How to Change a Nissan Frontier's Spark Plug Wires

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    • 1). Open the hood of your Nissan Frontier and remove the negative battery cable from the battery. Loosen the retaining bolt on the battery cable clamp and remove the clamp from the battery terminal. Isolate it from the terminal while you are working.

    • 2). Locate the spark plug wires on the engine in your Nissan. Do not remove them yet. Start by selecting one spark plug wire from the group.

    • 3). Grasp the spark plug wire at the boot on the spark plug end. Twist the boot back and forth while pulling out on the boot. Do not grasp the wire; doing so will cause it to pull out of the boot and leave the metal contact behind.

    • 4). Follow the wire up its length to the opposite end at the distributor. Using the same twisting motion you used on the spark plug end of the wire, pull the wire off the distributor cap by the boot.

    • 5). Lay out the new wires and match the wire you took off to one from the new set that has the same length. Install the new one on the engine, first placing a small amount of dielectric grease in each boot, then sliding the boot on the distributor cap end first. Route the new wire along the same path the old wired used, down to the spark plug. Slide the boot onto the plug, pushing it in until it snaps onto the plug.

    • 6). Move to the next wire on the engine and repeat the process, matching the pulled wire with one from the set of new wires that is the same length. Continue this way until you have replaced all the spark plug wires with new ones.

    • 7). Install the negative battery cable end on the negative battery terminal and tighten the retaining bolt with a wrench. Start the engine to ensure it is running properly. Close the hood of the truck.

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