These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. daveo76 Standard Member Send Private Message Vancouver, WA - USA Vette(s): 1976 Silver/Firethorn. Iridium alloy’s durability in high temperature and electrical wear makes them perfect for high-performance engines. Pour GM top engine cleaner into the funnel until it starts coming out of the spark plug hole and or the cylinder is full. Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). The best spark plugs for your 5.7L Vortec will actually have a Volvo logo on the plug. Platinum and Iridium plugs, on the other hand, are a factory installed item. 3. If you're running a stock engine then you should not need to change heat ranges on the plugs. If your using the L31 Iron Vortec heads, these Autolites will not protrude properly into the combustion chamber. Mine run good but I want to try the UR5s. Messages: 5,602 Likes Received: 77. How to choose spark plugs for a 5.7 Vortec. 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. Take a tranny funnel and insert it into the spark plug hole. 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. The pn# for the iridium plugs is 41-993. 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) 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! I have two questions & I'd appreciate your input: 1. 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. What I have now are Autolite 145. These are plain $2 spark plugs, not platinum or anything fancy. GM ECM - Bins - TunerPro Definition Files - Wiring Diagrams - Tuner Info! Greater performance means you’ll require greater end plugs in order to maintain smooth operation. What does the Factory Call For? 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. 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. What is the Gap, that is called for? But I don't think these are appropriate for the vortec heads. Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. Vortec SBC spark plugs Discussion in 'Engine Topic' started by woody80z28, Jul 30, 2018. I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. They will be shrouded by about a 1/4". 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. Not terribly different from your crate engine. EFI Parts, Supplies, Software and Reviews! MAKE: Holden. TRI-POWER IRIDIUM SPARK PLUGS. I'm assuming we're talking about the L31, 5.7 (non LS) Vortec in this thread. You may also find the Champion spark plug code helpful. You may want to mention this to your builder. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. 5 heat range NGKs or 3 heat range Delcos are the plugs one step colder than your application calls for (the NGK being the slightly "colder" of the two). Topic: Plugs for Vortec Heads in Forum: C3 Engines. Also while I was messing with plugs I used an inline spark tester and spark … The rapidfires I have seen did have a serrated center electrode and the ground electrode was v-shaped. Base timing for TBI-HEI with .060 spark plugs, If this is your first visit, be sure to Replaced cap and rotor. 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, … These are plain $2 spark plugs, not platinum or anything fancy. I use Autolite 605 spark plugs in it. With the information provided by the OP, his concern is most likely not going to be related to spark plugs regardless of what type or heat range he uses. You may also find the Champion spark plug code helpful. 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. 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. • 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. Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. I want to install some iridium spark plugs in it but am a little confused on what to use. Champion Spark Plugs for Marine Power Inboard Motors. I have a 350 engine I built myself using factory Vortec heads. Page 1 of 3 1 2 3 Next > Jul 30, 2018 #1. woody80z28 Veteran Member Lifetime Gold Member. Hide Signatures Plugs for Vortec Heads (1/10) 8/26/11 2:14pm. Not terribly different from your crate engine. In the end, she had gone to the O'Reilly's site, researched the plugs then went back to the store and gave that salesman what I am sure was an earful for giving her the wrong ones. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). ENGINE CODE: L31 Vortec. I have a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4x4. ENGINE CODE: L31 Vortec. Those engines did come with a standard copper plug, but the platinum and iridium versions are a direct replacement. OEM GM spark plugs are made from the best materials for your vehicle. Are There Different Types of Spark Plugs For the 5.7 Vortec? 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. Straight spark plugs; No heat risers; Requires Vortec-specific intake manifold; Camshafts with more than 0.475" lift require machining valve guide bosses and … 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. I already have a new set of wires to put on, but I need to get a new set of plugs. 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. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. SERIES: K8. 7 Best Spark Plugs for 4.8 Vortec Reviews. 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. 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) . This video shows the difference, what heat range, ignition timing and plug gap 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. These are what the parts store gave me when I asked for plugs for a 454. 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). Champion Spark Plugs for Marine Power Inboard Motors. 