Stupid spark plug question LQ9
Mar 31, 2022 | 08:50 AM
#12
Mar 31, 2022 | 08:53 AM
#13
Mar 31, 2022 | 09:57 AM
#14
I haven't replaced them in probably 60k, and I don't have any issues yet. Don't know why you would expect them to not last as long. I put them in there late 2013 and they are still in there lol
Mar 31, 2022 | 10:48 AM
#15
Thread Starter
TECH Enthusiast
Joined: Aug 2015
Posts: 602
Likes: 141
From: Houston TX
Richard
Mar 31, 2022 | 01:26 PM
#16
Guess i'm not as lucky. It seems like i'm replacing plugs and wires every 2 years due to a miss.
Mar 31, 2022 | 10:08 PM
#19
I see OP got their answer, but for the few who search, or for that person who will bump this thread and make it their first post in 2034.
The Iridium plug, 41-110 (with a .040 gap) was the originally installed plug when they started the NBS/Gen III LS. I think it was in 2003, but at some point early on, they changed the plug to the platinum and it became the superseded part number. The platinum plug 41-962 (has a .060 gap). I think I have only seen them come pre-gapped, but you can use either one.
The Iridiums will last about twice as long (100k miles vs ~60K miles) but also cost about twice as much. SUPPOSEDLY the iridiums are two hairs better for performance, but if someone knows details why, they know more than I do about em. I think it has to do with the shorter gap having a "more responsive spark". I felt an improvement when I installed iridiums, but that could obviously be from just putting in new plugs so it's not really fair to mention. My guess is GM only did it, (downgraded) to save a few bucks.
In the 02 owner's manual it has the replacement plug listed as NGK PZTR5A15 (iridium)
NGK PZTR5A-15 - Cross Reference | sparkplug-crossreference.com
(The GM part number for 4.8/5.3 is PTJ14R15. For the 6.0 it is PTZ16R15, yet both have the same NGK plug number).
The Iridium plug, 41-110 (with a .040 gap) was the originally installed plug when they started the NBS/Gen III LS. I think it was in 2003, but at some point early on, they changed the plug to the platinum and it became the superseded part number. The platinum plug 41-962 (has a .060 gap). I think I have only seen them come pre-gapped, but you can use either one.
The Iridiums will last about twice as long (100k miles vs ~60K miles) but also cost about twice as much. SUPPOSEDLY the iridiums are two hairs better for performance, but if someone knows details why, they know more than I do about em. I think it has to do with the shorter gap having a "more responsive spark". I felt an improvement when I installed iridiums, but that could obviously be from just putting in new plugs so it's not really fair to mention. My guess is GM only did it, (downgraded) to save a few bucks.
In the 02 owner's manual it has the replacement plug listed as NGK PZTR5A15 (iridium)
NGK PZTR5A-15 - Cross Reference | sparkplug-crossreference.com
(The GM part number for 4.8/5.3 is PTJ14R15. For the 6.0 it is PTZ16R15, yet both have the same NGK plug number).
Apr 1, 2022 | 10:46 AM
#20
TECH Apprentice
Joined: Aug 2017
Posts: 393
Likes: 64
From: Treasure Coast of Florida
The Iridium plug, 41-110 (with a .040 gap) was the originally installed plug when they started the NBS/Gen III LS. I think it was in 2003, but at some point early on, they changed the plug to the platinum and it became the superseded part number. The platinum plug 41-962 (has a .060 gap).