A spark plug must be gapped correctly in order to leave enough room for the spark to ignite on the tip of the plug. Clean threads will allow for a proper seal and maximum performance. If needed, cylinder head threads can be cleaned by spark plug thread chaser in the correct size thread (10mm, 12mm, 14mm). Thanks 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. Wouldn't use an impact wrench for sure. The factory has had different torque specs for indexing sparkplugs since 1996. However, it is possible to tighten the plugs satisfactorily without a torque wrench. 4. This will help ensure proper seating and adequate heat transfer. Step-by-Step Instructions Tapered Seat Plugs. Bosch - 1/4 turn on plugs with a gasket. 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. Correct spark plug torque is the very most critical step of spark plug installation. Install the new spark plug and torque it down to 15-21 ft-lb (180-252 in-lb). 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. It's really hard to stretch a plug shell or strip the threads at less than 10 lbs of torque. How to change conical (tapered) seat spark plug without torque wrench - (only if torque wrench can not be obtained). Autolite - For spark plugs with a gasket: 1/4 turn on 10mm plugs, 3/8 turn on 12mm plugs, 1/2 turn on 14mm and 18mm plugs. The proper torque of a spark plug can only be achieved using a torque wrench. Conical seat - Spark plug is sealed in cylinder head with a conical (tapered) seat. 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. The proper torque of a spark plug can only be achieved using a torque wrench. Step One. Torque requirements vary greatly from engine to engine. 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! Before re-installing each coil, check condition of coil o-ring and replace if necessary. If gasket style spark plug is installed without sealing gasket, the combustion area will not seal sufficiently and heat removal (transfer of heat from the spark plug into the engine cylinder head) will not be sufficient. It is extremly important not to exceed the installation torque. 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. The last thing you want to do is overtorque spark plugs in an aluminum head. Wayne Dempsey's book gives 22 ft. lbs. See the illustration above. can all have an effect on how much torque is required to seat the spark plug correctly. It is extremely important to never exceed the spark plug recommended installation torque. The torque leaving the diff is equal to both shafts but is less at the wheel with the longer shaft due to the twisting. 1/12-1/8 turn on plugs with a tapered seat. When in doubt, always check your engine manufacturer's literature. 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. Torque is one of the most critical aspects of spark plug installation. In this case no sealing washer is used. 1/2-2/3 turn on plugs with a gasket. Using a spark plug socket and ratchet, turn new spark plugs (18mm and 14mm thread size) a half turn (180°) clockwise to tighten. m) torque. The assembly of spark plug with this kind of sealing requires an especially sensitive approach. - When replacing spark plugs, the engine must be close to the ambient temperature. 1/16 turn on plugs with a tapered seat. On the box its saying Aluminum heads and spark plugs with gasket torque to 18-21 ft lbs. 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. 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. 1/16 turn on plugs with a tapered seat. For 14mm threads, the recommended torque setting is about 7 to 15 ft-lbs. 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 using a torque wrench vs. plug wrench, please refer to the Torque Recommendations chart below. This goes for conical seat spark plugs only! 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. Similarly, if the threads are of 18mm, consider setting 15 to 20 ft-lbs. The production line used to specify up to 30 ft.-lbs and that is where the higher torque … Hi, Just Wanted to Double Check That the torque Sounds About Right for my 80kz1000e2. The first step required for proper torquing of a new replacement plug is to ensure you have clean thread surfaces. When installing a new spark plug, always follow the instructions listed in the engine manufacturer's literature. 2021 Spark Plugs. Spark Plug Installation. A copy of the FSM from 1998 also gives 22 + 2 ft. lbs. 3. Improper torquing can lead to damage. Correct torque is the very most critical step of spark plug installation. NGK ZFR5F-11 (2622) spark plug with gasket. At 374K miles, this is my third set of plugs that I have installed and never had an issue before. does that seem ridiculously light? 2. 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 . Getting conflicting info on the NGK spark plug torque spec. While it may not strip the threads it could certainly pull them a bit and eventually lead to stripped threads. I would never run a plug down to 16 Ft. Lbs in an aluminum head. 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. This according to both the Chilton manual and the owner's manual. Isn't a torque wrench the only way measure the ft. lbs. 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. 3. 