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The Importance of Spark Plugs

Update:19 Feb 2022


The main function of a spark plug in a car is to deliver an electrical current from the ignition system to the combustion chamber. This spark ignites a fuel-air mixture by creating a small electric discharge. It also helps to contain the pressure of combustion in an engine. A spark plug has an important role in an engine's performance. If you have one in your vehicle, it's crucial to maintain it properly and replace it as often as necessary.

A spark plug seals the combustion chamber when installed. It prevents leakage from the combustion chamber. The internal seal is made of compressed glass/metal powder while the old style was made of a multi-layer braze. The external seal is generally a crush washer. Some manufacturers use a taper interface to connect the electrode to the base, while others use a simple compression. The sealing surface is the part of the spark plug that has to be cleaned regularly.

Spark Plugs are made of two types of materials - the insulator body and the ground electrode. Platinum spark plugs have a higher melting point and last longer. Iridium plugs have a lower melting point but require less voltage to produce a spark. Ruthenium plugs are more expensive than iridium, but claim superior durability. Silver sparks are silver coated electrodes and do not offer the same durability as the other two.

Spark plugs contain a metal center electrode and a ceramic ground electrode. The platinum plug has a platinum center electrode that is more resistant to heat and will last longer. Iridium spark plugs have a smaller center electrode and can be used in older cars. Iridium spark plugs are less expensive, but require a higher voltage to generate a spark. Another option is silver. They have a silver coating and are not as durable as iridium or platinum.

Spark plugs are made from two materials: a metal body and a ceramic insulator. The metal body is made of a high-quality aluminum alloy. The insulator body is a very durable material that can withstand millions of explosions. The copper center electrode is more resistant to heat than iridium. However, platinum and iridium spark plugs are more expensive than iridium. Hence, it is necessary to check these spark plugs regularly.

In a car, a spark plug has two parts - an insulator body and a ground electrode. The insulator body is the part that generates the spark. The electrode body is made of metal. The electrodes have a very small gap. The metal is thin, so they can be eroded more quickly. The insulator is also used in automobiles. The insulator is a crucial component of the car.