Spark plugs are crucial for your engine’s smooth operation. They generate the spark that ignites the air-fuel mixture, powering your vehicle. Dirty or worn spark plugs can lead to misfires, increased fuel consumption, and even engine damage. Regular inspection and cleaning of spark plugs are therefore essential. A common internet tip suggests using WD-40 to clean spark plugs. But is WD-40 truly a miracle solution for spark plug cleaning, or just a persistent myth?
What Exactly is WD-40 and What is it Used For?
WD-40 is a multi-purpose spray originally developed to displace water and prevent corrosion. Its name stands for “Water Displacement, 40th Formula.” Over time, WD-40 has become a versatile all-rounder, finding applications in many areas, from household cleaning to car repairs.
WD-40’s versatile formula consists of various oils, solvents, and other ingredients that together form a protective layer and can loosen rust. It is frequently used for lubricating moving parts, removing adhesives, and loosening stuck screws.
WD-40 can on a dirty spark plug
Can You Clean Spark Plugs with WD-40?
While WD-40 is excellent for cleaning and protecting metal surfaces, it is not suitable for cleaning spark plugs. The oils in WD-40 can leave deposits on the spark plug electrodes and impair the conductivity of the spark. This can lead to misfires and rough engine running.
“WD-40 is not a suitable cleaning agent for spark plugs,” says Dr. Hans Müller, automotive expert and author of the book “The Right Spark Plug for Your Car.” “The oils in WD-40 can negatively affect the ignition capability of the plug.”
How to Clean Spark Plugs Correctly?
The best way to clean spark plugs is to use a wire brush and brake cleaner. Here’s how to do it:
- Remove spark plugs: Remove the spark plugs using a spark plug wrench.
- Remove coarse dirt: Remove coarse dirt with a wire brush.
- Spray with brake cleaner: Spray the spark plugs with brake cleaner and let it sit for a few minutes.
- Blow out with compressed air: Thoroughly blow out the spark plugs with compressed air.
- Check electrode gap: Check the electrode gap with a feeler gauge and adjust if necessary.
- Install spark plugs: Reinstall the spark plugs and tighten them to the specified torque.
Cleaning a spark plug with a wire brush
What Alternatives Are There for Cleaning Spark Plugs?
In addition to cleaning with a wire brush and brake cleaner, there are also special spark plug cleaning devices. These devices work with sandblasting or ultrasound and remove even stubborn deposits from the spark plugs.
Conclusion
WD-40 is a versatile product, but not suitable for cleaning spark plugs. Using WD-40 can impair the ignition capability of the plugs and lead to engine damage. Instead, clean your spark plugs with a wire brush and brake cleaner, or use a special spark plug cleaning device.
Further Questions About Spark Plugs:
- How often should I change my spark plugs?
- Which spark plugs are right for my car?
- What signs indicate faulty spark plugs?
Visit our website autorepairaid.com to learn more about car maintenance and repair. Our team of automotive experts is available around the clock to help you with any questions and problems.
