Loading

How long does it take to change Subaru spark plugs?

Changing the spark plugs on a Subaru vehicle typically takes between 30 minutes to an hour, depending on the specific model and your level of mechanical expertise. The process involves accessing the spark plugs, removing the old ones, and installing new ones, which requires some basic tools and a bit of patience.


Accessing the Spark Plugs


The first step in changing Subaru spark plugs is to locate and access them. Subaru engines are known for their boxer configuration, which means the spark plugs are often tucked away in tight spaces, making them a bit more challenging to reach compared to some other vehicle designs. Depending on the model, you may need to remove various components, such as the engine cover or air intake, to gain access to the spark plugs.


Removing and Replacing the Spark Plugs


Once you have access to the spark plugs, the actual replacement process involves the following steps:



  • Use a spark plug socket and a torque wrench to carefully remove the old spark plugs.

  • Inspect the old spark plugs for any signs of wear or damage, such as cracked porcelain or worn electrodes.

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

  • Tighten the new spark plugs to the manufacturer's recommended torque specification, typically between 13-18 ft-lbs.

  • Reconnect any wiring or components that were removed to access the spark plugs.


It's important to follow the manufacturer's instructions and use the correct spark plug type and gap for your Subaru model to ensure optimal engine performance and avoid any potential issues.


Factors Affecting Spark Plug Replacement Time


The time it takes to change Subaru spark plugs can vary depending on several factors:



  • Model and engine configuration: Accessing the spark plugs on some Subaru models, such as the Outback or Ascent, may be more challenging than others, which can increase the overall replacement time.

  • Mechanical experience: Experienced mechanics or DIY enthusiasts may be able to complete the task more quickly than someone who is less familiar with the process.

  • Tool availability: Having the right tools, such as a spark plug socket and torque wrench, can make the job easier and faster.

  • Condition of the spark plugs: If the spark plugs are particularly difficult to remove due to corrosion or other issues, the replacement time may be longer.


In general, with the right tools, a bit of patience, and some mechanical know-how, most Subaru owners can expect to change their spark plugs in about 30 minutes to an hour, depending on the specific model and their level of experience.

How long does changing spark plugs take?


It will take about one hour to replace your spark plugs for a four-cylinder engine. A V6 and V8 may take longer than an hour. Changing a vehicle's spark plugs is a DIY thing, but it may sometimes get complicated.



How often should you change spark plugs on a Subaru Crosstrek?


30,000 Miles
Every 30 Months or 30,000 Miles
As your Subaru ages, we'll suggest repairs or replacements before they become a real problem. Approaching 60,000 to 100,000 miles, we'll also replace the radiator coolant and the transmission fluid, as well as the spark plugs.



Is it easy to replace Subaru spark plugs?


Replacing spark plugs is something you can do at home within an hour as long as you have the following tools: Appropriately sized spark plug socket. 8-10mm sockets. Ratchet and extensions.



How much does it cost to replace spark plugs in a 2019 Subaru Crosstrek?


$332 - $391. “Dealer” refers to service centers that specialize in one or two makes and sell those vehicles.



How long does it take to change spark plugs on a Subaru?


Replacing spark plugs is something you can do at home within an hour as long as you have the following tools: Appropriately sized spark plug socket. 8-10mm sockets. Ratchet and extensions.



What is the labor to change spark plugs?


Typically, the labor costs for a spark plug replacement are about $129 to $163. But whether it's a good idea depends on your comfort level for DIY automotive projects and the type of car you have. On some models, spark plugs are easy to reach, but on other vehicles, they're more difficult to access.



When to replace spark plugs on a Subaru Ascent?


At 60,000 Miles

  1. Recurring 6,000-mile Subaru Ascent service interval.
  2. Spark plug replacement.



How much does it cost to replace spark plugs in a Subaru Ascent?


$364 - $428. “Dealer” refers to service centers that specialize in one or two makes and sell those vehicles. As a franchise dealer: They use top-quality manufacturer-recommended or “official” parts.



Can I drive with bad spark plugs?


Ideally, you should replace them immediately. However, you can get by for a short while, as long as they aren't misfiring. Poor spark keeps fuel from being burned inside the combustion chamber. This reduces power and fuel economy, and it makes it harder for the engine to idle.



How do I know if my Subaru spark plugs are bad?


One of the first signs of spark plug wear is trouble starting your Subaru. If the engine cranks longer than usual before starting or if you experience intermittent starting issues, it's time to inspect your spark plugs.


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.