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. And yes put alittle copper anti seize on the threads. Spark plugs create a small explosion inside the motor when combined with fuel, thus engaging the pistons on your outboard motor. It's easy to mess up spark plug threads The low torque spec in this case is to protect the threads in the head, it's not unusual for other engines with iron heads using NGK to have a 20+lb plug torque spec. One of my old plugs was stripped, and so was the hole into which it threads. DUE TO DIFFERENCES IN DESIGN AND MATERIALS THE SPARK PLUGS OF VARIOUS MANUFACTURERS DO NOT HAVE EXACTLY THE SAME HEAT RANGE. Feel free to download this catalog for any information reference of Brisk Spark Plugs. When in doubt, always check your engine manufacturer's literature. Anyway, I'd stick with the turns-past-contact method as specified on the plug box. Install the new plug finger tight, and complete the installation with a torque wrench. Not sure how accurate it is. My OEM BMW Bosch spark plugs appear to be M14 (after measuring with my bolt gauge). To gap spark plugs always use a spark plug gapping tool. If you do not have a torque wrench install plugs snug and then turn 1/4 turn. I have always felt the factory goes a bit overboard on it's torque specs on certain things. The table below lists the torquing specifications for most spark plugs being installed in either cast iron or aluminum cylinder heads. That and some common sense should guide you. How to change gasket (washer) style spark plug without torque wrench - (only if torque wrench can not be obtained). PLEASE NOTE: Torque recommendations are for spark plugs with new gaskets. For a brand new head, 22 ft/lbs may work ok, but after that, I'd prefer to tone it down a little bit. 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. So did a bunch of work to my car and got a torque wrench out to do spark plugs. 3. Torque requirements vary greatly from engine to engine. Has Porsche put out a service bulletin on this? for the size and thread style of plugs used in FICHT, DI, and E-TEC engines. What is the torque setting for spark plugs? 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. ITEM TORQUE SPECIFICATION (Foot-pounds / Newton-meters) Spark plugs: 11-17 (132-204 in-lbs) Engine oil drain plug (19mm) 22-30/31-41: Gearbox drain plug (24mm) I've done snug but if you don't have a good feel for tools and properly tightening parts use a torque wrench. 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. too. Most people on this forum are doing something like 10-14 ft lbs with NGK plugs… Install the coil pack and torque the bolts down to 64-95 in-lb (5.33-7.2 ft-lb). But a torque wrench should be safe. Use the Champion torque recommendation below as a guide for tightening all spark plugs. Torque directly affects the ability of the spark plug firing end to dissipate heat to the cylinder head. Without a Torque Wrench: If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten. Care must be taken when torquing spark plugs, especially in softer aluminum cylinder heads. 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. I used a torque wrench set to 18 ft. lbs. 2010 Prius spec is 13 ft lbs. 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% ! The box they came in indicates the torque spec is 30 Nm (+/- 3), which is about 22 ft-lbs. Care must be taken when torquing spark plugs, especially in softer aluminum cylinder heads. The Bentley manual (page 3-30) gives spark plug torque as 22 + 2 ft. lbs. This video is about Proper Torque - Spark Plugs By NGK:https://www.denniskirk.com/ngk 180Marty thanked for this post 04-01-2017, 11:20 AM #2 If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten. 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. Torque values assume clean, dry threads. A spark plug that is under-torqued will not be fully seated in the cylinder head and heat dissipation will be slowed. 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. 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. Spark plugs are constructed by using two different manners of sealing in cylinder head. applied? It is 11 lbs ft. Or 132 lbs in. I had to clean up the threads with a tap (same size) and luckily that worked fine. I know that my 2000 Camry calls for 13 ft/lbs torque for spark plugs. 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. Without a Torque Wrench: If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten. Champion sparkplugs says 22 ft-lbs max. Per Auto Zone repair guide: Non-hybrid Spark plug and cylinder head threads needs to be free of carbon build up, clean, and it is recommended, free of lubricant. 08 ZX-14 manual says 115 inch-lbs for spark plug torque, so under 10 ft-lbs? If using anti-seize compound, use sparingly and reduce torque by 30%. Dielectric grease prevents missfires, keeps the moisture out, and ease the future removal of the spark plug wire or the spark plug boot. 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). Autolite - For spark plugs with a gasket: 1/4 turn on 10mm plugs, 3/8 turn on 12mm plugs, 1/2 turn on 14mm and 18mm plugs. Clean the outside of the coil tube with a damp rag. In this case sealing washer must be used (comes with new spark plugs). 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. For proper spark plug installation, it is always highly recommended to use spark plug removal and installation tool and spark plug torque wrench. This will help ensure proper seating and adequate … To me, 15 ft/lbs is plenty tight for a spark plug in an aluminum head. Then a spark plug wrench should be used to tighten the spark plug by turning an additional angle as follow: IMPORTANT !!! A tapered-seat spark plug should be tightened by 1/16th of a turn past finger tight. 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. spark plug torque specs Looks like 115 inch pounds and no lube or anti-seize is exactly what the manual says. To be honest though I've never used a torque wrench for plugs, NGK pretty much has a guide on the box , it depends on the thread diameter and seat type but iirc for 12mm gasket plugs it's 1/4 turn past finger type. And while we're on the subject do you torque to 25, 30 or 35 ft. lbs on your Lycoming spark plugs. It is extremly important not to exceed the installation torque. The use of anti-seize or thread lubricants will modify these values unpredictably, so read the product instructions carefully before proceeding. The area around the spark plugs should be cleaned with compressed air (or air in the can) to prevent foreign debree from falling into the combustion chamber. Tighten new or reused gasket spark plugs as follows: Hand tighten the spark plug until it seats. Tighten used plugs 30°. Providing it's accurate, is there really a risk of over torquing? When replacing spark plugs, BASIC IDENTIFICATION OF SPARK PLUG - is necessary for determination of the correct spark plug installation troque.