Introduction

Replacing the spark plugs in your Malibu can keep it running strong. New spark plugs will produce a stronger spark than older spark plugs allowing your engine to run smoother and more efficient.

  1. Use the 1/2" socket to loosen and remove the four bolts and washers on the spark plug cover labeled 2.4L Twin Cam.
    • Use the 1/2" socket to loosen and remove the four bolts and washers on the spark plug cover labeled 2.4L Twin Cam.

      • These four bolts should be torqued to 18 ft-lbs when putting the spark plug cover back on.

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  2. With a flathead screwdriver remove the ignition coil electrical connector on the right side of spark plug cover.
    • With a flathead screwdriver remove the ignition coil electrical connector on the right side of spark plug cover.

    • Be careful while disconnecting the ignition coil electrical connector as it may break.

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    • Remove the spark plug cover.

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    • When working with compressed air, wear safety glasses to protect your eyes from flying debris.

    • Use compressed air to clear any debris from the area around the spark plugs.

      • Any particles that fall into the cylinder could cause serious engine damage.

    • Use a 5/8" spark plug socket with an extension to loosen and remove the spark plugs.

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    • Before installing the new spark plugs check that the spark plugs' gap is between 0.048 and 0.052 inches.

    • If it needs to be widened, use a gap setter to increase the size of the gap until it reaches the desired width.

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    • Wedge the new spark plugs into a 5/8'' spark plug socket.

    • Place the spark plug into the cylinder using the socket and hand tighten the spark plugs as much as possible.

    • Tighten the spark plugs to 13 ft-lbs with a torque wrench.

    • Do not over tighten spark plugs. This could strip out the threaded holes in the head.

    You mention all but the plug size or Pat number

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Conclusion

To reassemble your device, follow Steps 1-3 in reverse order.

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Sank Yang

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Cal Poly, Team 9-15, Amido Fall 2012 Member of Cal Poly, Team 9-15, Amido Fall 2012

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