Spark Plugs Change or not at 60K?
06-09-20, 08:20 AM
#32
Lead Lap
bringing up an Older Thread rather than start a new one so Information is easier to find...hope this helps
6/2020 best pricing found for 6x:
https://www.walmart.com/ip/NGK-Laser...56cc/769252752
6/2020 best pricing found for 6x:
NGK Laser Iridium Spark Plug DFH6B-11A (6 Pack) for LEXUS GS350 F SPORT 2013-2014 3.5L/3456cc
https://www.walmart.com/ip/NGK-Laser...56cc/769252752
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kj07xk (06-09-20)
06-12-20, 06:45 AM
#33
Lead Lap
just got done doing it on the 3IS for the first time. DIYDAN and the GS is very similar except ours is going to be a bit tighter
hardest 10mm is driver side front...what i did was loosening it enough to use 1 finger on both side and twist off...DIYDAN did it with a open ended 10mm but this may be quicker on 3IS
side note: if your 16mm socket and it isn't a specific Spark Plug socket and isn't magnetized, the Spark plug may not want to come out
what i do is grab a bit of my fav. Electrical Tape (Scotch 88), grab about a 6 in piece, stick a bit in the socket (sticky side facing down), it should catch the Spark Plug...i would only do it on cold/warm engine to avoid any possible residue. DIYDAN also used Duct Tape for his extension and socket but i like Electrical Tape because it leaves zero Glue residue
side note: this has been my Favorite Tape for all things electrical related and in lieu of duct tape...Home Depot, still after many years is the best place to buy it:
https://www.homedepot.com/p/3M-Scotc...A-10/100069964
rest is pretty straight forward, hope this helps for anyone doing Spark Plugs in the future
hardest 10mm is driver side front...what i did was loosening it enough to use 1 finger on both side and twist off...DIYDAN did it with a open ended 10mm but this may be quicker on 3IS
side note: if your 16mm socket and it isn't a specific Spark Plug socket and isn't magnetized, the Spark plug may not want to come out
what i do is grab a bit of my fav. Electrical Tape (Scotch 88), grab about a 6 in piece, stick a bit in the socket (sticky side facing down), it should catch the Spark Plug...i would only do it on cold/warm engine to avoid any possible residue. DIYDAN also used Duct Tape for his extension and socket but i like Electrical Tape because it leaves zero Glue residue
side note: this has been my Favorite Tape for all things electrical related and in lieu of duct tape...Home Depot, still after many years is the best place to buy it:
https://www.homedepot.com/p/3M-Scotc...A-10/100069964
rest is pretty straight forward, hope this helps for anyone doing Spark Plugs in the future
The following users liked this post:
kj07xk (06-12-20)
07-04-20, 07:27 AM
#34
Intermediate
IS350 2104:
I just finished changing my spark plugs at 63,000 miles and found all of the old factory installed plugs were gapped too small. All were between 0.037” - 0.038” when the proper gap is 0.043”. I will be checking my mpg closely. This has to have an impact on performance and gas mileage. I know the manual says dont gap new plugs but that is just foolish to assume a mass produced item like a spark plug can be accurately gapped at the factory. My new plugs were gapped at 0.040” still small according to spec. A few were rough and tight to unscrew, so the new plugs got a little copper anti-seize before going back in.
I just finished changing my spark plugs at 63,000 miles and found all of the old factory installed plugs were gapped too small. All were between 0.037” - 0.038” when the proper gap is 0.043”. I will be checking my mpg closely. This has to have an impact on performance and gas mileage. I know the manual says dont gap new plugs but that is just foolish to assume a mass produced item like a spark plug can be accurately gapped at the factory. My new plugs were gapped at 0.040” still small according to spec. A few were rough and tight to unscrew, so the new plugs got a little copper anti-seize before going back in.
07-04-20, 06:47 PM
#35
IS350 2104:
I just finished changing my spark plugs at 63,000 miles and found all of the old factory installed plugs were gapped too small. All were between 0.037” - 0.038” when the proper gap is 0.043”. I will be checking my mpg closely. This has to have an impact on performance and gas mileage. I know the manual says dont gap new plugs but that is just foolish to assume a mass produced item like a spark plug can be accurately gapped at the factory. My new plugs were gapped at 0.040” still small according to spec. A few were rough and tight to unscrew, so the new plugs got a little copper anti-seize before going back in.
