l31 vortec spark plugs

Unless you have oil burning issues, fouling, or a mechanical failure the iridium plugs will also last you 100k miles easy. 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. 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. This engine already has the right heads, plus it uses a hydraulic roller cam. Keep in mind that isn't always necessary to switch out the spark plugs on your 4.3 Vortec. Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). The ACDelco 41-110 is a professional iridium spark plug that is used in many vehicles as a top-quality replacement today. An … 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. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. Still nothing. check out the. Please view the application guide below. 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 lmao. Originally, the stock #906 casting head was available in two versions. • 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. These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. You may also find the Champion spark plug code helpful. Also while I was messing with plugs I used an inline spark tester and spark … Hope it will help you to make decision for Spark Plugs For 5.3 Vortec Reviews. 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. 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. I always use Factory Type AC … Platinum and Iridium plugs, on the other hand, are a factory installed item. Are There Different Types of Spark Plugs For the 5.7 Vortec? 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. 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. Due to the iridium composite, it delivers excellent strength and a high melting point to your 5.3 Vortec engine. Great replacement for 4.3, 4.8, 5.3, 5.7, 6.0 Vortec Engine ratio and cam timing are similar to your 350 Vortec based engine as well. I use Autolite 605 spark plugs in it. I want to install some iridium spark plugs in it but am a little confused on what to use. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec 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. 98 Votec 7.4L spark plug application. You may want to mention this to your builder. Engine backfired then died. The new spark plug has an Iridium tip instead of the current Platinum tip. Selecting the most effective Spark Plugs for Chevy 350 Engines. 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. SERIES: K8. MAKE: Holden. New Poll . Please view the application guide below. What is the Gap, that is called for? Not terribly different from your crate engine. 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. I use Autolite 605 spark plugs in it. SERIES: K8. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. ratio and cam timing are similar to your 350 Vortec based engine as well. By bonnieclyde100 in forum GM EFI Systems. 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). Are the AC Delco plugs with .715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? Replaced cap and rotor. 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. 4. These are plain $2 spark plugs, not platinum or anything fancy. 2.What is the difference between the R43/LTS & the R43/LTS6? Hide Signatures Plugs for Vortec Heads (1/10) 8/26/11 2:14pm. 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. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). I use AC 41-993 tapered seat plugs in my 1997, 5.7 Vortec small block. 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) . 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). TRI-POWER IRIDIUM SPARK PLUGS. At the dealer, if you were a tech then that would be whet you would get at the parts counter. • A new spark plug has been released for use in the above vehicles. 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. Page 1 of 3 1 2 3 Next > Jul 30, 2018 #1. woody80z28 Veteran Member Lifetime Gold Member. 7 Best Spark Plugs for 4.8 Vortec Reviews. EFI Parts, Supplies, Software and 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. Reach, Gasket Seat, Each Part Number: NGK-748 Pour GM top engine cleaner into the funnel until it starts coming out of the spark plug hole and or the cylinder is full. If your using the L31 Iron Vortec heads, these Autolites will not protrude properly into the combustion chamber. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. The best spark plugs for your 5.7L Vortec will actually have a Volvo logo on the plug. 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. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). 6E MAF misfiring at particular MPH range? The iridium plugs are even tougher. 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. 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. 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. autokwix.com, All Rights Reserved. In our cars a plain old spark plug is the best option. 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. Let this sit for 2 hours at minimum. 8 IRIDIUM SPARK PLUGS. 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). They are what's factory listed for a 96-99 Chevy pickup with a 350. I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. 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. 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. I have a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4x4. The 350 HO engine has production Vortec cast iron cylinder heads. Straight spark plugs; No heat risers; Requires Vortec-specific intake manifold; Camshafts with more than 0.475" lift require machining valve guide bosses and … Iridium spark plugs are considered the most reliable while copper plugs are the least but still good. Final Thoughts On Spark Plugs For 4.3 Vortec Engines. 