After threading the spark plugs into the cylinder head until they’re seated, torque each spark plug to 20 ft-lbs of torque; DO NOT OVER TORQUE THE SPARK PLUGS! A tapered-seat spark plug should be tightened by 1/16th of a turn past finger tight. does that seem ridiculously light? Don't know about every one but not having a feel for inch pounds my mind automatically wants foot pounds to be able to close out the thought and at a conversion of 12 inch pounds per foot pound would equal 9.58 . I had to clean up the threads with a tap (same size) and luckily that worked fine. This will help ensure proper seating and adequate heat transfer. Then a spark plug wrench should be used to tighten the spark plug by turning an additional angle as follow: IMPORTANT !!! The information provided below has been estimated for standard engines: In most engines, replacement plugs can be installed without using a torque wrench but extra care should be taken to ensure the new spark plug seats and seals properly. Care must be taken when torquing spark plugs, especially in softer aluminum cylinder heads. 4. When replacing spark plugs, BASIC IDENTIFICATION OF SPARK PLUG - is necessary for determination of the correct spark plug installation troque. Without a Torque Wrench: If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten. Install the new plug finger tight, and complete the installation with a torque wrench. If using anti-seize compound, use sparingly and reduce torque by 30%. 08 ZX-14 manual says 115 inch-lbs for spark plug torque, so under 10 ft-lbs? Providing it's accurate, is there really a risk of over torquing? How to change gasket (washer) style spark plug without torque wrench - (only if torque wrench can not be obtained). In this case no sealing washer is used. Torque is one of the most critical aspects of spark plug installation. THIS CROSS REFERENCE TABLE IS INFORMATIVE ONLY. Never pry the ground electrode with a screwdriver or similar object. When replacing spark plugs without spark plug torque wrench, spark plugs should be threaded-in by spark plug removal and installation tool, or socket by hand (without spark plug wrench) untill they fully seat. Correct spark plug torque is the very most critical step of spark plug installation. The Bentley manual (page 3-30) gives spark plug torque as 22 + 2 ft. lbs. NOTE: Manufacturers' torque specifications always take precedence over the specifications shown in the table above.Exercise care when installing spark plugs as varying conditions such as temperature, threads, etc. Notes "spark plug applications are subject to change". 3. I've done snug but if you don't have a good feel for tools and properly tightening parts use a torque wrench. It's easy to mess up spark plug threads can all have an effect on how much torque is required to seat the spark plug correctly. Wouldn't use an impact wrench for sure. A spark plug must be gapped correctly in order to leave enough room for the spark to ignite on the tip of the plug. Feel free to download this catalog for any information reference of Brisk Spark Plugs. 1/16 turn on plugs with a tapered seat. Use the Champion torque recommendation below as a guide for tightening all spark plugs. When in doubt, always check your engine manufacturer's literature. 1/12-1/8 turn on plugs with a tapered seat. This ensures air tight connection which prevents spark flash-over (spark on the outside of the spark plug between the spark plug High Voltage terminal and the spark plug shell) which will cause spark plug missfire and engine hesitation. Anyway, I'd stick with the turns-past-contact method as specified on the plug box. It is extremly important not to exceed the installation torque. If you do not have a torque wrench install plugs snug and then turn 1/4 turn. This according to both the Chilton manual and the owner's manual. DUE TO DIFFERENCES IN DESIGN AND MATERIALS THE SPARK PLUGS OF VARIOUS MANUFACTURERS DO NOT HAVE EXACTLY THE SAME HEAT RANGE. m) torque. This goes for conical seat spark plugs only! Champion sparkplugs says 22 ft-lbs max. At 374K miles, this is my third set of plugs that I have installed and never had an issue before. Most people on this forum are doing something like 10-14 ft lbs with NGK plugs… What is the torque setting for spark plugs? To gap spark plugs always use a spark plug gapping tool. Care must be taken when torquing spark plugs, especially in softer aluminum cylinder heads. It is 11 lbs ft. Or 132 lbs in. This