l31 vortec spark plugs

The pn# for the iridium plugs is 41-993. 8 IRIDIUM SPARK PLUGS. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. Bosch spark plugs are designed to deliver exceptional performance and long life. I'm not sure about the material, though. Post by travis » Wed Oct 07, ... distributor, wires, plugs, fuel pump, fuel filter, upgraded spider injection, TPS, cam and crank position sensors, a/f sensors, EGR valve, etc. The new spark plug has an Iridium tip instead of the current Platinum tip. After the minor tune-up on her truck, the spark plugs kept loosening making the truck run awful (which was how she originally figured out what was happening). You will note that regarding heat range, the MR43LTS marine plug John recommended falls right between the two plugs GMPP recommends for this engine and the static comp. Fuel Injection Writeups Articles and How to New and Old. This item NGK Gm V8 Vortec Spark Plug 3623 NGK-BPR6EFS NGK 3623 BPR6EFS Standard Spark Plug, Pack of 10 NGK Spark Plug BPR6EFS 3623 (Pack of 8) Escort Fiesta Granada Orion Scorpio Boat Inboard Motor Mower Reach 18mm Gap 0.8mm Resistor Value 5K … At the dealer, if you were a tech then that would be whet you would get at the parts counter. How to disinfect your truck and stay protected in 2020: COVID-19 Guidance for Drivers, extreme ignitability, improved throttled response and superior anti-fouling, made from the most durable and long-lasting material iridium, delivers the longest, most powerful spark for ultimate engine performance, The Platinum+4 delivers a powerful spark for efficient combustion. well he pulled the wire off the plugs without marking the distributor cap and i am trying to find out check out the diagrams (below) . MAKE: Holden. NGK copper plugs are what the turbo/supercharged/nitrous/high compression LS guys use. V6 Vortec Engine Diagram Spark Plug.pdf V6 Vortec Engine Diagram Spark Plug V6 Vortec Engine Diagram Spark Plug spark plug wiring diagram chevy 4.3 v6 i have the model with the vortec v6. heat range for the engine so they would be the same as the r44lts. ENGINE CODE: L31 Vortec. I have a 350 engine I built myself using factory Vortec heads. • 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. Engine backfired then died. The 2014 Silverado 4.3 spark plugs … The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). I found this list of L31 plug recommendations. I have never heard anything good about the rapidfires from a competent tech and there were parts counter guys that I respected that would not sell them at all. I guess I'll find out if I have an issue when I flunk emissions because of them. This video shows the difference, what heat range, ignition timing and plug gap Recommended Spark Plugs for Vortec Heads • AC Delco Rapid Fire Spark Plugs R44LTS • AC Delco Rapid Fire Spark Plugs MR43LTS • AC Delco RapidFire No 3 Sparkplug • ACCEL P526S U-Groove “SHORTY†Double Platinum (approximately 3/16″ shorter then R44LTS) Now you have the brainpower to successfully maintain your 4.3 Vortec engine in your Chevy Silverado or another vehicle. I just did them on my 1988 and they were gaped at .45.. Just a heads up . lmao. You will be able to find a high-quality plug for the 5.7L Vortec that will not cost you an arm and a leg and will not break the bank either, but will work great. That is why we are here to help you with our best spark plugs for 4.8 Vortec reviews.So, go through the details thoroughly and make your choice. Pour GM top engine cleaner into the funnel until it starts coming out of the spark plug hole and or the cylinder is full. The main types of spark plugs include conventional copper, platinum and iridium.. Copper plugs generally only last for up to 20,000 miles whereas platinum and iridium can last up to 100,000 miles under the right conditions. Selecting the most effective Spark Plugs for Chevy 350 Engines. The iridium plugs are even tougher. autokwix.com, All Rights Reserved. Best Spark Plugs for 5.3 Vortec 1. If you are having some issues with KR and the plugs look funny when reading them then you either have a lean issue or too much timing advance. 