Stock.
GM Performance Parts L92 Spark Plug, 41-985
#12571164
AC Delco 41-985
This is a spark plug for the new 2007 Aluminum Block and Aluminum
Head L92 engine. It is not recommended changing the gap from
.040".
Spark Plugs
Stock.
GM Performance Parts L92 Spark Plug, 41-985
#12571164
AC Delco 41-985
This is a spark plug for the new 2007 Aluminum Block and Aluminum
Head L92 engine. It is not recommended changing the gap from
.040".
so same .708 reach tapered seat... but now they are factory iridium?
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That is correct. They are made by NGK too. It just says Delco.
2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G
Information on New Spark Plugs and Gapping #03-06-04-060 - (10/24/2003)
A new spark plug has been released for use in the above vehicles. The new spark plug has an Iridium tip instead of the current Platinum tip. Due to the different tip design, the gap of the spark plug has also changed. The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01mm (0.040 inches) when the spark plug is made. The spark plug gap is set during manufacturing and should not be changed or damage to the spark plug may result. Any new spark plug found to not be properly gapped should not be used.
[Word is they are re-badged NGK Iridiums]
Service Intervals I've checked for cars fitted with these say "change at 100k miles"........don't think I'd leave them that long personally.
They are NGK plugs just tagged AC-D. NGK is moving back to being the majority supplier to GM for plugs and possibly NTK for O2 sensors.
I fixed that! I am looking at the plug, reading NGK on nut and typing Nippon! IDIOT!!!
2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G
Info I have says first spark plug change on these at 100k miles.
Anybody got different info ?
Do these plugs, the AC Delcos, require a metric plug wrench? If so, what size please?
Thats correct, but I have found ck them at 50-60k and regap. When I did my headers I checked all plug gaps and not 1 was .040!
2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G
Thats typical GM stuff for Iridium plugs now... you can if you want toOriginally Posted by HSV-GTS-300
I wouldnt let any plug go that long but thats just me.
Nope standard (thank God!)
Charlie is having a Chris day
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