I just finished changing my spark plugs at 63,000 miles and found all of the old factory installed plugs were gapped too small. All were between 0.037” - 0.038” when the proper gap is 0.043”. I will be checking my mpg closely. This has to have an impact on performance and gas mileage. I know the manual says dont gap new plugs but that is just foolish to assume a mass produced item like a spark plug can be accurately gapped at the factory. My new plugs were gapped at 0.040” still small according to spec. A few were rough and tight to unscrew, so the new plugs got a little copper anti-seize before going back in.
07-04-20, 07:06 PM
#36
IS350 2104:
I just finished changing my spark plugs at 63,000 miles and found all of the old factory installed plugs were gapped too small. All were between 0.037” - 0.038” when the proper gap is 0.043”. I will be checking my mpg closely. This has to have an impact on performance and gas mileage. I know the manual says dont gap new plugs but that is just foolish to assume a mass produced item like a spark plug can be accurately gapped at the factory. My new plugs were gapped at 0.040” still small according to spec. A few were rough and tight to unscrew, so the new plugs got a little copper anti-seize before going back in.
I just finished changing my spark plugs at 63,000 miles and found all of the old factory installed plugs were gapped too small. All were between 0.037” - 0.038” when the proper gap is 0.043”. I will be checking my mpg closely. This has to have an impact on performance and gas mileage. I know the manual says dont gap new plugs but that is just foolish to assume a mass produced item like a spark plug can be accurately gapped at the factory. My new plugs were gapped at 0.040” still small according to spec. A few were rough and tight to unscrew, so the new plugs got a little copper anti-seize before going back in.
07-05-20, 01:31 PM
#37
Intermediate
[/size]
Take it for what its worth. I have a 2001 is300 with 292,000 miles. 200k put on by me. At 200k I installed NGK Iridium plugs and 15,000 miles later My mpg dropped from 23 to 19 for no reason. I found that the welded pucks on 3 plugs had fallen off. I contacted NGK and they would not reply. For me, I will never use their plugs again. I replaced them with Denso and the car has run perfectly since then. Problems happen but their customer service is non-existent.
07-06-20, 07:44 AM
#38
Take it for what its worth. I have a 2001 is300 with 292,000 miles. 200k put on by me. At 200k I installed NGK Iridium plugs and 15,000 miles later My mpg dropped from 23 to 19 for no reason. I found that the welded pucks on 3 plugs had fallen off. I contacted NGK and they would not reply. For me, I will never use their plugs again. I replaced them with Denso and the car has run perfectly since then. Problems happen but their customer service is non-existent.
For is350 2015 - there is only one specific model and that is it. DENSO FK20HBR11
07-06-20, 09:49 AM
#39
Intermediate
Take it for what its worth. I have a 2001 is300 with 292,000 miles. 200k put on by me. At 200k I installed NGK Iridium plugs and 15,000 miles later My mpg dropped from 23 to 19 for no reason. I found that the welded pucks on 3 plugs had fallen off. I contacted NGK and they would not reply. For me, I will never use their plugs again. I replaced them with Denso and the car has run perfectly since then. Problems happen but their customer service is non-existent.
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sunamer (07-06-20)
07-06-20, 04:00 PM
#40
Intermediate
I had either bought them from Rockauto.com or advanceautoparts.com. Both solid companies. I consider auto parts on ebay to be either fakes or defective returns being re-sold.
07-06-20, 11:27 PM
#41
Lead Lap
Take it for what its worth. I have a 2001 is300 with 292,000 miles. 200k put on by me. At 200k I installed NGK Iridium plugs and 15,000 miles later My mpg dropped from 23 to 19 for no reason. I found that the welded pucks on 3 plugs had fallen off. I contacted NGK and they would not reply. For me, I will never use their plugs again. I replaced them with Denso and the car has run perfectly since then. Problems happen but their customer service is non-existent.
i am with you, if i got a problem with a Manufacturer, I messaged them, and i don't get a REAL response....i usually stop using that brand altogether
07-06-20, 11:34 PM
#42
Lead Lap
FYI: these are the OEM Plugs out at 60K for reference in case you want to compare with yours
07-07-20, 11:52 PM
#44
Pole Position
Y’all non 4 banger turbo peeps be glad because it’s every 40k miles for us that we are supposed to replace spark plugs lol. I’ve had other cars where the interval was indeed about 80k to 100k miles using Denso or NGK iridium plugs.
07-08-20, 06:57 AM
#45
Mine is 6 bangers and service manual says replace plugs at 60K. I'm still doing it at 40K and I really wanted to see all the 6 plugs look like (@40K). Since I will going to that route, might as well replace them.
Last edited by s3v3n; 07-08-20 at 07:03 AM.