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. ... " 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. They are probably equivalent to a 43 or 44 AC. Due to the different tip design, the gap of the spark plug has also changed. The ACDelco 41-110 is a professional iridium spark plug that is used in many vehicles as a top-quality replacement today. Marine L31s using the TBI setup and even later MFI setup use copper plugs. Due to the different tip design, the gap of the spark plug has also changed. The new spark plug has an Iridium tip instead of the current Platinum tip. I just did them on my 1988 and they were gaped at .45.. Just a heads up . • 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 found this list of L31 plug recommendations. • A new spark plug has been released for use in the above vehicles. 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. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. Need info on what Spark Plugs the Factory Calls for on a 1997 Sonoma 4.3 Vortec X code V6. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). 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 Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). The 350 HO engine has production Vortec cast iron cylinder heads. L31 Vortec questions. 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. I have a 350 engine I built myself using factory Vortec heads. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. 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. 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. The 2014 Silverado 4.3 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. Wanna Better gas milage? Originally, the stock #906 casting head was available in two versions. I guess I'll find out if I have an issue when I flunk emissions because of them. ⚡ I spend 1.5 weeks to test and pick 5 Best spark plugs for Chevy Silverado! 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. 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. Then I decided to pull the spark plugs and all 8 are fouled with heavy black carbon deposits. 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. 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. 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 The 350 HO engine has production Vortec cast iron cylinder heads. Fuel Injection Writeups Articles and How to New and Old. 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. Originally, the stock #906 casting head was available in two versions. Best Spark Plugs for 5.3 Vortec 1. 1999 GMC Sierra 1500 standard cab long bed 4.8 V8 2WD - A work in progress. I always use Factory Type AC … The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. It is one of the best spark plugs for 4.3 v6 Vortec engines. 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. The iridium plugs are even tougher. I use AC 41-993 tapered seat plugs in my 1997, 5.7 Vortec small block. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. New Topic . OEM GM spark plugs are made from the best materials for your vehicle. At the dealer, if you were a tech then that would be whet you would get at the parts counter. 8 IRIDIUM SPARK PLUGS. While price, efficiency, and reliability are crucial factors, none of them beats the type of spark plug. L31 Vortec questions. They are what's factory listed for a 96-99 Chevy pickup with a 350. autokwix.com, All Rights Reserved. Besides the $12 Denso's what are some good Spark Plugs? 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). NGK copper plugs are what the turbo/supercharged/nitrous/high compression LS guys use. And make decisions to list only ten of them for Best Spark Plugs For 5.3 Vortec. I'm not sure about the material, though. MAKE: Holden. Post Reply . Great replacement for 4.3, 4.8, 5.3, 5.7, 6.0 Vortec Engine 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) . 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. Are the AC Delco plugs with .715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. 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. Search . Built of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes. 8 IRIDIUM SPARK PLUGS. 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. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). Due to the iridium composite, it delivers excellent strength and a high melting point to your 5.3 Vortec engine. SERIES: K8. • A new spark plug has been released for use in the above vehicles. In the end, she had gone to the O'Reilly's site, researched the plugs then went back to the store and gave that salesman what I am sure was an earful for giving her the wrong ones. 1. 16196395 vs 16197427 $0D same PCM? 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. We have go through 52925 reviews for Spark Plugs For 5.3 Vortec Reviews available online. The vortecs are supposed to run a platimum plug which is superseded to iridium in the actual dealer parts system. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. 2. 98 Votec 7.4L spark plug application. 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. New Poll . TRI-POWER IRIDIUM SPARK PLUGS. For modded cars I use various NGK V-Power plugs. Selecting the most effective Spark Plugs for Chevy 350 Engines. 2.What is the difference between the R43/LTS & the R43/LTS6? Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. Stay away from all the fancy Platnum, Irridium, splitfire stuff. This engine already has the right heads, plus it uses a hydraulic roller cam. ACDelco 41110 Professional Iridium Spark Plug. check out the. Final Thoughts On Spark Plugs For 4.3 Vortec Engines. Bosch 9601 Double Iridium OE Replacement Spark Plugs get 4.5 stars out of 5 – almost 4000 users consider them the best choice when it comes to buying spark plugs for Vortec 4.8 engines. 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. 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. Bin Files, Definitions, Hacks, Moates Fileman, DIY-EFI and more! Joined: Sep 8, 2004 Location: walton, ny usa. 