How-To: Replace Spark Plugs - - Home of the Lancer Evolution

Go Back > Lancer Forums > Lancer (DE,ES,GTS) 2008+ Forums > Lancer How Tos / Installations
Log In 

Lancer How Tos / Installations Post or link to your detailed how to / installation articles in here. If you have any questions regarding the how tos, feel free to post them in in the Request sub-forum.

How-To: Replace Spark Plugs

Thread Tools Search this Thread
Old Dec 3, 2010, 06:31 PM   #1
Evolved Member
Personal Sales Rating: (1)
nj_08_gts's Avatar
Join Date: Jul 2007
Location: Southern New Jersey
Posts: 802

Drives: 2013 Mazda CX-5 Grand Touring

Lightbulb How-To: Replace Spark Plugs

Replacing spark plugs is a quick and easy task. Looking closely at the old plugs can also be a great indicator of what's going on inside your motor.

Step 1: Gather your tools and new plugs
  • Denso OEM Iridium Spark Plugs (Denso Part# K20PSR-B8; Part # MN163807)
  • Spark plug or 5/8" socket & 10mm socket
  • Socket Extension
  • Anti-Seize Compound
  • Torque Wrench (ideal) and/or regular socket wrench
  • Canned Air
  • 20 - 30 minutes of your time
Click the image to open in full size.

Step 2: Pop the hood and remove the spark plug cover to expose the ignition coils:

To remove the cover you could use either a Philips-head screw driver or a 10mm socket. Once the cover is off, use canned air or some shop towels to remove excess debris from around the ignition coils.
Click the image to open in full size.

Step 3: Remove the ignition coils:
It's best to change the plugs one at a time so that you don't get the ignition wires confused and screw up the firing order. So pick a coil and use the 10mm socket to remove it. As you're pulling it out, you'll hear a suction cup sounding "pop". Gently unplug the coil wire harness, remove the ignition coil and set it aside in a clean place.
Click the image to open in full size.

Step 4: Out with the old
Use your socket wrench and extension and remove the old may put up a little fight. If you have a spark plug socket, you can simply pull the old plug straight out. If you just have a standard socket, loosen the plug as much as you can and use a length of 1/4" fuel hose to reach down and grab the end of the plug to get it out.
Click the image to open in full size.

Step 5: In with the new
NOTE: It is not necessary (or even recommended) to change the gap of Iridium spark plugs since the tip can be damaged quite easily.
Put a very small amount of anti-seize on the threads of the new plug and begin to screw it back in and tighten it to 18 ft./lbs. DO NOT OVER TIGHTEN THE PLUG! Replace the ignition coil & wire harness and screw it back in (gently since it's plastic) and move on to the next plug. .

Step 6: Clean up
Put your spark plug cover back on and make sure you don't leave any tools under the hood! That's're done! Here's a reference chart you can use to check the condition of your used plugs:
"Speed has never killed anyone - suddenly becoming stationary, that's what gets you."
- Jeremy Clarkson
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
All you need to know: SPARK PLUGS! gregivq Lancer Engine Tech 41 Aug 9, 2014 09:26 AM
DIY 30K mile service Mark Hubley Lancer How Tos / Installations 16 Feb 24, 2014 07:22 PM
How to disable / disconnect / remove the 5k rev limiter Jakeg97 Evo Engine / Turbo / Drivetrain 28 Jun 13, 2010 07:16 AM
2005 Honda Civic LX nj_08_gts Paint and Detailing 2 May 15, 2009 05:34 PM
HOW TO: Buschur Racing catch can. sabastian458 Evo How Tos / Installations 1 Dec 11, 2008 01:31 PM

08, 09, 2008, change, evolutionm, fast, gts, k20psrb8, lancer, mitsubishi, plugs, replace, replacing, spark, specs, torque

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


All times are GMT -7. The time now is 01:43 AM.