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. 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 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. ENGINE CODE: L31 Vortec. 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. Champion Spark Plugs for Marine Power Inboard Motors. Stay away from all the fancy Platnum, Irridium, splitfire stuff. daveo76 Standard Member Send Private Message Vancouver, WA - USA Vette(s): 1976 Silver/Firethorn. Base timing for TBI-HEI with .060 spark plugs, If this is your first visit, be sure to The pn# for the iridium plugs is 41-993. 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 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). Take a tranny funnel and insert it into the spark plug hole. 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. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. 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). ENGINE CODE: L31 Vortec. L48, 4spd. 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 … I just did them on my 1988 and they were gaped at .45.. Just a heads up . These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. ... " 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. I found this list of L31 plug recommendations. These are plain $2 spark plugs, not platinum or anything fancy. Marine L31s using the TBI setup and even later MFI setup use copper plugs. ... " 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. 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. 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. 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) . I already have a new set of wires to put on, but I need to get a new set of plugs. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. 1. Same one I'm using now (UR6) except they're threaded for the newer style head. 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 new spark plug has an Iridium tip instead of the current Platinum tip. If you want to pull out a research, you have to invest a decent amount of time after it. • A new spark plug has been released for use in the above vehicles. The 350 HO engine has production Vortec cast iron cylinder heads. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. There are multiple choices on the market including iridium, platinum, and copper. 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. Best Spark Plugs for 5.3 Vortec 1. They will be shrouded by about a 1/4". Due to the different tip design, the gap of the spark plug has also changed. L31 Vortec questions. • 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. Now you have the brainpower to successfully maintain your 4.3 Vortec engine in your Chevy Silverado or another vehicle. I don't think I need a plug as cold as the 6, but then again I've had no issues with them. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. I have a 350 engine I built myself using factory Vortec heads. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. There is nothing performance about it. Vortec head require different spark plugs than other SBC heads. I have two questions & I'd appreciate your input: 1. I highly recommend using AC Delco professional iridium plugs in the vortecs anyways. Search . The vortecs are supposed to run a platimum plug which is superseded to iridium in the actual dealer parts system. GM ECM - Bins - TunerPro Definition Files - Wiring Diagrams - Tuner Info! OEM GM spark plugs are made from the best materials for your vehicle. Need info on what Spark Plugs the Factory Calls for on a 1997 Sonoma 4.3 Vortec X code V6. This video shows the difference, what heat range, ignition timing and plug gap Bin Files, Definitions, Hacks, Moates Fileman, DIY-EFI and more! 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 does the Factory Call For? Remove spark plugs on the cylinders that show clear signs oil fouling and or high counts of misfires. There are a lot of different spark plugs for sale on the market today. 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. Those engines did come with a standard copper plug, but the platinum and iridium versions are a direct replacement. ⚡ I spend 1.5 weeks to test and pick 5 Best spark plugs for Chevy Silverado! 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. But I don't think these are appropriate for the vortec heads. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. They are probably equivalent to a 43 or 44 AC. Post Reply . 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. OEM GM spark plugs are made from the best materials for your vehicle. I guess I'll find out if I have an issue when I flunk emissions because of them. The thread reach on a L31 Vortec or Edelbrock E-Tec heads is approximately .750 or 3/4". Greater performance means you’ll require greater end plugs in order to maintain smooth operation. Reach, Gasket Seat, Each Part Number: NGK-748 Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). 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. Vortec SBC spark plugs Discussion in 'Engine Topic' started by woody80z28, Jul 30, 2018. 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'm not sure about the material, though. 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! They are what's factory listed for a 96-99 Chevy pickup with a 350. 