Spark Plugs

Your vehicle's engine needs three key ingredients to run: fuel, spark and compression. The spark plugs within your vehicle are a critical component, they provide the spark from the engine's ignition coils(s) to ignite the air-fuel mixture within your engine.

Replacing your spark plugs is an important part of routine maintenance and servicing for your engine. Without a set of fully functioning spark plugs, you can notice running issues such as poor fuel economy, lack of acceleration or general performance, poor idle conditions, cylinder misfires, hard starting or even an engine that won't run at all. There may also be a build-up of carbon in the combustion chamber from unburnt fuel from not having the plugs spark.

Between replacement periods for your spark plugs, use a spark plug socket to remove the plug and perform a quick visual inspection. Examine for any oil or fuel deposits known as fouling on the tip of the plug, which can hamper spark performance. You'll also want to look out for any damage to the spark plug threads and any cracks or other marks on the spark plug.

Whether you need standard nickel spark plugs, iridium spark plugs, platinum spark plugs, or Repco is your one-stop shop when it comes to fitting the best replacement spark plugs to your engine.

Never deviate from the specifications recommended by the manufacturer regarding the spark plugs in your engine. Various dimensions and critical components need to be adhered to, but elements such as the ground electrode and material on the centre electrode can differ. Most vehicles will use a traditional type of spark plug, but there also exist surface discharge spark plug variants. A Surface discharge spark plug differs from standard spark plugs as the length of the centre ceramic material in a normal plug is adjusted to keep a certain amount of heat in the centre electrode to help prevent fouling. True surface gap spark plugs have no heat range. In comparison to regular spark plugs, these are as cold a heat range as you can get. These spark plugs were developed for and with engines using very high-energy ignition systems, which are required to prevent fouling. These are not common types of plugs.

If you need to fit replacement spark plugs, diagnose a misfire or even keep some spares on hand, Repco offers a huge range of spark plug options to suit a massive range of vehicles, both old and new.