When gapping new plugs, use a round feeler gauge.This helps prevent any debris from falling into the cylinder and causing engine damage. Before removing the old spark plugs, clean debris from the side of the plug area by using air pressure (use a shop vacuum).This helps break the boots loose without tearing. Rotate the spark plug boots 90-180 degrees before attempting to pull them off.Always be sure the engine is cool before beginning and gather all essential tools and products needed for the change, including replacement plugs, like Autolite® Double Platinum spark plugs, and mechanics gloves.It is good maintenance procedure to change all the plugs simultaneously. The Autolite® brand recommends that do-it-yourselfers follow manufacturer's recommendations on spark plug change intervals.
ARE AUTOLITE SPARK PLUGS PRE GAPPED MANUAL
It is recommended that you follow the instructions listed in the vehicle service manual or as instructed by your local vehicle dealer or a reputable mechanic for specific spark plug service and replacement. Spark plug installation may require the removal of engine components and may require that specific vehicle manufacturer procedures be followed to ensure proper service and safety.
ARE AUTOLITE SPARK PLUGS PRE GAPPED PROFESSIONAL
If you’re unsure what size spark plug socket you’ll need for the job you can use the new spark plugs to locate a correctly sized socket while at the store.As a spark plug manufacturer and not an automobile service facility, professional liabilities prevent us from providing instruction on specific spark plug removal and installation. Most engines use either 5/8” or 13/16” hex spark plugs, although other sizes are required for some applications. Spark plug sockets will often have a hex bolster on the drive end, allowing the use of a wrench to increase usability in hard to reach locations. Some spark plugs sockets also incorporate a magnet that will hold the spark plug terminal in place making removal of the spark plug from the engine easier. Spark plug sockets have a rubber insert that surrounds the insulator and holds it evenly inside the socket during installation.
The easiest way to avoid these concerns is to use a socket designed for spark plug service. Angular force, from an uneven socket, can cause cracks in the insulator leading to engine misfires and the spark plug having to be replaced again. When removing, and especially when installing spark plugs care should be taken not to stress the ceramic insulator of the spark plug. There is no voltage or power increase to be expected from using a racing spark plug in an otherwise stock engine and use will likely lead to premature plug fouling They are designed for high RPM and continuous wide-open-throttle use. Racing Spark Plugs are not indended for daily driving, low speed use. Racing spark plugs typically use a shorter side electrode to increase heat transfer to the shellĪutolite X Racing Spark Plugs use a projected dome surface gap design Racing Spark Plugs use colder heat ranges compared to OE spark plugs What are Racing Spark Plugs and when should they be used? A racing spark plug allows engine builders and tuners to maximize the power output from their engines by using the spark plug as a tool for adjusting fuel, timing, and other engine parameters to make sure that the engine is safely making maximum power. The common misconception is a racing spark plug generates more voltage or can produce more engine power simply from installing it. We are often asked about Autolite AR Racing spark plugs and the benefits of using them compared to a conventional copper core Autolite spark plug. Only use anti-seize where it is OE recommended No longer necessary as modern spark plug coatings work as a releasing agent and should be installed dryĪnti-seize can alter the tightening torque up to 20%, increasing risk of breakageĪnti-seize can create heat transfer and electrical conductivity concerns Using anti-seize on spark plugs installed in aluminum cylinder heads was ver common as the steel shells would seize in the aluminum It can also create heat transfer and electrical conductivity concerns. Anti-Sieze can alter the tightening torque up to 20%, increasing the risk of breakage.
The nickel coating on most modern spark plugs provided added protection from seizing in aluminum cylinder heads and has made anti-seize less important in spark plug installations. The official position of Autolite on this question is to consult the service manual for the vehicle being repaired and use anti-seize only where the original manufacturer recommends it. There is a debate whether or not to use anti-seize when installing spark plugs.
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