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What size socket for spark plugs on a 2011 Subaru Impreza?

The recommended spark plug socket size for a 2011 Subaru Impreza is a 16mm socket. This size is commonly used for the spark plugs in Subaru vehicles of this model year and engine configuration.


Detailed Explanation


The 2011 Subaru Impreza is equipped with a 2.5-liter, 4-cylinder boxer engine. This engine type typically uses spark plugs with a 16mm thread size. The 16mm socket is the appropriate tool for removing and installing these spark plugs during routine maintenance or replacement.


Using the correct socket size is important to avoid damage to the spark plug or the cylinder head. A socket that is too small may strip the plug, while a socket that is too large may not fit properly and could round out the plug's hex head.


Tips for Changing Spark Plugs



  • Ensure you have a high-quality 16mm spark plug socket, preferably with a deep well design for better access.

  • Apply a small amount of anti-seize compound to the threads of the new spark plugs before installation.

  • Torque the spark plugs to the manufacturer's recommended specification, typically around 13-18 ft-lbs.

  • Replace all spark plugs at the same time for best results, even if only one appears worn.

  • Consult your owner's manual or a repair guide for the specific procedures and specifications for your 2011 Subaru Impreza.


Following these tips and using the correct 16mm spark plug socket will help ensure a successful spark plug replacement on your 2011 Subaru Impreza.

What size socket is an NGK spark plug?


It's good practice to confirm your spark plug socket size by checking your owner's manual. Note that the socket size for NGK spark plugs, which are a common brand, is either 5/8 or 13/16.



How to remove a Subaru spark plug?


Start by inserting your spark plug socket in the plug tube by itself, then follow it with a three inch ratchet extension. This should allow you to get your ratchet on and break the plug loose. At this point you can back the plug out with the ratchet, or take the ratchet off and turn the extension with your fingers.



Is there a special socket to remove spark plugs?


Though you can technically use any socket of the right size, we recommend using the kind specifically made to pair with spark plugs. These special sockets contain rubber isolators inside intended to absorb any possible vibration within and protect the glass featured along the spark plug.



What size spark plug socket for Subaru Impreza?


14mm Spark plug socket and a 3" extension will get the job done. Also, don't over torque the plugs. A socket with the 3" extension positions perfectly to be able to get a torque wrench on them.



What size socket is NGK spark plugs?


It's good practice to confirm your spark plug socket size by checking your owner's manual. Note that the socket size for NGK spark plugs, which are a common brand, is either 5/8 or 13/16.



What tools do you need for spark plugs?


The Tools Needed to Change Spark Plugs

  • Spark plug swivel socket with extension.
  • Flexible handle ratchet.
  • Spark plug boot puller pliers.
  • Spark plug gap gauge.
  • Torque wrench.
  • Wire loom spacers.
  • Anti-seize.
  • Spark plug boot grease.



Does a Subaru Impreza have spark plugs?


Off. And just use it because once it's cracked it's still just fingertight. So it's easy to get them out. And that's the other side coils out and you can see the two holes down there for.



What is the spark plug gap on a 2011 Subaru Impreza?


The manual calls for a 0.039" to 0.043" spark gap.



What size socket is needed for spark plugs?


16mm
What size socket do I need to change out spark plugs? For the majority of plugs, you need a 5/8” or 16mm socket. Some Fords use 9/16″ plugs, some newer European and Asian vehicles use 14mm plugs, and there are a few applications that use 7/8″, 13/16″, ¾” or 18mm plugs.



What tool do you need to remove a spark plug?


A spark plug socket
To remove spark plugs, you need a spark plug removal tool that grabs and twists the spark plugs inside your vehicle's engine. Because spark plugs can be in awkward positions, you may also need an extension for your spark plug socket.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.