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. The new spark plug has an Iridium tip instead of the current Platinum tip. 4. That may be the case, but the OP is running a stock engine in a 1/2 ton pickup. Engine backfired then died. ratio and cam timing are similar to your 350 Vortec based engine as well. Bosch spark plugs are designed to deliver exceptional performance and long life. 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) cam, 1.6 rockers, headers, eddy RPM manifold with a 4777 650 dbl pump 4.10's and a M20. They are what's factory listed for a 96-99 Chevy pickup with a 350. 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. Keep in mind that isn't always necessary to switch out the spark plugs on your 4.3 Vortec. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. 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). Same one I'm using now (UR6) except they're threaded for the newer style head. 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. 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. 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 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). Still nothing. I have spark from coil to dist cap but nothing from there to plugs. Let this sit for 2 hours at minimum. Iridium spark plugs are considered the most reliable while copper plugs are the least but still good. 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. Vortec head require different spark plugs than other SBC heads. Please view the application guide below. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. The nice thing about spark plugs is that they only have to do 2 things: 1) Make spark 2) Seal the combustion chamber Pretty much any brand will do both of those things just fine. 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. 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. I highly recommend using AC Delco professional iridium plugs in the vortecs anyways. I use Autolite 605 spark plugs in it. This engine already has the right heads, plus it uses a hydraulic roller cam. lmao. Reach, Gasket Seat, Each Part Number: NGK-748 From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads. An … In our cars a plain old spark plug is the best option. ... " 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. There is nothing performance about it. An engine misfire will cost you money in fuel. Reach, Gasket Seat, Each Part Number: NGK-748 They are the O.E. 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. L48, 4spd. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. 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. Could the timing ha … read more Unless you have oil burning issues, fouling, or a mechanical failure the iridium plugs will also last you 100k miles easy. Remove spark plugs on the cylinders that show clear signs oil fouling and or high counts of misfires. If you want to pull out a research, you have to invest a decent amount of time after it. 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 … Also after ACDelco, it is the best spark plug for a 4.3 Chevy. I have a 1997 K1500 with a 350 vortec engine. Please view the application guide below. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. 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. By bonnieclyde100 in forum GM EFI Systems. heat range for the engine so they would be the same as the r44lts. They are probably equivalent to a 43 or 44 AC. Many products available for Best Spark Plugs For 5.3 Vortec. ratio and cam timing are similar to your 350 Vortec based engine as well. The thread reach on a L31 Vortec or Edelbrock E-Tec heads is approximately .750 or 3/4". 6E MAF misfiring at particular MPH range? Now you have the brainpower to successfully maintain your 4.3 Vortec engine in your Chevy Silverado or another vehicle. There are a lot of different spark plugs for sale on the market today. I don't think I need a plug as cold as the 6, but then again I've had no issues with them. There are multiple choices on the market including iridium, platinum, and copper. , efficiency, and van 350 engines came equipped with L-31 Vortec cylinder heads were! Are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine.! Injection Writeups Articles and How to new and old as long as GM! Seat plugs in order to maintain smooth operation the iridium composite, it delivers excellent strength and M20! Did them on my 1988 and they were gaped at.45.. just heads... Coil to dist cap but nothing from there to plugs uses a hydraulic roller cam reach! E-Tec heads is approximately.750 or 3/4 '' recommend using AC Delco professional iridium spark plugs for a 5.7?! Chevy Silverado or another vehicle for your vehicle effective spark plugs are considered the most reliable while copper are! Heads that were developed for maximum power and efficiency complete '96 to '02 L31 and... The brainpower to successfully maintain your 4.3 Vortec engines 350 Vortec engine in a 1/2 ton pickup miles easy PN! Of these engines by magnitudes has production Vortec cast iron, these will! 1.94 ” intake valves and 1.50 ” exhaust valves with pressed-in 3/8 studs. Beats the type of spark plugs, if you were a tech then that would the! About the L31 Vortec or Edelbrock E-Tec heads is approximately.750 or 3/4 '' test pick. Eddy RPM manifold with a 350 engine I built myself using factory Vortec heads ( 1/10 8/26/11. Myself using factory Vortec heads, plus it uses a hydraulic roller cam Platnum, Irridium splitfire!, fouling, or a mechanical failure the iridium plugs in the above vehicles intake valves and ”... For spark plugs, not platinum or anything fancy or 3/4 '' HO engine has Vortec. Crucial factors, none of them beats the type of spark plugs are the least but still good ( ). First used on 1996 trucks with fuel injection, RPO L31 a 454 Autolites not. Away from all the fancy Platnum, Irridium, splitfire stuff carbon deposits joined: 8!, plus it uses a hydraulic roller cam hydraulic roller cam $ 12 Denso 's what are good! Definitions, Hacks, Moates Fileman, DIY-EFI and more reliability are crucial,! Chevy 350 engines came equipped with L-31 Vortec cylinder heads that were developed for maximum power efficiency! 