I have searched, but no how to. Even though this is change is really simple, I have seen posts asking how to do it. So here it is. Be sure to read though before starting, to make sure you have all the necessary tools to complete it.

notes
- spark plug gap should be close to .028
- when tightening the spark plug use a torque of 25 Nm or 18 ft-lb
now i just retighten the new plugs to about the same feel as the old ones, because i didnt have a torque wrench. i have had not had any problems
- a spark plug socket would be nice and easy, but not necessary

Step 1:
disconnect battery using a 10mm wrench or socket. -always a good idea to remove power while working on the engine. plus once you are done, reconnecting the battery will reset the ecu. w/ fresh plugs in.





Step 2:
remove engine plug cover. use a phillips head screwdriver or a 10mm socket








Step 3:
remove spark plug wires and unplug wire harness - use a 10mm socket to remove the 3 screws on the plug
note: the plug wires are set in good. meaning its gonna take some effort / pull to get the wires out. dont be afraid - yank on them








after plug wire removal you can see the spark plugs set deep in the engine block





Step 4:
you will need a deep set socket with extension to reach the spark plug in its location. i used size 13/16 deep well socket to reach and unscrew the plug.





then i used this to remove the plug- not sure what the proper name of this device is, or a slang term, but works like a charm







Step 5:
replace your old spark plugs with new ones
as you can see , mine were pretty fouled with only 3500 miles on the car. i have read that its recommended to replace your spark plugs every 6 months if you run your car hard. i used the cheap, but effective NGK BPR7ES as easy replacement







Step 6:
put everything back together, reconnect battery and feel the difference. it amazes me the simple changes that you can do to this vehicle to see or feel it running better.

 

i cant beleive that your plugs looked that bad after 3500 miles. i have 10k and i am gonna change mine this weekend. thanks for the great how to. good description, and great pictures.

 

Holy rich condition batman!! You need some fuel tuning brotha. There is no way plugs should look like that after 3500 miles.

And changing plugs every 6 months is just crazy, my car has 40k modded miles and my stock plugs still look new.

 

The spark plugs on my old ford explorer didn't look that bad after I put 40k miles on it, and plus however many miles the previous owner put on them.

 

wow, new plugs at 3k?

stock are Iridium and suppose to last a lot longer.

any noticable gains w/ NGK coppertips? gapping require?

 

sorry posted wrong pic - those were the plugs after 200 miles of ses light safe mode

 

other pictures of the condition of my spark plugs - before the change
https://www.evolutionm.net/forums/sh...d.php?t=115144

 

this pic is with the engine running in safe mode for 200 miles. rich is right , i was getting 5 mpg!

 

Is anti-sieze compound on the plug threads not recommended on the evo?

 

i read that its ok to use , but i have not. i might try it next time when i replace the plugs, but that will depend on how hard it is to remove the used ones.

 

Discuss thread HERE!