How to change spark plugs Hyundai Kia Four Cylinder Engine

Published by YOUCANIC Automotive Experts 
Last Updated Dec 19, 2018 

In this tutorial, you will learn how to change spark plugs on Hyundai four-cylinder engine known as 2.0T & 2.4 L engine. This is also known as the Theta II engine and is used on many models such as Hyundai Sonata, Genesis, ix35, Santa Fe, Tucson. 

What you will need

  1. Hyundai OEM Spark Plugs
  2. Spark Plug Socket
  3. 3/8 Extension and Ratchet


Prepare area

Clean the area around near the spark plugs and around the ignition coils. Remove any dirt near the spark plugs in order to avoid it from falling into the cylinders latter. 

Remove ignition coil

Use a 10 mm socket to loosen the bolt that secures the coil in place. The Theta II Kia/Hyundai engine uses coil-on-plug design. Unplug the ignition coil connector by pressing the locking tab and then pulling the connector away. Once the bolt and connector have been removed pull the ignition coil up. If the ignition coil refuses to come up try twisting it slightly then try lifting it up and out. 

Remove spark plug

Blow dirt away from the spark plug recess before you remove the spark plugs. Use a 16-mm spark plug removal tool, ratchet and a 3/8" extension to remove the spark plugs from the engine. Rotate counterclockwise to remove the spark plugs. You may need to use a magnet tool to pull out the spark plug. 

Install new spark plug

It is time to install the new spark plug. It is a good idea to check or at least inspect the gap using a spark plug gapping tool. Certain spark plugs may come pre-gapped while certain plugs should not be gapped. It is recommended to use anti-seize lubricant on the spark plug threads. Install the new spark plugs by hand and then tighten using your ratchet. Do not over tighten the spark plugs or you may strip the threads. If you have a torque wrench handy tighten to spec. Check out the torque specs below. 

To change spark plugs Hyundai 4-cylinder engine you will need one to two hours. Replacing the spark plugs yourself can save you money. 

Torque Specifications

  • Ignition Coil Bolts: 3.9 ~ 5.9N.m (0.4 ~ 0.6kgf.m, 2.9 ~ 4.3lb-ft)
  • Spark Plugs: 11- 15 lb-ft (Verify by calling your dealer)

We hope that you would this guide on how to change spark plugs Hyundai Kia engine useful. Please use the comments section to provide feedback or just leave a comment. 

Hyundai Spark Plugs Replacement Cost

Replacing spark plugs on the Hyundai vehicles listed here will cost you in average less than $30 assuming you already have the tools. If a mechanic at your local repair shop changes your spark plugs expect to pay between $150 to $250.  

Theta/Theta-II Engine - 2.0L (1998cc)

(G4KA, G4KD, G4KF, G4KH,)

2011 Hyundai Sonata Limited 2.0T, turbo GDI engine

  • Hyundai Genesis Coupe Port Injected 2.0 Turbocharged (2010-)
  • Hyundai Sonata GDI 2.0 Turbocharged (2011-)
  • Kia Rondo (2007-)
  • Kia Forte 2.0 (2009-2013)
  • Kia Optima GDI 2.0 Turbocharged (2011-)
  • Kia Sportage GDI 2.0 Turbocharged (2011-)
  • Kia Sorento GDI 2.0 Turbocharged (2016-)
  • Hyundai ix35 MPI 2.0 (2010-)
  • Hyundai Santa Fe (Sport Models) GDI 2.0 Turbocharged (2013-)

Theta/Theta-II Engine - 2.4L 

(G4KC, G4KE, G4KG, G4KJ,)

  • Hyundai Sonata (2006?2010)
  • Hyundai Sonata GDI (2011-)
  • Hyundai Sonata (2011-) (Middle East)
  • Hyundai Tucson (2010-)
  • Hyundai Santa Fe (2010-)
  • Kia Optima (2006?2010)
  • Kia Optima GDI (2011-)
  • Kia Rondo (2007-)
  • Kia Cadenza GDI (2011-)
  • Kia Sportage (2011-)
  • Kia Sorento (2011-)
  • Kia Forte (2010-2013)