$4.99 . Apart from the 5.3L Vortec engines, it also works great with the Chevy 350 5.7L engine. i thought that i had read somewhere previously that new (GM) plugs come out of the box ⦠A simple feeler gauge can be used to measure the gap. CHEVROLET 5.7L/350 NGK Spark Plugs Spark Plugs. In my quest to take care of the many known and unknown issues with my truck i bought used, changing plugs and wires was definitely on the list. dangerII. NGK Spark Plugs UR6 - NGK V-Power Spark Plugs. Some suggestions: AC/Delco are the factory stock plugs and I have had good success with them. 5 years ago. Also, the spark plug gap should never exceed .055" unless pre-set by the manufacturer. FAQ; 2000 4.8L Spark Plug Gap? If you find that a new spark plug is not available, there are a few options that you have. If your Chevy is misfiring, has lost its fuel economy, or if it is difficult to start, check the condition of the spark plugs. Wiper Blade. A-Team Performance Silicone Spark Plug Wires Set Compatible with SBC Small Block Chevy Chevrolet GMC Over The Valve Cover Wires 283 305 ⦠The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008" in either direction. The benefit of wider plug gaps is a more complete burning of the fuel mixture. I have access through a dealer portal for NAPA and can look up any part they list. Spark Tester. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. May 29 2015, 3:17am. If you donât pay attention, itâs very easy to install the wrong spark plug. R44TS Gap @ .045 (300 HP 350) 41-932 Gap @ .060 (330 HP 350) R44LTS Gap @ .045 (330 HP 350) Rapid Fire #8 @ .035 Ignition Timing ..... 10 BTDC @ 700 RPM. When you purchase a new spark plug for your 5.7L Vortec, make sure that it is a good one, because if it is not, then you will not get any kind of power out of it. SOB's wont list plugs by head design ⦠The documentation included within this information packet builds on the 350HO long block information. You can sign in to vote the answer. 1 decade ago. CHEVROLET > 2004 > SILVERADO 1500 > 4.8L V8 > Ignition > Spark Plug. The best spark plug gap setting 97 454 vortec - Chevrolet 1997 C/K 2500 question. Due to the wide variety of vehicles in which a 350 HO engine can be installed, some procedures and recommendations may not apply to specific applications. GM Vortec Marine Spark Plugs. Excessive changing of the spark plug gap setting will result in weakening of the spark plug ground electrode and can lead to breakage. Copper . This complete engine is assembled using brand new, premium quality components. $29.99 $ 29. The newly redesigned Vortec cylinder heads were intended to replace the swirl-port Throttle Body Injection heads that were previously used on GM 350 trucks. Browse Categories Answer Questions . Other features include anti-corrosion and anti-seizing. A special spark plug gap gauge (sometimes also referred to as a feeler gauge) can be used to both measure the gap and adjust it as necessary. Characteristics of NGK TR55 Spark Plug for 5.3L Engine are: There are several tools you can use to both measure and adjust the gap. Specs above, so I guess i need to read a little more, they do list the R44LTS for the 330hp head. Since you didn't state whether it is a V6 or V8, I'll give you both. Vortec 4800 4.8L V8; Forum main. Location: Main Index » Forum Index » Automotive General » Chevy High Performance Topics » best spark plugs for 350 engine FusionBB⢠Version 2.1 ©2003-2006 InteractivePHP, Inc. How do you think about the answers? The 350 HO engine is manufactured on production tooling; consequently you may encounter dissimilarities ⦠jimjamm65 Member Posts: 54 Joined: Thu Jul 08, 2010 5:10 pm Location: Re: 350 Chevy Engine with HEI- Spark Plug Gap? It also is easy to install thereby, giving a long-lasting spark. Here is a list of spark plug gaps for a Chevy Silverado. Purchased ACDelco 41-962 Professional Platinum Spark Plug and ACDelco 41-962 Professional Platinum Spark Plug Wire Set from Amazon. Post by jimjamm65 » Tue May 23, 2017 7:39 pm.045" Top. 0 0. Carbureted and EFI's like Indmar TBI, MCX, RTP, LQ9, LY6, LTR, LT1, Vortec ⦠spark plug gap 350290 hp chevy engine. 1987 SS Burgandy/Burgandy, Crate Vortec 350 - 330 HP, beefed up 200 4r, 15x8 Torq Thrust II's, Richmond 3.73s Posi Rear, Custom Tweed Interior - Under Restoration 1989 Camaro Iroc-Z Red with gray interior, 350 TPI, 700r4 1998 Chevy Silverado 4x4 Black 5.7L 33's Reg Cab, Long Bed 2008 Honda Civic Si 4 ⦠Characteristics of NGK TR55 spark plug that came with their car and then make. Of 0.050-0.055-inch they do list the R44LTS for the Chevrolet 5.7-liter 350 V-8 is 0.035 inch they! 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