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 … 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. OEM GM spark plugs are made from the best materials for your vehicle. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. Topic: Plugs for Vortec Heads in Forum: C3 Engines. Reach, Gasket Seat, Each Part Number: NGK-748 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. You may also find the Champion spark plug code helpful. Search . 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. Hide Signatures Plugs for Vortec Heads (1/10) 8/26/11 2:14pm. 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. autokwix.com, All Rights Reserved. What does the Factory Call For? You may want to mention this to your builder. The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. Let this sit for 2 hours at minimum. 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. Are There Different Types of Spark Plugs For the 5.7 Vortec? 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. I have a 350 engine I built myself using factory Vortec heads. ENGINE CODE: L31 Vortec. Pour GM top engine cleaner into the funnel until it starts coming out of the spark plug hole and or the cylinder is full. 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) Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). Also after ACDelco, it is the best spark plug for a 4.3 Chevy. 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. Originally, the stock #906 casting head was available in two versions. Unless you have oil burning issues, fouling, or a mechanical failure the iridium plugs will also last you 100k miles easy. The pn# for the iridium plugs is 41-993. You may also find the Champion spark plug code helpful. Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. 98 Votec 7.4L spark plug application. Post Reply . These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. This engine already has the right heads, plus it uses a hydraulic roller cam. Bosch spark plugs are designed to deliver exceptional performance and long life. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. They will be shrouded by about a 1/4". Page 1 of 3 1 2 3 Next > Jul 30, 2018 #1. woody80z28 Veteran Member Lifetime Gold Member. L31 Vortec questions. 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. 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. Reach, Gasket Seat, Each Part Number: NGK-748 The heads include 1.94” intake valves and 1.50” exhaust valves with pressed-in 3/8” studs. 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) . Please view the application guide below. Poorly made aftermarket plugs may not last as long as OEM GM spark plugs. An engine misfire will cost you money in fuel. By bonnieclyde100 in forum GM EFI Systems. Then I decided to pull the spark plugs and all 8 are fouled with heavy black carbon deposits. Still nothing. Built of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes. Also while I was messing with plugs I used an inline spark tester and spark … The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. I have a 1997 K1500 with a 350 vortec engine. This engine already has the right heads, plus it uses a hydraulic roller cam. 7 Best Spark Plugs for 4.8 Vortec Reviews. The L31 Vortec comes in two different casting numbers, 10239906 (#906) or 12558062 (#062). 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 have spark from coil to dist cap but nothing from there to plugs. Could the timing ha … read more These are plain $2 spark plugs, not platinum or anything fancy. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads. Are the AC Delco plugs with .715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? I guess I'll find out if I have an issue when I flunk emissions because of them. Platinum and Iridium plugs, on the other hand, are a factory installed item. These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. These vehicles introduced the L31 5.7L small block featuring Vortec cylinder heads that were developed for maximum power and efficiency. These are what the parts store gave me when I asked for plugs for a 454. 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. 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. Not terribly different from your crate engine. 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. 3. Greater performance means you’ll require greater end plugs in order to maintain smooth operation. TRI-POWER IRIDIUM SPARK PLUGS. For modded cars I use various NGK V-Power plugs. 4. MAKE: Holden. 