video is about Proper Torque - Spark Plugs By NGK:https://www.denniskirk.com/ngk Using a spark plug socket and ratchet, turn new spark plugs (18mm and 14mm thread size) a half turn (180°) clockwise to tighten. I would never run a plug down to 16 Ft. Lbs in an aluminum head. Spark Plug Installation. spark plug removal and installation tool, Musi Racing Opens 2020 Season With Victory At U.S. Street Nationals, BRISK USA SPARK PLUG CROSS REFERENCE TABLE. I know that my 2000 Camry calls for 13 ft/lbs torque for spark plugs. The last thing you want to do is overtorque spark plugs in an aluminum head. In this case sealing washer must be used (comes with new spark plugs). Without a Torque Wrench: If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten. Most car makers use aluminum alloys inside the cylinder heads of most cars, so it’s very important to tighten spark plugs to the correct torque. Has Porsche put out a service bulletin on this? too. If you use anti-seize (which I recommend) you can torque them to slightly less than 13 ft/lbs because the lubrication decreases the friction and they tighten more easily. 3. In the absence of this tool, the table below provides a generic guide to torquing a replacement plug based on the number of turns after the plug becomes finger-tight. A spark plug that is under-torqued will not be fully seated in the cylinder head and heat dissipation will be slowed. Install the new spark plug and torque it down to 15-21 ft-lb (180-252 in-lb). 1/2-2/3 turn on plugs with a gasket. Clean the outside of the coil tube with a damp rag. Step-by-Step Instructions Tapered Seat Plugs. When installing a new spark plug, always follow the instructions listed in the engine manufacturer's literature. The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. Torque directly affects the ability of the spark plug firing end to dissipate heat to the cylinder head. When in doubt, always check your engine manufacturer's literature. For best high voltage insulation, to prevent arcing-over on the outside of the aluminum oxide insulator and to repel moisture, always apply a high quality silicone grease to the inside of the spark plug boot. Since my understanding is that this torque spec is a "dry" spec, and I put a LIGHT coating of anti-seize on the threads, when I installed new plugs last December I torqued them to 19 ft-lbs to allow for this. Torque values assume clean, dry threads. However, it is possible to tighten the plugs satisfactorily without a torque wrench. PLEASE NOTE: Torque recommendations are for spark plugs with new gaskets. The production line used to specify up to 30 ft.-lbs and that is where the higher torque … Thanks Conical seat - Spark plug is sealed in cylinder head with a conical (tapered) seat. spark plug torque specs Looks like 115 inch pounds and no lube or anti-seize is exactly what the manual says. 2021 Spark Plugs. When replacing spark plugs without spark plug torque wrench, spark plugs should be thread-in by spark plug removal and installation tool, or socket by hand (wihtout spark plug wrench) untill they fully seat. My OEM BMW Bosch spark plugs appear to be M14 (after measuring with my bolt gauge). If anti-seize compound is to be used, it should be applied sparingly because this could foul the plug and produce excessive carbon build-up on the threads, as well as give off fumes once the engine reaches operating temperature. Wayne Dempsey's book gives 22 ft. lbs. 2. The use of anti-seize or thread lubricants will modify these values unpredictably, so read the product instructions carefully before proceeding. Reinstall the ignition coils, wiring connectors, and wiring harness; torque the ignition and wiring harness bolts to 8 ft-lbs or just snuggly by hand. applied? 1/16 turn on plugs with a tapered seat. I have always felt the factory goes a bit overboard on it's torque specs on certain things. It is extremly important not to exceed the installation torque. Step One. The proper torque of a spark plug can only be achieved using a torque wrench. On the box its saying Aluminum heads and spark plugs with gasket torque to 18-21 ft lbs. Tighten new or reused gasket spark plugs as follows: Hand tighten the spark plug until it seats. However in order to ensure proper seating of a conical seat spark plug, it is a good idea to torque the spark plug, loosen it a 1/4 turn and torque it again. But a torque wrench should be safe. 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