experienced anything but the placebo effect. Butt dynos are not evidence of improvement. At a minimum, you would need before and after 0-60 or quarter mile times to verify any real world improvement.
Bone stock 2013 GS 124k miles, nothing but oil and air filter changes. Filled up on Monday and soft pedaled it to work on I-95, took this pic in the parking garage. I wonder how much better I could do with new spark plugs?
Bone stock 2013 GS 124k miles, nothing but oil and air filter changes. Filled up on Monday and soft pedaled it to work on I-95, took this pic in the parking garage. I wonder how much better I could do with new spark plugs?
None!
New plugs might help with an all-out drag race but not on an MPG run if it isn't throwing codes. I've had other cars throw miss codes when you didn't even notice it.
Bone stock 2013 GS 124k miles, nothing but oil and air filter changes. Filled up on Monday and soft pedaled it to work on I-95, took this pic in the parking garage. I wonder how much better I could do with new spark plugs?
That's great, I can hit 36 also. Its been my max. How long have you had you GS? Was it serviced at Lexus?
Bone stock 2013 GS 124k miles, nothing but oil and air filter changes. Filled up on Monday and soft pedaled it to work on I-95, took this pic in the parking garage. I wonder how much better I could do with new spark plugs?
None at all - ZERO! You'd be better served lightening the load by visiting the restroom before traveling to work. Or monitoring the wind direction for a hopeful tailwind.
Are those regular copper plugs?
My GS250 “requires” iridium plugs.
Changed plugs at only 90k km as the service manual says and they were clean. Used but clean, replaced with Iridium plugs of course.
Edit: Nevermind, I looked again and it says Iridium on them and they look like mine did.
04-26-22, 10:58 AM
Spark Plug Change and Cylinder Head Images On High Mileage GS
I would rather just spend the 100 bucks and 2 hours time doing this for my own sanity. I am not letting plugs in any vehicle go past 75-80k ever for my own peace of mind. This is a cheap fix on a Sunday morning in the 4GS.
