Then repeat these two steps for the other spark plugs. Be aware the 41-103 Iridium spark plug is the recommended spark plug for your vehicle. !, that's $6.75ea, bargain. $49.78. They aren't your Grandpa's $0.99 Chevy 350 copper plugs. • The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01 mm (0.040 in) when the spark plug is made. Due to the different tip design, the gap of the spark plug has also changed. Best Spark Plugs for LS1 Engines Image Score Link; ACDelco 41-993 Professional Iridium Spark Plug: 4.8: ACDelco 41-962 Professional Platinum Spark Plug: 4.5: Denso PT16TT Platinum TT Spark Plug: 4.6: Bosch 6704 Platinum Spark Plug: 4.1: NGK TR5GP G-Power Spark Plug: 3.7 Figure 3. Stock sparkplug with a 0.50 gap will get blown out under boost and is too hot of a plug NGK TR6 is one step colder and gap of 0.35 Maybe even need 2 steps colder but I'd try the TR6 first. We appreciate your e-mail regarding the spark plug for your 2002 Chevrolet TrailBlazer. The tip can easily be damaged with a gap tool. The new spark plug has an Iridium tip instead of the current Platinum tip. I didn't re-gap the plugs when I bought them I just … And check the gap and tip alignment of the new plugs. ACDelco Regular Spark Plugs are precisely engineered and manufactured to provide everyday reliability and efficient performance giving up to 100,000 kms# of service in some applications. 1 Quote; Share this post. Name: Ac delco spark plug gap chart. AC Delco gap should be 0.060 inch. The spark plug gap for the Cruze 1.8L engine is the same: 0.6 - 0.7 mm. Use the 41-962s and you'll be fine. Due to the different tip design, the gap of the spark plug has also changed. Binder ID: 2133472. Visit our site for coupons and promotions. Shop for ACDelco Spark Plug Part #: FR5LS for your vehicle. It was later changed to .040" for all LS engines. Never attempt to gap an ACDelco Professional Iridium Spark Plug. A new spark plug has been released for use in the above vehicles. Found a similar change in the AC Delco plug listings. Jump to Latest Follow ... LS1GTO.com is a forum community dedicated to the LS1 Pontiac GTO. Thank you for writing ACDelco, John. The new spark plug has an Iridium tip instead of the current Platinum tip. The 2012 and 2013 North American Cruze Owner’s Manual spark plug gap will remain unchanged at 0.7 mm as they are already printed. Enter a complete 17 digit VIN code above then press Enter or click Continue. Stock, AC Delco plugs are the only way to go in these engines in my opinion. Before you go out to buy a new spark plug, you need to check out some of the symptoms that tell you that the existing one needs replacement. ACDelco Professional platinum spark plugs are perfect for engines that run on conventional plugs, and newer engines that require platinum plugs. Link to post Share on other sites. Check the gap before installing any plug. my stock ls3 iridiuns were gaped to .9mm You never know if they were damaged in shipping before the part store got them, or if some idiot employee at the store attempted to juggle them while … Spark Plug Wire Retainer / Clip. AC Delco gap should be 0.060 inch. • The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1.01 mm (0.040 in) when the spark plug is made. I always used the stock AC delco CR43TS for a 350 or the CR45TS for a 305. Check the gap on your spark plug. Characteristics of ACDelco 41-110 Iridium Spark Plug for 5.3L Engine are: As this is the original equipment, it will fit, function, and last for long. Choose your spark plug and buy online or in any retail store. '' for all LS engines point O-Six was the original was 41-985 and it 's current is... Also has a foot ls1 spark plug gap acdelco about not re gaping the plugs that run on conventional plugs and... 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