Question about 2005 Chevrolet Cavalier

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Location of spark plugs on a 2005 cavalier?

I decided to save some money and change the spark plugs myself. Well I feel stupid, but I can not find them, Help please?

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You have to remove the black piece in the center on top of the engine. This is your coil pack. Unbolt and disconnect it, pull it up. Underneath the coil pack you'll see 4 spark plug boots that extend from it, down into the head. It's best to have a spark plug socket with a long extension but do your initial install of the plugs by starting the plugs on the end of a piece of tubing or fuel line. Do not drop anything in the plug holes! Easy to do because they are facing up.

Posted on Apr 14, 2009

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Since the car has an aluminum block, change the plugs when the engine is cold, not hot. After you have removed the bolts holding down the black coil pack, lift the pack up and away from the valve cover. You will have to loosen the bracket that holds the accelerator cable to get clearance, or you can simply bend it out of the way (not recommended). Get some canned air or an air hose and blow air into the holes where the spark plugs reside. This will dislodge any foreign objects that might have collected inside that could fall in the engine when you remove the plug. Use a small spark plug socket with a long extension and ratchet to remove the plug. It will take quite a bit of turning before it comes out. Since newer plugs are idirium rather than platinum, the stock # will be different. Check with the manufacturer for equivalent, in this case AC-Delco. Also compare the old plug physically with the new one to ensure it is the same length. Use anti-seize compound on the new sparkplug threads to reduce the possibility of cross-threading and/or damaging the threads. I do not recommend using copper core plugs, they last about 10,000 miles and then you will have engine problems. Platinum and Iridium will last 100,000 miles before needing replacement. Remember that these plugs are pregapped but its always a good idea to double check with a round gapping tool first. If you have a plug way out of gap, its best to return it for replacement, because a standard plug gapper will damage the tip of a platinum/iridium plug and make it useless. Replace each plug one at a time, and use a torque wrench to torque the plug to factory specification which can be found in your user manual. Then push the ignition pack back into place making sure the rubber boots seat properly on the plugs, reinstall fixing bolts and move bracket back into place. Start engine and take it around the block to warm it up and check for engine miss or roughness. If you did everything right it should run great.

Posted on Oct 07, 2009


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