And yes put alittle copper anti seize on the threads. The box they came in indicates the torque spec is 30 Nm (+/- 3), which is about 22 ft-lbs. Torque is one of the most critical aspects of 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. Similarly, if the threads are of 18mm, consider setting 15 to 20 ft-lbs. This will help ensure proper seating and adequate heat transfer. of torque. 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 . Torque values assume clean, dry threads. 1/12-1/8 turn on plugs with a tapered seat. Getting conflicting info on the NGK spark plug torque spec. Clean the outside of the coil tube with a damp rag. 3. When in doubt, always check your engine manufacturer's literature. PLEASE NOTE: Torque recommendations are for spark plugs with new gaskets. The proper torque of a spark plug can only be achieved using a torque wrench. If you are inspecting and replacing an existing plug, be sure to use a wire brush to clean any debris from the plug's threads. That and some common sense should guide you. If spark plug thread lubricant (antisieze) is used when replacing spark plugs, it shoud be used very sparingly on the spark plug thread only and the spark plug installation torque is to be reduced by about 25% ! Install the new plug finger tight, and complete the installation with a torque wrench. One of my old plugs was stripped, and so was the hole into which it threads. I believe NGK is now the recommended spark plug (by BMW), or, put another way, the ones that have the BMW name on them are NGKs. Then a spark plug wrench should be used to tighten the spark plug by turning an additional angle as follow: IMPORTANT !!! When replacing spark plugs, for proper spark plug installation it is always highly recommended to use spark plug removal and installation tool and spark plug torque wrench. Has Porsche put out a service bulletin on this? Methods of spark plugs sealing in the engine cylinder head: How to Change Spark Plugs - Replacing Spark Plugs using torque wrench, Development Trends Of Spark Plug Dimensions, Spark Plug Suppression Of Quenching Effect, Spark Plug Tightening Torque During Installation. 2. However, it is highly recommended to use spark plug dielectric grease in the spark plug wire cable boot, or Coil on Plug boot prior connecting to the spark plug. Install the new spark plug and torque it down to 15-21 ft-lb (180-252 in-lb). Personally, I do not use a torque wrench on plugs and trust feel more than a spec that may cause more trouble than any help it offers. When installing a new spark plug, always follow the instructions listed in the engine manufacturer's literature. Care must be taken when torquing spark plugs, especially in softer aluminum cylinder heads. Spark plug and cylinder head threads needs to be free of carbon build up, clean, and it is recommended, free of lubricant. If you overtighten spark plugs that have an aluminum cylinder head, it can cause the shell of the spark plug to distorts, which leaves you with a broken seal between the porcelain and metal components – leading to a combustion leak. NOTE: If you have high performance alloy or aluminum heads, always use a torque wrench to eliminate any possibility of damaging the engine's internal threads. Wayne Dempsey's book gives 22 ft. lbs. The factory has had different torque specs for indexing sparkplugs since 1996. 4. Providing it's accurate, is there really a risk of over torquing? 180Marty thanked for this post 04-01-2017, 11:20 AM #2 NGK ZFR5F-11 (2622) spark plug with gasket. Step-by-Step Instructions Tapered Seat Plugs. The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. 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. 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. If you do not have a torque wrench install plugs snug and then turn 1/4 turn. Before re-installing each coil, check condition of coil o-ring and replace if necessary. What is the torque setting for spark plugs? Torque requirements vary greatly from engine to engine. Never pry the ground electrode with a screwdriver or similar object. 08 ZX-14 manual says 115 inch-lbs for spark plug torque, so under 10 ft-lbs? 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. Spark plugs create a small explosion inside the motor when combined with fuel, thus engaging the pistons on your outboard motor. Spark Plug Installation. spark plug torque specs Looks like 115 inch pounds and no lube or anti-seize is exactly what the manual says. applied? Anyway, I'd stick with the turns-past-contact method as specified on the plug box. When replacing spark plugs, BASIC IDENTIFICATION OF SPARK PLUG - is necessary for determination of the correct spark plug installation troque. Clean threads will allow for a proper seal and maximum performance. Step One. 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. In this case no sealing washer is used. Most people on this forum are doing something like 10-14 ft lbs with NGK plugs… 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. Bosch - 1/4 turn on plugs with a gasket. 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. 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. This according to both the Chilton manual and the owner's manual. How to change gasket (washer) style spark plug without torque wrench - (only if torque wrench can not be obtained). In this case sealing washer must be used (comes with new spark plugs). Clymer States 20 ft/ lbs for The spark plugs but I Am Double Checking as I Know Zoro Found one listing in The Clymer That was incorrect. Correct torque is the very most critical step of spark plug installation. How to Change Spark Plugs - Spark Plugs Methods of Sealing, Spark Plugs Installation and Spark Plug Gap Chart sections of this page are here to help you better understand the most critical steps and procedures in changing spark plugs. Care must be taken when torquing spark plugs, especially in softer aluminum cylinder heads. It's really hard to stretch a plug shell or strip the threads at less than 10 lbs of torque. The proper torque of a spark plug can only be achieved using a torque wrench. Then a spark plug wrench should be used to tighten the spark plug by turning an additional angle as follow: Sealing with a gasket (washer) - spark plugs can never be mounted into cylinder head without a sealing gasket (washer). 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