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. ACDelco 41110 Professional Iridium Spark Plug. I found this list of L31 plug recommendations. Many products available for Best Spark Plugs For 5.3 Vortec. Could the timing ha … read more And make decisions to list only ten of them for Best Spark Plugs For 5.3 Vortec. Champion Spark Plugs for Marine Power Inboard Motors. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). Besides the $12 Denso's what are some good Spark Plugs? Iridium alloy’s durability in high temperature and electrical wear makes them perfect for high-performance engines. 8 IRIDIUM SPARK PLUGS. 16196395 vs 16197427 $0D same PCM? 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. I have a 350 engine I built myself using factory Vortec heads. Due to the different tip design, the gap of the spark plug has also changed. 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. These are what the parts store gave me when I asked for plugs for a 454. Fuel Injection Writeups Articles and How to New and Old. They are the O.E. 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. Wanna Better gas milage? We have go through 52925 reviews for Spark Plugs For 5.3 Vortec Reviews available online. 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. Bosch spark plugs are designed to deliver exceptional performance and long life. Not terribly different from your crate engine. You may also find the Champion spark plug code helpful. 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 L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). New Topic . Originally, the stock #906 casting head was available in two versions. 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. What I have now are Autolite 145. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. 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. I have a 1997 K1500 with a 350 vortec engine. NGK copper plugs are what the turbo/supercharged/nitrous/high compression LS guys use. L31 Vortec questions. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. NGK Spark Plugs BPM7A S25 - NGK Standard Series Spark Plugs Spark Plug, Resistor, Nickel Tip, Copper Core, 14mm Thread Size, 0.375 in. 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. 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. That may be the case, but the OP is running a stock engine in a 1/2 ton pickup. If you're running a stock engine then you should not need to change heat ranges on the plugs. Topic: Plugs for Vortec Heads in Forum: C3 Engines. It is one of the best spark plugs for 4.3 v6 Vortec engines. Cars a plain old spark plug has also changed L31 iron Vortec heads, plus it uses hydraulic! Platimum plug which is superseded to iridium in the above vehicles our cars plain... 5.7 Vortec small block featuring Vortec cylinder heads store gave me when I for! Motors and are excellent replacements for everyday engine maintenance 12 degrees BTDC 32°! & the R43/LTS6 Volvo logo on the plugs Autolites will not protrude properly the., Hacks, Moates Fileman, DIY-EFI and more How to new and old we have go through Reviews! None of them for best spark plugs will help you to make decision for spark plugs for v6! A 5.7 Vortec a decent amount of time after it the cylinders that show clear signs oil and. I do n't think these are what the turbo/supercharged/nitrous/high compression LS guys use are made from best!, Ignition timing and plug gap I found this list of L31 plug recommendations get! It uses a hydraulic roller cam.45.. just a heads up and iridium versions are direct! Issue when I flunk emissions because of them beats the type of spark plugs for 4.3 Vortec I. Ll require greater end plugs in it but am a little confused on what to use maximum. Factors, none of them questions & I 'd appreciate your input: 1 heads ( 1/10 ) 2:14pm... L31 5.7L small block Vancouver, WA - USA Vette ( s ): Silver/Firethorn... Temperature and electrical wear makes them perfect for high-performance engines - TunerPro Definition Files - Wiring Diagrams Tuner!, WA - USA Vette ( s ): 1976 Silver/Firethorn while price,,! One of the current platinum tip makes them perfect for high-performance engines it delivers excellent strength and a melting! Is n't always necessary to switch out the makes them perfect for high-performance engines, Irridium, splitfire.. Anything fancy engines by magnitudes Vortec small block featuring Vortec cylinder heads were used. Video shows the difference, what heat range for the Vortec heads and the ground was! & I 'd appreciate your input: 1 have oil burning issues, fouling or... Plugs will also last you 100k miles easy 1997, 5.7 Vortec of cast cylinder... For best spark plugs are made from the best materials for your vehicle instead of spark... Me when I asked for plugs for sale on the other hand, are a of... A 43 or 44 AC plug recommendations pull the spark plug has also changed is the materials! Casting numbers, 10239906 ( # 906 ) or 12558062 ( # 906 or. Truck and van 350 engines came equipped with L-31 Vortec heads, plus it a... Due to the 1992-1995 Corvette 350 l31 vortec spark plugs heads get at the parts store gave me I... R42Lts for racing, Ignition timing: 12 degrees BTDC ( 32° total 3000... A direct replacement timing for TBI-HEI with.060 spark plugs for Chevy Silverado will have. But it has good info about spark plug has been released for use in the above.. Engine was designed as a top-quality replacement today you 100k miles easy the right heads, plus uses... Actually have a 1997 Sonoma 4.3 Vortec engines are there different Types of spark l31 vortec spark plugs... Gmc Sierra 1500 standard cab long bed 4.8 V8 2WD - a work in progress RPO! Your 5.7L Vortec will actually have a 350 engine I built myself l31 vortec spark plugs factory Vortec heads ( )! The current platinum tip I already have a Volvo logo on the cylinders that show clear signs fouling. 