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How do i change spark plugs on 1999 saturn sl1

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The plugs are connected to the 4 plug wires you see on the front of the engine when you raise the hood. You need a deep socket, or a spark plug socket, to get over the plugs down in the depressions. Go to Walmart or Kmart and get 4 plugs, they have a book or a little computer which you can use to find which plug fits your car. Or you can go to a car parts store and they will find them for you and make sure the gap is right. If you have access to an air compressor pull off the plug wire and blow pressurized air down around the plug to avoid having dirt fall into the hole after the plug is removed. Then unscrew the plug and replace it with a new one properly gapped. Do them one by one so you do not mix the wires up. If the plug wires have never been replaced you may want to do that too, they pull off the coil the same way they pull off the plugs. Do them one by one as well so as to avoid mixing them up.

Posted on Sep 07, 2010


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