GM 12681665 Spark Plug Assembly, Gas Eng Ign

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Use compressed air or a bicycle pump to blow any dirt away from the spark plug hole.

It's important to label each spark plug wire to ensure correct installation of the wires on the new spark plugs.

You will need tools such as a spark plug socket with a padded interior, various extensions, a gap gauge, and a torque wrench.

Attach the wire using a twisting motion until it's seated on the plug.

Before installing new spark plugs, apply a thin layer of anti-seize compound to the threads. This helps prevent the plugs from seizing in the future.

Attach the plug wire to the new spark plug using a twisting motion on the boot. Repeat this process for the remaining spark plugs one at a time to avoid confusion with the wires.

To replace the spark plugs, you'll need a spark plug socket, various extensions, a gap gauge, a plug wire removal tool, and a torque wrench.

Use compressed air or a bicycle pump to blow any dirt away from the spark plug hole.

To replace the spark plugs, assess their accessibility, especially if the car has air-conditioning or power steering, as special tools like extension or swivel tools may be necessary. Gather the required tools, including a plug wrench or spark plug socket, a feeler gauge for gap adjustment, and, for cars with HEI ignition, a spark plug wire removal tool. Before starting, obtain the correct spark plugs for your engine by referencing the Specifications section, the tune-up decal under the hood, or the owner's manual; prioritize the information from the tune-up decal if discrepancies exist. Ensure the engine cools down, inspect and adjust the gap on each new spark plug, and check for defects. Protect the car's exterior paint with fender covers. After allowing the engine to cool, remove a spark plug wire carefully, preferably with a removal tool, and use compressed air or a bicycle pump to clear debris from the spark plug area. Then, use a spark plug wrench or socket to remove the plug counterclockwise, and compare it for engine condition insight. Install a new plug by hand, ensuring it threads easily, and then firmly tighten it with a torque wrench. Inspect the spark plug wire before attaching it to the new plug, using a twisting motion, and route it away from the hot exhaust manifold. Repeat these steps for the remaining spark plugs, replacing them one at a time to prevent wire mix-up.

The spark plugs on 3.4L V6 engines are located in the valleys between the camshafts, with three on each cylinder head.