How to install spark plug boot
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Once you get it in securely by hand, use a torque wrench to torque precisely as indicated by your owner’s manual. Start each plug into the engine by hand to avoid cross-threading at all costs. Also, throw a dab of dielectric grease at the end of the plug wires. The decision mostly comes down to the manufacturer and type of spark plug, so consult with your local NAPA AUTOPARTS store before dabbing it on. There is much debate as to the use of anti-seize coating on spark plug threads. Most plugs these days come pre-gapped, but you’ll want to check to make sure the gap is correct with a gauge (carefully, especially if it’s iridium) and that there is no preexisting damage. Any of these indicate a bigger problem you’ll want to figure out ASAP.
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Look for excessive carbon buildup, oil, unburned fuel, or damage to diagnose unseen engine problems. This will save you the frustration of having to figure out where each wire goes later. If you have to remove anything such as vacuum hoses, coils, or other components that might easily get confused, make sure you label before disconnecting so they can be easily reinstalled. You might also take a bit of carb cleaner just for a really nice work area that isn’t going to drop grime in if you bump it while working. The goal is to keep dirt from falling into the combustion chambers when the plugs are out. Keep It Cleanīefore removing any plugs, take a vacuum and remove any dirt or debris in the area around the spark plug. Keep Your CoolĪlways let your engine cool down completely before starting work or be prepared to get burned. Also, though it is tempting to use a regular socket to remove plugs, a specialized spark plug socket (of the correct size) is the way to go because it has an interior rubber component to protect the delicate ceramic housing. This includes a few specialty tools such as a spark plug puller that will make your life easier. Get all your tools together so you don’t have to search for them in the middle of the job. With the right know-how and a few tricks up your sleeve, changing spark plugs is a simple job with big payoffs in fuel economy and performance. Luckily, it’s a pretty straightforward DIY that requires close attention, but not many tools. Old and failing spark plugs can cause a host of problems in your engine, and it should be expected that you’ll have to change them at least a few times during the life of a vehicle.