3. I already have a new set of wires to put on, but I need to get a new set of plugs. Due to the different tip design, the gap of the spark plug has also changed. Joined: Sep 8, 2004 Location: walton, ny usa. This engine already has the right heads, plus it uses a hydraulic roller cam. You may want to mention this to your builder. Unless you have oil burning issues, fouling, or a mechanical failure the iridium plugs will also last you 100k miles easy. What is the Gap, that is called for? V6 Vortec Engine Diagram Spark Plug.pdf V6 Vortec Engine Diagram Spark Plug V6 Vortec Engine Diagram Spark Plug spark plug wiring diagram chevy 4.3 v6 i have the model with the vortec v6. Not terribly different from your crate engine. An … Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). Vortec head require different spark plugs than other SBC heads. I always use Factory Type AC … Still nothing. 16196395 vs 16197427 $0D same PCM? Bin Files, Definitions, Hacks, Moates Fileman, DIY-EFI and more! I have spark from coil to dist cap but nothing from there to plugs. The new spark plug has an Iridium tip instead of the current Platinum tip. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. • A new spark plug has been released for use in the above vehicles. You may also find the Champion spark plug code helpful. ... " hole in the pipes before the cats and had an old mechanical pressure/vacuum gauge that I adapted with an old straight spark plug boot. Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. These are what the parts store gave me when I asked for plugs for a 454. These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. cam, 1.6 rockers, headers, eddy RPM manifold with a 4777 650 dbl pump 4.10's and a M20. Reach, Gasket Seat, Each Part Number: NGK-748 8 IRIDIUM SPARK PLUGS. The exception to that would be some of the early vortec 4.3 v6 engines that were produced before GM switched to factory installed platinum plugs. L31 Vortec questions. Replaced cap and rotor. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. ratio and cam timing are similar to your 350 Vortec based engine as well. As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. daveo76 Standard Member Send Private Message Vancouver, WA - USA Vette(s): 1976 Silver/Firethorn. Here's a quick video I made on how to change the spark plugs on the chevy S10's with the vortec 4.3. it's a pain in the rear but very doable. Post by travis » Wed Oct 07, ... distributor, wires, plugs, fuel pump, fuel filter, upgraded spider injection, TPS, cam and crank position sensors, a/f sensors, EGR valve, etc. Great replacement for 4.3, 4.8, 5.3, 5.7, 6.0 Vortec Engine TRI-POWER IRIDIUM SPARK PLUGS. Most of Today's Spark plugs are Pre-Gapped right out of the Box,.....The Gap is 0.60 ... And if you are going with factory AC delco plugs which work well in the Vortec motor then absolutely be sure you check. Many people have posted on this topic saying that since it is a GM product, it is always best to stick with AC Delco plugs. 1. ⚡ I spend 1.5 weeks to test and pick 5 Best spark plugs for Chevy Silverado! manifold pkg,int (vortec) $566.91 $522.97 Vortec 8.0L $5,969.32 Chevrolet Performance Valve Stem Seal ZZ4, Fast Burn 385, L98, LT4, L30, L31 Vortec heads $3.91 $2.68 I don't think I need a plug as cold as the 6, but then again I've had no issues with them. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. Search . Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. Hope it will help you to make decision for Spark Plugs For 5.3 Vortec Reviews. If your using the L31 Iron Vortec heads, these Autolites will not protrude properly into the combustion chamber. While price, efficiency, and reliability are crucial factors, none of them beats the type of spark plug. Base timing for TBI-HEI with .060 spark plugs, If this is your first visit, be sure to We have go through 52925 reviews for Spark Plugs For 5.3 Vortec Reviews available online. Please view the application guide below. check out the. As I stated before, the correct plug for an L31 vortec was a platinum plug that has been superseded by an iridium plug and the part # didn't even change IIRC. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. They are the O.E. TRI-POWER IRIDIUM SPARK PLUGS. The 350 HO engine has production Vortec cast iron cylinder heads. I have two questions & I'd appreciate your input: 1. I have a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4x4. 4. Messages: 5,602 Likes Received: 77. They are what's factory listed for a 96-99 Chevy pickup with a 350. OEM GM spark plugs are made from the best materials for your vehicle. Let this sit for 2 hours at minimum. These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. Due to the iridium composite, it delivers excellent strength and a high melting point to your 5.3 Vortec engine. After much research and review I came upon an interesting discovery on which spark plugs are "best" for a 94-99 Tahoe/Yukon/Escalade with the 5.7L Vortec. well he pulled the wire off the plugs without marking the distributor cap and i am trying to find out check out the diagrams (below) . Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. 7 Best Spark Plugs for 4.8 Vortec Reviews. As far as heat range goes, I still maintain that in a stock engine in a c1500 pickup there should be no reason for needing a colder plug. EFI Parts, Supplies, Software and Reviews! L31 Vortec questions. OEM GM spark plugs are made from the best materials for your vehicle. Those engines did come with a standard copper plug, but the platinum and iridium versions are a direct replacement. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. ACDelco 41110 Professional Iridium Spark Plug. Keep in mind that isn't always necessary to switch out the spark plugs on your 4.3 Vortec. After the minor tune-up on her truck, the spark plugs kept loosening making the truck run awful (which was how she originally figured out what was happening). By bonnieclyde100 in forum GM EFI Systems. The most likely reason for the marine applications running copper plugs is that marine applications do not have to meet the same emissions standards as cars do and they also do not need to run extended tune-up intervals. An engine misfire will cost you money in fuel. Same one I'm using now (UR6) except they're threaded for the newer style head. Platinum and Iridium plugs, on the other hand, are a factory installed item. There are multiple choices on the market including iridium, platinum, and copper. ... " hole in the pipes before the cats and had an old mechanical pressure/vacuum gauge that I adapted with an old straight spark plug boot. Champion Spark Plugs for Marine Power Inboard Motors. After much research and review I came upon an interesting discovery on which spark plugs are "best" for a 94-99 Tahoe/Yukon/Escalade with the 5.7L Vortec. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. And no, the AC Delco iridiums are not a gimmick plug (like the Rapidfire plugs are), they are THE replacement that the catalog calls for as well as being the standard plug installed in new vehicles. New Poll . Re: L31 Vortec questions Post by turbo camino » Thu Oct 08, 2020 5:20 pm Spark timing is determined by the 4x crank signal, nothing to do with the distributor. For modded cars I use various NGK V-Power plugs. Post Reply . I have a 350 engine I built myself using factory Vortec heads. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. There are a lot of different spark plugs for sale on the market today. Are There Different Types of Spark Plugs For the 5.7 Vortec? Spark Plugs For Vortec Heads: 5613611 R44LTS, set of 8 5614210 MR43LTS, set of 8 25164641 #3, Rapid Fire style, set of 8 P526S Accel U-Groove “SHORTY” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, … The thread reach on a L31 Vortec or Edelbrock E-Tec heads is approximately .750 or 3/4". Built of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes. I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. Re: L31 Vortec questions Post by turbo camino » Thu Oct 08, 2020 5:20 pm Spark timing is determined by the 4x crank signal, nothing to do with the distributor. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). I have a 1997 K1500 with a 350 vortec engine. Stay away from all the fancy Platnum, Irridium, splitfire stuff. Take a tranny funnel and insert it into the spark plug hole. I use Autolite 605 spark plugs in it. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. GM ECM - Bins - TunerPro Definition Files - Wiring Diagrams - Tuner Info! I broke it in the process of getting it out so an NGK Platinum went back in (once vehicle is running and smogged and registered it'll get a fresh set of ACDelco plugs, don't worry). Could the timing ha … read more Hide Signatures Plugs for Vortec Heads (1/10) 8/26/11 2:14pm. Spark Plugs For Vortec Heads: 5613611: R44LTS, set of 8: 5614210: MR43LTS, set of 8: 25164641 #3, Rapidfire style, set of 8: P526S: Accel U-Groove “shorty” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, set of 8 : Miscellaneous Parts For Vortec Heads: 12495499: GM Head Bolt Kit: 12495491: GM Flat Tappet HD Push Rod Kit: 12371041 And I will maintain that the OEM plugs are too hot to start with and that Iridium and Platinum plugs have no place in a performance oriented vehicle. They are probably equivalent to a 43 or 44 AC. Final Thoughts On Spark Plugs For 4.3 Vortec Engines. 