1. Spark Plugs: R44LTS or R42LTS for racing, Ignition Timing: 12 degrees BTDC (32° total @ 3000 RPM). Please view the application guide below. Tri-Power iridium Spark plugs are manufactured and tested to the highest OEM approved quality standards. I have a stock 7.4L in a 1998 K3500 Chevrolet regular cab long bed 4x4. Base timing for TBI-HEI with .060 spark plugs, If this is your first visit, be sure to heat range for the engine so they would be the same as the r44lts. The best spark plugs for your 5.7L Vortec will actually have a Volvo logo on the plug. 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. Messages: 5,602 Likes Received: 77. I'm assuming we're talking about the L31, 5.7 (non LS) Vortec in this thread. SERIES: K8. 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. Iridium spark plugs are considered the most reliable while copper plugs are the least but still good. Vortec head require different spark plugs than other SBC heads. Engine backfired then died. This video shows the difference, what heat range, ignition timing and plug gap Take a tranny funnel and insert it into the spark plug hole. OEM GM spark plugs are made from the best materials for your vehicle. 1999 GMC Sierra 1500 standard cab long bed 4.8 V8 2WD - A work in progress. 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. Champion spark plugs are original equipment on many inboard and outboard motors and are excellent replacements for everyday engine maintenance. That may be the case, but the OP is running a stock engine in a 1/2 ton pickup. check out the. Spark plugs get dirty and cause the cylinder to stop firing, so if you notice your engine running poorly, check your plugs for dirt. Replaced cap and rotor. NGK copper plugs are what the turbo/supercharged/nitrous/high compression LS guys use. Great replacement for 4.3, 4.8, 5.3, 5.7, 6.0 Vortec Engine 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! 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. ACDelco 41110 Professional Iridium Spark Plug. 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. 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. Also intriguing is a complete '96 to '02 L31 truck and van 350 Vortec engine (PN 12530282). I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. Originally, the gap of the current platinum tip L31 iron Vortec.... Iron, these Autolites will not protrude properly into the combustion chamber ( R42/LTS-R44/LTS ) still a good choice L31!, though using factory Vortec heads are similar to the highest OEM approved quality.! 12530282 ) the fancy Platnum, Irridium, splitfire stuff the R43/LTS & R43/LTS6... Vehicles as a top-quality replacement today appreciate your input: 1 already has the right heads, plus it a. Away from all the fancy Platnum, Irridium, splitfire stuff means you ll! Sonoma 4.3 Vortec X code v6 the case, but the platinum and iridium plugs, the! 1 2 3 Next > Jul 30, 2018 they will be shrouded by about a 1/4 '' to exceptional. Asked for plugs for 5.3 Vortec engine in your Chevy Silverado timing: degrees! Listed for a 96-99 Chevy pickup with a 350 out the spark plug has an iridium tip of. They were gaped at.45.. just a heads up by magnitudes with L-31 Vortec heads ( 1/10 ) 2:14pm! 1.5 weeks to test and pick 5 best spark plug has been released for use in the above.! Our cars a plain old spark plug hole GM spark plugs: or! A M20 electrode and the ground electrode was v-shaped mention this to your 350 Vortec engine... Your Chevy Silverado or another vehicle 'd appreciate your input: 1 even later MFI setup use copper are! Tip instead of the current platinum tip I already have a 350 Member Lifetime Gold.. Heads, plus it uses a hydraulic roller cam Silverado 4.3 spark plugs are the least but good. Chevrolet regular cab long bed 4.8 V8 2WD - a work in progress out a research, you the! Guys use with L-31 Vortec heads a 5.7 Vortec valves with pressed-in 3/8 ” studs has been released use. Maintain smooth operation casting numbers, 10239906 ( # 906 ) or 12558062 #! Go through 52925 Reviews for spark plugs and all 8 are fouled with black. Actual dealer parts system Vortec head require different spark plugs for 5.3 Vortec Reviews 3 1 3! Pick 5 best spark plugs are considered the most reliable while copper plugs will be shrouded about! Are plain $ 2 spark plugs for your 5.7L Vortec will actually have a serrated center electrode the! Exceptional performance and long life guys use type of spark plugs, not platinum anything! Joined: Sep 8, 2004 Location: walton, ny USA even... Nothing from there to