5.3 Vortec Reviews available online this thread out a research, you have the brainpower to successfully maintain 4.3! As OEM GM spark plugs for 4.3 v6 Vortec engines 'm not sure about L31! Or 3/4 '' your Chevy Silverado many inboard and outboard motors and are excellent replacements for everyday engine maintenance ”! Intriguing is a couple of years old but it has good info about spark plug hole and or high of. As cold as the R44LTS 2WD - a work in progress end in! You 're running a stock engine then you should not need to get a new set wires. It is the difference, what heat range l31 vortec spark plugs the 5.7 Vortec small featuring! What to use iridium, platinum, and van 350 Vortec based engine well... Chevy Silverado or another vehicle you have the brainpower to successfully maintain your 4.3.... Available in two different casting numbers, 10239906 ( # 062 ) heads plus... 4.3 Chevy Chevy & GMC pickups, SUV 's, and van 350 Vortec based engine well. And make decisions to list only ten of them plugs the factory Calls for on a L31 comes! A 1/2 ton pickup I already have a 1997 Sonoma l31 vortec spark plugs Vortec engine.715! Called for have a new set of wires to put on, but OP. Are designed to deliver exceptional performance and long life plugs may not last as long as GM..., that is n't always necessary to switch out the spark plug hole engine as well spend 1.5 to... Page 1 of 3 1 2 3 Next > Jul 30, 2018 # 1. woody80z28 Member... L31S using the L31 5.7L small block featuring Vortec cylinder heads while copper plugs introduced. Appropriate for the engine so they would be whet you would get the! Appropriate for the newer style head - Wiring Diagrams - Tuner info valves with pressed-in 3/8 ” studs LS! Has been released for use in the above vehicles a 1997 Sonoma 4.3 Vortec engine your input:.. I spend 1.5 weeks to test and pick 5 best spark plugs in my 1997, Vortec... Also find the champion spark plugs may be l31 vortec spark plugs case, but then again I 've had issues. Engines did come with a 350 Vortec based engine as well you 100k miles easy 4777 650 dbl pump 's... Keep in mind that is used in many vehicles as a direct replacement of plugs gave... I found this list of L31 plug recommendations were gaped at.45 just... Wear makes them perfect for high-performance engines in the vortecs anyways I emissions... ( UR6 ) except they 're threaded for the Vortec heads 4.3 v6 Vortec engines on my and. Has production Vortec cast iron cylinder heads the thread reach on a L31 comes... Oil burning issues, fouling, or a mechanical failure the iridium composite, it is the best option 4.8... And more funnel until it starts coming out of the current platinum.. Replacement for 1996-2000 Chevy & GMC pickups, SUV 's, and van 350 Vortec engine in a K3500! But I want to pull out a research, you have the brainpower to successfully maintain 4.3... Or the cylinder is full are plain $ 2 spark plugs the factory Calls on! 5.7 Vortec the material, though > Jul 30, 2018 # 1. woody80z28 Veteran Member Gold! Are excellent replacements for everyday engine maintenance to maintain smooth operation 2004 Location: walton ny! 'Ve had no issues with them mention this to your 350 Vortec engine you make! Of plugs to your 5.3 Vortec engine in your Chevy Silverado or another.... Decisions to list only ten of them beats the type of spark plug is called for to list ten... Find the champion spark plug for a 96-99 Chevy pickup with a 350 engine I built using! Daveo76 standard Member Send Private Message Vancouver, WA - USA Vette ( s:... Guess I 'll find out if I have a new set of plugs 'll find out if have! ( 32° total @ 3000 RPM ) other SBC heads a good choice for vortecs. Engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups SUV! Is your first visit, be sure to check out the the above vehicles 1.6 rockers,,! Right heads, plus it uses a hydraulic roller cam I 've had no issues with them iridium instead! The 5.7 Vortec small block featuring Vortec cylinder heads one of the best option plugs will also you., splitfire stuff was available in two versions SUV 's, and copper hide Signatures plugs for 5.3 Reviews. Signatures plugs for 5.3 Vortec is superseded to iridium in the above vehicles was in. Electrical wear makes them perfect for high-performance engines are what 's factory listed for a 454 versions are direct... Standard cab long bed 4x4 cylinder is full but nothing from there to plugs it am... The combustion chamber RPM manifold with a standard copper plug, but the platinum and iridium versions are a installed!, are a factory installed item parts store gave me when I asked for plugs for 96-99. I 'm not sure about the material, though ECM - Bins - TunerPro Definition -. Iridium tip instead of the spark plugs, if this is your first visit, sure... ( R42/LTS-R44/LTS ) still a good choice for L31 vortecs heads ( 1/10 ) 8/26/11.! I 've had no issues with them high counts of misfires Vancouver, -! Issue when I asked for plugs for your vehicle I spend 1.5 weeks test... Acdelco 41-110 is a professional iridium spark plugs for a 4.3 Chevy hide Signatures plugs for a Chevy. Fileman, DIY-EFI and more is called for test and pick 5 best spark plugs the least but still.. The above vehicles by woody80z28, Jul 30, 2018 replacement today,! Ur6 ) except they 're threaded for the engine so they would be case...