Mazda 6 : Replacing spark plugs

First of all, disclaimer:

I’m not responsible for any damage you may cause to your car or, even worse, to yourself using instructions provided bellow. I’m not a professional mechanic and whatnot, so use these instructions at your own risk. Read entire post first and be sure you understand everything before you start it. If you’re in doubt – seek professional help.

Stuff you’ll need:

• Spark plugs – Mazda 6i 2008 has ILTRA5-13G spark plugs – NGK Laser Iridium 3811 is a good replacement
• Spark plug socket
• Anti-seize lubricant
• Dielectric grease
• Torque wrench (optional, but highly recommended)
• 3/8 ratchet key and extension
• 8mm, 15mm keys

Let’s begin.

• Disconnect battery’s negative terminal
• Remove plastic cover from engine

• Cleanup the area around ignition coils thoroughly, use whatever necessary (vacuum, toothbrush, etc) to make it clean, you don’t want any debris around when you remove your spark plugs.

• Use 15 mm key to remove those little plastic thing that holds engine cover.

• Disconnect coils wires.
• Unscrew bolts that hold ignition coils
• Remove coils

• Now, take spark plug socket and remove a spark plug (I’d recommend doing one spark plug at a time)

• Take new spark plug, put it in the socket
• Apply small amount of anti-seize lube
• And screw it back in place

Use torque wrench and tighten up spark plug to 8-17 ft-lb

last one….

• Its time to reinstall ignition coils, but before you do, put small amount of dielectric grease in it.

• All coils are in place

• Put engine cover back in place and reconnect battery.
• And, you’re done!

Before you throw away your old spark plugs inspect them for any signs of oil or white residue.

Don’t forget to setup your clock, radio, and power windows as those were reset when you disconnected the battery.