Use the correct deep socket size to loosen each spark plug one or two turns.CAUTION: Use goggles to protect eyes from debris when applying compressed air to spark plug wells. Brush or air blast dirt away from the well areas before removing spark plugs.DO NOT grab or violently pull spark plug cables. If necessary, use a spark plug boot removing tool. Pull the spark plug boot and cable away from the spark plug. Grasp the spark plug boot and gently rotate it 90 degrees counterclockwise.Replace your dirty, fouled spark plugs with new ACDelco spark plugs. These conditions severely affect spark plug performance. Dirty, fouled spark plugs may also have broken or chipped insulator tips, worn electrodes, or worn or missing side wires. No, cleaning your old spark plugs is not recommended. Causes of pre-ignition include but are not limited to a buildup of deposits that can become incandescent in the combustion chamber, improper installation torque being applied to spark plugs, and having spark plugs with a heat range that is too hot for the engine’s operating condition.Ĭan I just clean my spark plugs instead of replacing them? Pre-ignition is the ignition of fuel before the actual spark occurs, which causes a rapid temperature rise in the combustion chamber that can damage engine components and melt spark plug electrodes. Yes, pre-ignition can cause serious damage to your engine. What is pre-ignition and can it damage my engine? Refer to your vehicle owner’s manual or contact the manufacturer for more information. Not always, but you should inspect your spark plug wires for wear when replacing your spark plugs. When I replace my spark plugs, should I also replace my spark plug wires? When ACDelco spark plugs are manufactured, they are pre-gapped to the correct gap specification. Refer to your owner’s manual or contact your vehicle’s manufacturer for more information. Our Glow Plugs are specially designed to give diesel engines the heat they need for their cold starts. Diesel engines require glow plugs because diesel engines operate differently than gas engines. It is okay to replace one spark plug if it is fouled or damaged prior to scheduled maintenance, provided the source of the damage is found and corrected.ĭoes a diesel engine require a different type of plug than a gas engine? Yes, if it is the scheduled time for spark plug replacement. Should I change all of my vehicle’s spark plugs at the same time? Yes, this interval depends on what type of spark plug your vehicle requires. Is there a recommended interval for changing my vehicle’s spark plugs?
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