How to change your spark plugs on an Evo VIII...

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Changing spark plugs on an Evolution VIII is one of the easiest things you can do to keep your motor at it’s peak. It’s also a good way to see what’s going on in there with this little guide;
http://www.machv.com/diagsparplug.html

You will need the following tools;
10mm socket,
13/16 spark plug socket
6 inch extension
the appropriate ratchet(s)
(torque wrench is optional)

1. Remove the four 10mm bolts holding down the spark plug cover. Remove the cover and set it aside.

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2. Unplug the coil packs.

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3. Grab the top of the wire boot, and with a good yank pull straight up. It will come off with a “pop.”

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4. Remove the three 10mm bolts holding down the coil pack. Again, grab the top of the boot, pull up, and remove the entire assembly in one piece. The coil pack comes out with ease and just set it aside.

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5. Remove the three 10mm bolts from the last coil pack and set that assembly aside too.

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6. Insert the spark plug socket on the 6 inch extension into the spark plug well. Seat the socket on the spark plug and remove.

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7. Drop in four fresh plugs.

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8. The last thing you want to do is cross thread spark plugs into the head. A little trick I use; with the spark plug socket and extension, unscrew the spark plug you just put in there. Yes unscrew it, go counterclockwise till you feel the threads “click,” or drop into place. That’s the right spot where the threads meet, and start screwing it in, by hand first, and the spark plug should take the threads easily. If it doesn’t screw in by hand easily, find out why before you damage any threads. You will never cross thread if you do this little back out trick first.

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9. If they are new plugs and you don’t have a torque wrench; tighten it 1/2 to 2/3 more turn after the you hit the crush washer, but this is only if it’s new. If your just reading the plugs and reinserting them; tighten to 18 (+/-4) ft lbs.

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10. Reinstall the coil packs and tighten down their bolts to 89 (± 17) in-lbs., or good and snug. Push down firm on the boots and they’ll pop into place. Replace the spark plug cover. Start the car.