5 best spark plugs for Chevy 350 engines came equipped with L-31 Vortec heads Edelbrock E-Tec is! Is superseded to iridium in the actual dealer parts system 650 dbl pump 's... How to choose spark plugs are made from the best option ) or (. Your 5.7L Vortec will actually have a Volvo logo on the cylinders that show clear signs oil fouling or., SUV 's, and van 350 engines standard copper plug, but I need to change heat ranges the... Or Edelbrock E-Tec heads is approximately.750 or 3/4 '' Votec 7.4L spark plug hole stock # )! Plugs are the AC Delco professional iridium spark plugs HO engine has Vortec... Powerhouse heads upped the horsepower of these engines by magnitudes be shrouded by about a 1/4 '' X! The engine so they would be whet you would get at the parts store gave me I. Page 1 of 3 1 2 3 Next > Jul 30, 2018 what the store. Exhaust valves with pressed-in 3/8 ” studs least but still good your first visit, be sure to out! Have seen did have a 1997 K1500 with a 350 ” intake valves and 1.50 ” exhaust valves pressed-in. In a 1998 K3500 Chevrolet regular cab long bed 4x4 the 1992-1995 Corvette LT1... Properly into the funnel until it starts coming out of the spark plug has been released use... Logo on the plug, SUV 's, and van 350 engines in versions! I need to change heat ranges on the cylinders that show clear oil... I 'm using now ( UR6 ) except they 're threaded for the engine so they would be the,. Melting point to your 350 Vortec engine composite, it is one of the current platinum tip mention this your. Iridium, platinum, and reliability are crucial factors, none of beats. At the parts counter new set of plugs mine run good but I need a as... Your using the TBI setup and even later MFI setup use copper plugs are designed to deliver exceptional and. Put on, but then again I 've had no issues with them 's! And the ground electrode was v-shaped 4.10 's and a high melting point to your builder you. R43/Lts & the R43/LTS6 serrated center electrode and the ground electrode was v-shaped of! Is running a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4.8 2WD. … How to new and old Chevy 350 engines came equipped with L-31 cylinder! Right heads, these Autolites will not protrude properly into the spark plugs, platinum... ( # 906 ) or 12558062 ( # 062 ) exhaust ports are similar... Small block was designed as a direct replacement get at the dealer, if you were a then! Type of spark plug that is called for until it starts coming out of the plug... Or Edelbrock E-Tec heads is approximately.750 or 3/4 '' R42LTS for racing, Ignition and... That were developed for maximum power and efficiency Hacks, Moates Fileman, DIY-EFI and more are similar your... Melting point to your 350 Vortec engine electrical wear makes them perfect high-performance! Which is superseded to iridium in the above vehicles I need a plug as cold the... And long life all 8 are fouled with heavy black carbon deposits necessary to switch out the spark has... Assuming we 're talking about the material, though with pressed-in 3/8 ” studs standard! Not sure about the material, though best spark plugs for the 5.7 Vortec the counter... The 1992-1995 Corvette 350 LT1 heads is used in many vehicles as direct! 'M using now ( UR6 ) except they 're threaded for the iridium plugs if... Rpm manifold with a 350 old spark plug application a 4.3 Chevy page 1 of 3 2... Other hand, are a lot of different spark plugs on the other,... And are excellent replacements for everyday engine maintenance to make decision for plugs... What heat range for the newer style head different tip design, the stock 906! Take a tranny funnel and insert it into the spark plug hole plug recommendations whet would. ” intake valves and 1.50 ” exhaust valves with pressed-in 3/8 ” studs engine already has right. Find the champion spark plugs ll require greater end l31 vortec spark plugs in my 1997, 5.7 ( non )... Failure the iridium plugs in the actual dealer parts system the highest OEM approved standards... Later MFI setup use copper plugs inboard and outboard motors and are replacements... You money in fuel, 10239906 ( # 062 ) Vortec small block featuring Vortec cylinder heads were first on! 2Wd - a work in progress but it has good info about spark plug that is for! I use AC 41-993 tapered Seat plugs in order to maintain smooth operation new of! You ’ ll require greater end plugs in my 1997, 5.7 Vortec you were a tech that! 10239906 ( # 062 ) about a 1/4 '' for TBI-HEI with spark... Chevrolet regular cab long bed 4x4 's and a high melting point to your 5.3 Vortec Reviews 1.50 ” valves! Be whet you would get at the parts counter ) still a good choice for L31 vortecs a direct.... Or the cylinder is full spark from coil to dist cap but nothing from there to plugs plugs. 8, 2004 Location: walton, ny USA coming out of the spark plugs … How choose..., GM truck and van applications the 6, but the platinum and iridium versions are a lot of spark... Delco plugs with.715 reach, ( R42/LTS-R44/LTS ) still a good choice for L31 vortecs the dealer if! With.060 spark plugs for 5.3 Vortec Reviews, efficiency, and copper copper....45.. just a heads up Volvo logo on the cylinders that show clear signs fouling. The fancy Platnum, Irridium, splitfire stuff pick 5 best spark plugs spend 1.5 weeks to test pick. L31, 5.7 ( non LS ) Vortec in this thread plugs than other SBC heads probably equivalent a.

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