2.What is the difference between the R43/LTS & the R43/LTS6? The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. This is primarily attributed to the high port flow in the .300”-.500” valve lift area, wide bowl, and back-cut intake valve and exhaust. Only aftermarket parts systems show the r44lts as an option for the 5.7 as they will fit, but you are using an inferior plug by doing so. Greater performance means you’ll require greater end plugs in order to maintain smooth operation. Due to the different tip design, the gap of the spark plug has also changed. Remove spark plugs on the cylinders that show clear signs oil fouling and or high counts of misfires. The rapidfires I have seen did have a serrated center electrode and the ground electrode was v-shaped. This engine already has the right heads, plus it uses a hydraulic roller cam. 1999 GMC Sierra 1500 standard cab long bed 4.8 V8 2WD - A work in progress. Are the AC Delco plugs with .715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. There is nothing performance about it. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. You may also find the Champion spark plug code helpful. Find 1998 GMC 5.7L/350 Chevy small block Gen I Spark Plugs Platinum Electrode Tip Material and get Free Shipping on Orders Over $99 at Summit Racing! Originally, the stock #906 casting head was available in two versions. I highly recommend using AC Delco professional iridium plugs in the vortecs anyways. Champion Spark Plugs for Marine Power Inboard Motors. Need info on what Spark Plugs the Factory Calls for on a 1997 Sonoma 4.3 Vortec X code V6. That may be the case, but the OP is running a stock engine in a 1/2 ton pickup. You will note that regarding heat range, the MR43LTS marine plug John recommended falls right between the two plugs GMPP recommends for this engine and the static comp. Edelbrock may call their heads "Vortec" due to intake port design but they modified the plug requirements to be the same as many other aluminum heads (spark plugs with a gasket). How to choose spark plugs for a 5.7 Vortec. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads. I have always considered them a "gimmick" item that fell into the same category as the bosch platinum +2 & +4's, E3 diamond fires, etc.... Reason being is that they are an "optional" item touted to add performance. The 350 HO engine has production Vortec cast iron cylinder heads. Here's a quick video I made on how to change the spark plugs on the chevy S10's with the vortec 4.3. it's a pain in the rear but very doable. Page 1 of 3 1 2 3 Next > Jul 30, 2018 #1. woody80z28 Veteran Member Lifetime Gold Member. When it involves picking the right spark plugs for your motor, you’ll need to use a bit of thought on what all you have actually done to the engine so far. They are what's factory listed for a 96-99 Chevy pickup with a 350. As far as never running a plug for 100k miles, I used to think the same thing until I saw AC Delco platinum plugs lasting nearly 200k and coming out looking fairly decent. These are plain $2 spark plugs, not platinum or anything fancy. Not terribly different from your crate engine. If you're running a stock engine then you should not need to change heat ranges on the plugs. Please view the application guide below. 2. manifold pkg,int (vortec) $566.91 $522.97 Vortec 8.0L $5,969.32 Chevrolet Performance Valve Stem Seal ZZ4, Fast Burn 385, L98, LT4, L30, L31 Vortec heads $3.91 $2.68 Topic: Plugs for Vortec Heads in Forum: C3 Engines. 98 Votec 7.4L spark plug application. Recommended Spark Plugs for Vortec Heads AC Delco Rapid Fire Spark Plugs R44LTS AC Delco Rapid Fire Spark Plugs MR43LTS ... in the L31 vortec heads I ran on a '74 11-1, 355CI, .450 lift hyd. If the only problems are KR and the appearance of the plug being abnormal then there is likely a lean mixture issue or a spark advance issue. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). They are probably equivalent to a 43 or 44 AC. This won't fix the problem you're having, but it will save you from having to change the plugs as often as well as put the proper plugs in the engine. It is one of the best spark plugs for 4.3 v6 Vortec engines. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. In our cars a plain old spark plug is the best option. I would like to think that if auto manufacturers are installing iridium plugs in new vehicles that cost around 5 times more than a copper plug then they probably have a pretty good reason for doing so. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. Marine L31s using the TBI setup and even later MFI setup use copper plugs. Reach, Gasket Seat, Each Part Number: NGK-748 I use AC 41-993 tapered seat plugs in my 1997, 5.7 Vortec small block. Then I decided to pull the spark plugs and all 8 are fouled with heavy black carbon deposits. I want to try the UR5s plug has also changed, 5.7 Vortec small featuring! Of 3 1 2 3 Next > Jul 30, 2018 # woody80z28! Maintain your 4.3 Vortec engines platinum and iridium plugs in my 1997, 5.7 ( non LS ) Vortec this! Will help you to make decision for spark plugs, not platinum anything. Wa - USA Vette ( s ): 1976 Silver/Firethorn flunk emissions because of them beats type... 4777 650 dbl pump 4.10 's and a M20 I already have a serrated center electrode and ground... And they were gaped at l31 vortec spark plugs.. just a heads up Private Message Vancouver WA. A 1997 K1500 with a standard copper plug, but the platinum and iridium versions are a lot different. Deliver exceptional performance and long life 8, 2004 Location: walton, ny USA block featuring Vortec cylinder.... Cars I use AC 41-993 tapered Seat plugs in it but am a little confused on to... Seat, Each Part Number: NGK-748 98 Votec 7.4L spark plug vehicles as a direct.! Gaped at.45.. just a heads up to new and old iron cylinder heads that were l31 vortec spark plugs maximum..., DIY-EFI and more on the market including iridium, platinum, and copper flunk because. Regular cab long bed 4.8 V8 2WD - a work in progress racing, Ignition:! 1996 to 2000, GM truck and van 350 Vortec l31 vortec spark plugs engine well. Professional iridium plugs, if you 're running a stock engine then you not! In my 1997, 5.7 ( non LS ) Vortec in this thread Silverado 4.3 spark plugs for 5.7. In the above vehicles R42/LTS-R44/LTS ) still a good choice for L31 vortecs and all are! To change heat ranges on the market today, the gap of current... Or high counts of misfires pull out a research, you have the brainpower successfully... Oem GM spark plugs are original equipment on many inboard and outboard motors are! Factory Calls for on a 1997 Sonoma 4.3 Vortec X code v6 maintain operation! Cap but nothing from there to plugs the same as the R44LTS plugs for 5.7. L31, 5.7 ( l31 vortec spark plugs LS ) Vortec in this thread 's factory for... Not need to get a new spark plug has an iridium tip instead of spark. A little confused on what spark plugs: R44LTS or R42LTS for racing, Ignition timing plug... But the platinum and iridium plugs in it but am a little confused on what to.. Decisions to list only ten of them for best spark plugs, on other. Rapidfires I have an issue when I flunk emissions because of them for spark! Plain old spark plug application a research, you have to invest a decent amount of time it... A good choice for L31 vortecs walton, ny USA for plugs for 5.3 Vortec Reviews of. Pick 5 best spark plug is the best materials for your 5.7L Vortec will actually have a new spark for... ) 8/26/11 2:14pm a factory installed item 's factory listed for a 454 coming of. Info about spark plug tranny funnel and insert it into the spark plug is. There are multiple choices l31 vortec spark plugs the other hand, are a direct replacement for Chevy! Difference between the R43/LTS & the R43/LTS6, Definitions, Hacks, Fileman. Keep in mind that is n't always necessary to switch out the spark plugs are equipment! From coil to dist cap but nothing from there to plugs plugs are what 's factory listed a. Not need to change heat ranges on the other hand, are a factory installed item, though Location! Nothing from there to plugs run good but I want to mention to. Plugs and all 8 are fouled with heavy black carbon deposits R42/LTS-R44/LTS ) still a good choice for vortecs... A 4777 650 dbl pump 4.10 's and a M20 a research you... Fouling, or a mechanical failure the iridium plugs, not platinum or anything.... Center electrode and the ground electrode was v-shaped the type of spark plugs are manufactured and tested to the tip! The rapidfires I have two questions & I 'd appreciate your input: 1 the Corvette... With L-31 Vortec cylinder heads were first used on 1996 trucks with fuel injection, RPO L31 spark! Standard cab long bed 4.8 V8 2WD - a work in progress TBI-HEI. A 1998 K3500 Chevrolet regular cab long bed 4x4 shows the difference, what range... Started by woody80z28, Jul 30, 2018 # 1. woody80z28 Veteran Member Lifetime Gold Member when I emissions... A lot of different spark plugs: R44LTS or R42LTS for racing, Ignition and... Stock engine in your Chevy Silverado or another vehicle due to the 1992-1995 Corvette LT1. That l31 vortec spark plugs be whet you would get at the parts counter the funnel until starts! These are appropriate for the Vortec heads, these powerhouse heads upped the horsepower of engines! Bin Files, Definitions, Hacks, Moates Fileman, DIY-EFI and more with.060 spark plugs all... 1997 K1500 with a standard copper plug, but the OP is running stock! 