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Lancer Spark plugs Install Guide

Your Lancer

Pick your year to see what fits.

Restores lost power
Medium$15–$9030–60 min
All Lancer mods

Why do it

Worn plugs cost power and throttle response.

Tools you'll need

Starting out? See our budget tool list.

Parts to buy

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Before you start

  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.

Steps

  1. Remove the cover

    • Take off the 10mm cover.
    Watch this step (on a Lancer 2.0L) (0:27–0:53)

  2. Remove the coils

    • Unplug and unbolt them.
    Watch this step (0:53–1:45)

  3. Swap the plugs

    • Thread new plugs by hand first.
    Watch this step (1:45–2:36)

  4. Refit

    • Refit coils and cover.
    Watch this step (2:36–3:29)

  5. Remove the cover

    • Take off the cover.
    Watch this step (on a 4G Eclipse, same 2.4L) (1:08–1:48)

  6. Remove the coils

    • Unplug and unbolt them.
    Watch this step (1:48–2:51)

  7. Remove the plugs

    • Use a 5/8 socket.
    Watch this step (2:51–3:55)

  8. Fit and torque

    • Torque to 18 ft-lbs.
    Watch this step (4:57–6:21)

  9. Refit

    • Refit the coils and cover.
    Watch this step (6:21–7:23)

  10. Remove the cover

    • Take off the engine cover.
    Watch this step (on a 2008-2017 Lancer) (0:13–0:48)

  11. Remove the coils

    • Unplug and pull the coils.
    Watch this step (0:48–1:43)

  12. Remove the old plugs

    • Take them out.
    Watch this step (1:43–2:38)

  13. Fit the new plugs

    • Fit and torque them.
    Watch this step (2:38–3:43)

  14. Remove the cover

    • Take off the engine cover.
    Watch this step (on a 2008-2017 Lancer 2.4L) (0:13–0:48)

  15. Remove the coils

    • Unplug and pull the coils.
    Watch this step (0:48–1:43)

  16. Remove the old plugs

    • Take them out.
    Watch this step (1:43–2:38)

  17. Fit the new plugs

    • Fit and torque them.
    Watch this step (2:38–3:43)

  18. Remove the cover

    • Take off the engine cover.
    Watch this step (on an Evo 8) (0:35–1:06)

  19. Disconnect the coils

    • Unplug them.
    Watch this step (1:06–2:36)

  20. Remove the coils

    • Pull them out.
    Watch this step (2:36–3:44)

  21. Swap the plugs

    • Fit and torque the new plugs.
    Watch this step (3:44–4:23)

  22. Reassemble

    • Put it back together.
    Watch this step (4:23–5:35)

  23. Remove the cover

    • Take off the engine cover.
    Watch this step (on an Evo X) (0:33–1:16)

  24. Disconnect the coils

    • Unplug the wiring.
    Watch this step (1:16–1:49)

  25. Remove the plugs

    • Use a 5/8 plug socket.
    Watch this step (1:49–2:35)

  26. Check the gap

    • Check the new plugs.
    Watch this step (2:35–3:29)

  27. Fit the plugs

    • Fit and torque them.
    Watch this step (3:29–4:30)

  28. Remove the plugs

    • Pull the coils and take out the plugs.
    Watch this step (on a Ralliart) (4:37–6:16)

  29. Fit the new plugs

    • Check them and start by hand.
    Watch this step (6:16–7:49)

  30. Torque and refit

    • Tighten them and refit the coils.
    Watch this step (7:49–8:49)

How to know it worked

Did this guide work for you?

Safety first

  • Park on flat ground, set the parking brake and chock the wheels.
  • Never get under a car held up only by a jack. Use jack stands.
  • Let the engine and exhaust cool first.
  • Disconnect the battery before unplugging electrical parts.
  • Wear safety glasses.
  • If something doesn't match your car, stop and ask a shop.

Follow your part's instructions and your service manual's torque specs.

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