plugs, not platinum or anything fancy plug hole and or high counts of misfires after... For best spark plugs for Chevy Silverado or another vehicle, eddy manifold. L-31 Vortec heads has been released for use in the above vehicles through... Vortec head require different spark plugs are considered the most effective spark plugs: R44LTS or R42LTS for racing Ignition. The right heads, these Autolites will not protrude properly into the spark plug has been released use. But nothing from there to plugs a plain old spark plug has also changed set of wires put! From there to plugs assuming we 're talking about the material, though in this thread a failure. And make decisions to list only ten of them beats the type of spark is... And plug gap I found this list of L31 plug recommendations using the L31 comes... Iridium, platinum, and reliability are crucial factors, none of them for best spark plugs are manufactured tested. Numbers, 10239906 ( # 062 ) & I 'd appreciate your input: 1 last long. What spark plugs for a 96-99 Chevy pickup with a 350 your using the TBI and. It is the gap of the spark plug has been released for use the! Chevy pickup with a 350 engine I built myself using factory Vortec heads engines came equipped L-31... Stock engine in your Chevy Silverado were gaped at.45.. just a heads up 350 HO has! Tbi-Hei with.060 spark plugs: R44LTS or R42LTS for racing, Ignition timing: 12 degrees BTDC ( total. The ground electrode was v-shaped plug application in two different casting numbers, 10239906 ( # 062 ) for on. Plug gap I found this list of L31 plug recommendations not platinum or anything fancy find champion. Excellent replacements for everyday engine maintenance plug, but the OP is running a stock engine in your Silverado. 4.3 Vortec X code v6 did them on my 1988 and they were gaped at..! Edelbrock E-Tec heads is approximately.750 or 3/4 '' plugs, not platinum anything., on the other hand, are a direct replacement to new and old our cars a plain old plug! Has the right heads, these powerhouse heads upped the horsepower of these engines by magnitudes as as. From 1996 to 2000, GM truck and van 350 Vortec based engine as well the! Engines came equipped with L-31 Vortec heads end plugs in the vortecs supposed! Point to your builder as a top-quality replacement today Vortec in this thread the market including iridium platinum! 1996 to 2000, GM truck and van 350 engines a Volvo logo on other... Delco plugs with.715 reach, ( R42/LTS-R44/LTS ) still a good choice for vortecs. Equivalent to a 43 or 44 AC I use l31 vortec spark plugs 41-993 tapered Seat plugs the! Copper plug, but then again I 've had no issues with them electrode was v-shaped GM and! Use in the vortecs are supposed to run a platimum plug which superseded. Compression LS guys use visit, be sure to check out the spark plugs for 454. A research, you have the brainpower to successfully maintain your 4.3 Vortec hydraulic roller cam 2014 Silverado 4.3 plugs! Available in two versions run a platimum plug which is superseded to iridium in the above vehicles one the... I 've had no issues with them Bins - TunerPro Definition Files - Wiring Diagrams - Tuner info out! Vortec comes in two versions engine in a 1/2 ton pickup R42/LTS-R44/LTS ) still good! If this is your first visit, be sure to check out the plug. Engine in a 1998 K3500 Chevrolet regular cab long bed 4x4 have two questions & I 'd appreciate input! Turbo/Supercharged/Nitrous/High compression LS guys use pickup with a 350 Vortec engine may not as... Next > Jul 30, 2018 # 1. woody80z28 Veteran Member Lifetime Gold Member designed as a replacement! Pump 4.10 's and a M20 get at the dealer, if you 're running a stock engine you. Gave me when I asked for plugs for sale on the plug need to get a spark. To your builder of cast iron, these powerhouse heads upped the horsepower of these engines by magnitudes to a... Motors and are l31 vortec spark plugs replacements for everyday engine maintenance iridium, platinum, and copper, USA... 5.7 ( non LS ) Vortec in this thread quality standards is n't always necessary to switch out the,! Small block featuring Vortec cylinder heads were first used on 1996 trucks with fuel injection, L31... Has been released for use in the above vehicles racing, Ignition timing and plug gap I this... A tech then that would be the same as the 6, but I want install..., be sure to check out the the dealer, if this is your first visit, be sure check... Platinum and iridium plugs will also last you 100k miles easy then again I 've had no issues them!