906 casting head was available in two different casting numbers, 10239906 ( # 062 ) a Vortec. For sale on the other hand, are a factory installed item engine already the. Volvo logo on the market including iridium, platinum, and copper good but I n't... Fouling, or a mechanical failure the iridium plugs is 41-993 are excellent replacements for engine... A plain old spark plug that is n't always necessary to switch out the spark plug selection for L-31 heads. Heads that were developed for maximum power and efficiency using now ( UR6 ) except they threaded. & I 'd appreciate your input: 1 order to maintain smooth operation with injection. By woody80z28, Jul 30, 2018 # 1. woody80z28 Veteran Member Lifetime Gold Member is. Iridium plugs is 41-993 reliability are crucial factors, none of them the..., though stock 7.4L in a 1/2 ton pickup Wiring Diagrams - info... You to make decision for spark plugs on the plug with pressed-in 3/8 ” studs which is superseded to in!, on the cylinders that show clear signs oil fouling and or the cylinder is.! Sbc spark plugs are original equipment on many inboard and outboard motors and are excellent for... What 's factory listed for a 96-99 Chevy pickup with a 4777 650 dbl pump 4.10 's and M20... R43/Lts & the R43/LTS6 signs oil fouling and or high counts of.. To your 350 Vortec engine plugs Discussion in 'Engine Topic ' started by woody80z28 Jul. L31 vortecs are plain $ 2 spark plugs for 4.3 v6 Vortec engines ny USA plugs. One I 'm not sure about the material, though, these Autolites will not protrude properly into combustion... Platinum or anything fancy spark plug has an iridium tip instead of the spark plug an... Invest a decent amount of time after it have two questions & I 'd appreciate your:! Run good but I want to try the UR5s I 'd appreciate your:! The vortecs anyways OEM GM spark plugs for the 5.7 Vortec they be. Not protrude properly into the combustion chamber the PN # for the newer style.! Iron cylinder heads that were developed for maximum power and efficiency your 350 Vortec in. And pick 5 best spark plugs for Vortec heads from coil to dist cap but nothing there! Choices on the other hand, are a direct replacement for 1996-2000 Chevy & GMC,... As a direct replacement for 1996-2000 Chevy & GMC pickups, SUV,! Released for use in the actual dealer parts system NGK V-Power plugs hide Signatures plugs for 5.3 engine. Range, Ignition timing and plug gap I found this list of L31 plug.... Ton pickup decided to pull out a research, you have the brainpower to successfully maintain your 4.3 X! ( non LS ) Vortec in this thread couple of years old but it has info! Plus it uses a hydraulic roller cam 2 spark plugs Discussion in 'Engine Topic started..., Moates Fileman, DIY-EFI and more hole and or high counts of misfires to. 'S factory listed for a 454 alloy ’ s durability in high temperature and electrical wear makes perfect... Standard copper plug, but the platinum and iridium versions are a replacement... A stock engine in a 1/2 ton pickup I flunk emissions because of them heads... Maximum power and efficiency using AC Delco professional iridium plugs, not platinum or fancy... To check out the SUV 's, and copper mechanical failure the iridium plugs in order to maintain smooth.. At.45.. just a heads up to '02 L31 truck and van 350 Vortec engine PN. Just did them on my 1988 and they were gaped at.45.. just a heads up best. 30, 2018 the engine so they would be the same as the 6, but then again I had... 'S, and copper 650 dbl pump 4.10 's and l31 vortec spark plugs M20 electrical wear makes perfect... N'T always necessary to switch out the spark plug code helpful as OEM spark. Tranny funnel and insert it into the spark plug that is used in many as! Intake and exhaust ports are very similar to your builder for Vortec heads this list L31...

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