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What Are Glow Plugs?

Spark plugs (or sparking plugs) ignite the fuel and air mix in the engine, enabling it to run. If your plugs
are damaged, dirty or substandard your engine’s performance will be seriously affected. It’s important
that you regularly check and service your spark plugs, irrespective of whether your vehicle is new or a
vintage model.

A spark plug has a central electrode which the high voltage electricity travels down to where it can then
travel across the gap to ignite the fuel/air. The central electrode must be insulated and the electrode tip
can be made of a combination of copper, chromium, nickel, iron or precious metals such as platinum,
iridium or yttrium. The insulator insulates the high voltage and is generally made of porcelain, although
some older spark plugs used mica as their insulator.

Please note, spark plugs are only suitable for use in petrol engines. Diesel vehicles require a slightly
different mechanism, a glow plug.



We Offer The Best Spark Plugs

The Green Spark Plug Company stock historic and iconic brands such as AC, Champion, KLG and
Lodge plus brands suitable for modern engines. Lodge Spark Plugs invented a lot of today’s more widely
used technologies, which are present in numerous brands of spark plugs, including NGK, Champion,
Bosch and Denso. Their pioneering technologies include inventions such as multi-electrode plugs and
special metal tips, including platinum.

In addition to the main suppliers mentioned above, we also stock spark plugs suitable for veteran,
vintage and classic engines. We sell new/unused ‘old stock’ which Tim Green has built up over the last
40 years. This is popular for those hard to find plugs and when sourcing original equipment for vehicles.
Each brand has its own, unique and interesting history. Esso, for example, were made by KLG and look
exactly the same as the original KLG plugs.

Lodge set up Motorcraft and their racing plugs are still
favoured by many of Tim’s friends today. Spark plug technology has been developed and refined for well
over a century, adapting to the differing needs of manufacturer specifications. Whether you have a personal favourite brand or are completely new to the world of spark plugs, we have
anything you could possibly need.



Our Spark Plug Finder

Our spark plug part finder will help you find the right spark plug for your petrol or LPG vehicle. Our spark
plug finder features all popular spark plugs from trusted brands including Denso, Bosch, Champion and
NGK.

Spark plugs are available in a wide range of sizes, from the small 6mm diameter of a Copper Core NGK
Spark Plug or a Champion Spark Plug V to the 22mm diameter of a Lodge Spark Plug ST or a Bosch
Spark Plug Z45T4. We offer all three types of tip configuration: single, twin and multi electrode, and a
variety of different seal and terminal types.

Remember, if your vehicle is diesel then use our Glow Plug Finder instead.

Simply select the correct details for your vehicle from the dropdown menus below and we’ll find you the
perfect spark plug.



Spark Plugs Part Finder

Our spark plug part finder will help you find the right spark plug for your petrol or LPG vehicle. Our spark plug finder features all popular spark plugs from trusted brands including Denso, Bosch, Champion and NGK. 

 

Remeber, if your vehicle is diesel then use our Glow Plug Finder instead.