The Essentials of Replacing and Gapping Spark Plugs

Replacing spark plugs is one of the primary tasks during a tune-up, and proper maintenance can keep your vehicle's electrical system running smoothly and efficiently. With the right equipment, you can change, clean, and gap spark plugs yourself.

How to Buy the Right Spark Plugs

To buy the proper spark plugs for your vehicle, you must know its specifications. Your owner’s manual may have specifications for buying and gapping the spark plugs on your vehicle. If you don’t have an [more…]

How to Remove Old Spark Plugs

The first step in changing your spark plugs is to remove the old ones. To avoid turning this job into an all-weekend project, remove one spark plug at a time, inspect it, clean it, and — if it’s salvageable [more…]

How to Remove Hard-to-Reach Spark Plugs

When changing your spark plugs, you may have some difficulty loosening a spark plug for the first time. Grease, sludge, and other junk may have caused the plug to stick in place, especially if it’s been [more…]

How to Install a Spark Plug

When you're changing your vehicle's spark plugs, work on one spark plug at a time: Remove it, inspect it, clean it, and — if it’s salvageable — gap it. Then replace it before you move on to the next spark [more…]

How to Gap Your Spark Plugs

The gap between the center and side electrodes of a spark plug must be an exact distance; otherwise, your plugs don’t fire efficiently. Adjusting the distance between the two electrodes is called [more…]

How to Assess Trouble by Checking Your Spark Plugs

You can actually read your spark plugs for valuable “clues” about how your engine is operating. If your plugs indicate that something is seriously wrong with your engine, ask a professional for an opinion [more…]

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