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Coil and Spark plug replacement 2001 Volvo S40

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Step 5:

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The spark plug socket has a rubber insert to hold the plug in place while you remove the plug.  Place the socket on the extension and press it down into the well, and use the ratchet to loosen the spark plug. Once it is completely loosened, pull the socket out of the well. You may need to use the pliers to extract the socket - mine never stays on the extension.  Insert a new plug it into the spark plug socket, and screw it into the hole at the bottom of the well.  Turn it until it is finger tight, then use the ratchet to tighten the plug one-quarter to three-quarter turn more.  Repeat for all four plugs.

Insert the new coils into the far right wells, making sure to align the hole for the securing bolt. use the 10mm socket to secure the coil hold bolt.  Attach the control wires making sure they are secured with the clip.

Install the plug wires into the left wells. Make sure the wire labeled "1" is on the far left (as you face the car - this is the passenger side of a Left-Hand Drive model). Route the wires as seen in the photo - wire "1" is attached to the coil on the other end of the engine, which is cylinder #4. Of course this means that the #2 wire is connected to the closer coil, over cylinder #3.
 
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