How often to change spark plugs

Generally, experts recommend replacing spark plugs every 30,000 miles, though the frequency may vary depending on the specific model. Always consult your vehicle manual for more relevant information. Now that you know how often to change spark plugs, continue reading to learn the importance and steps of this maintenance task from the service professionals at Sewell INEOS Grenadier.

What happens if I do not change spark plugs?

Your spark plugs are one of your ignition components that work by moving the high-voltage current from the ignition coil to ignite the combustion chamber as soon as you start your vehicle. If the spark plugs are not functioning properly, you will start to see problems on your Dallas travels, such as:

• Slow or no start
• Engine misfire
• Engine is running rough
• Rough idling
• Poor acceleration
• High fuel consumption

In addition to avoiding some of the issues listed above, other benefits can come from regularly changing your spark plugs. Find out the benefits of replacing your spark plugs as part of the preventative maintenance schedule for your vehicle:

• Improved fuel economy – Having a worn-out spark plug can reduce your fuel economy by as much as 30% and replacing it can help gain that back.
• Consistent combustion system – Spark plugs allow for the continuous production of combustion and leave the system of your vehicle running as it should be.
• Your vehicle starts smoothly – After you replace your spark plugs, you will feel your vehicle start effortlessly when you turn the key in the ignition.
• Less harmful emissions – Replacing the spark plugs in your vehicle will result in less emissions.

How to Change Spark Plugs

Replacing your worn spark plugs can easily be done with some hand tools, but you should always check your vehicle manual to get recommendations from the manufacturer. Follow what the manufacturer recommends to avoid suboptimal performance during your Fort Worth commutes or issues for other engine components.

Here are some tips on how to change spark plugs when they get worn out, including what tools you will need:

Recommended tools

• Screwdriver
• Spark plug socket
• Torque wrench
• Your vehicle manual
• A vehicle repair guide
• Engine firing diagram
• Personal protective equipment (gloves, goggles, etc.)

Steps & tips

1. Park your vehicle on a flat and dry surface, and only start working once the engine is cool.
2. Before removing anything, clean the engine area of any dirt, debris, or particles that may fall into the engine cylinder.
3. Disconnect the battery if you need to but consult your vehicle repair guide before you do so.
4. Clear away any obstructions, and remove the spark plug wire. Try to avoid damaging the rubber “boot” or tearing the wire terminal away from the plug wire end.
5. Remove the coil on plug (COP). You might need a screwdriver for this.
6. Using a spark plug socket, unscrew and remove the spark plug. You should try to avoid damaging the threads, but you may be able to restore them using a spark plug thread restorer.
7. Inspect your new spark plugs and make sure that they match your engine requirements. When you install your new spark plugs, try to avoid cross-threading, as this will damage the spark plug and cylinder thread heads. Use a torque wrench to tighten to the appropriate amount of torque.
8. Now you can re-install the spark plug wires. Connect the plug wires to the correct spark plugs for each cylinder. You can refer to a firing order diagram, if necessary. Once everything has been re-installed, you are ready to start up your engine.

Learn more about vehicle maintenance from Sewell INEOS Grenadier

You now know how often to change spark plugs. What is next? Learn about the frequency of other service tasks, like oil changes and tire rotations. If you would like our professionals to take care of this task for you, make a reservation online. We serve drivers from Plano, Frisco, and nearby areas.