Spark plugs play a pivotal role in the operation of a petrol internal combustion engine, serving as a vital component.
Their primary function is to ignite the air and fuel mixture within the engine’s cylinders.
The ignition system is responsible for supplying voltage to the spark plug at precise intervals, a process controlled either by the Engine Control Unit or an Ignition module.
As with many parts, spark plugs experience wear and tear over time, prompting most manufacturers to specify replacement intervals based on distance travelled and elapsed time.
Failure to replace worn spark plugs can result in difficulties igniting the air-fuel mixture, leading to engine misfires and increased fuel consumption.
In most engines, there is a spark plug assigned to each cylinder, though some manufacturers opt for two spark plugs per cylinder.
In certain vehicles, accessing the spark plugs necessitates the removal of the intake manifold.
The average cost for spark plug replacement typically ranges from $50 to over $280, contingent upon factors such as the type of spark plugs required (standard or Iridium) and whether additional components, like the inlet manifold, must be disassembled for access.
Spark plugs are crucial components in internal combustion engines, especially those powered by gasoline (petrol). They are small, yet essential parts located at the top of each cylinder in the engine block. Their primary function is to ignite the air-fuel mixture inside the combustion chamber of the engine.
A spark plug consists of a metal shell, an insulator, a central electrode, and a ground electrode. When the electrical voltage supplied by the ignition system reaches the gap between the central electrode and the ground electrode, it creates a spark. This spark ignites the compressed air-fuel mixture in the combustion chamber, initiating the combustion process that drives the engine.
Spark plugs are designed to withstand high temperatures and pressures inside the combustion chamber. However, over time, they can become fouled with carbon deposits or wear out due to erosion, leading to decreased performance, misfires, and increased fuel consumption. Therefore, regular inspection and replacement of spark plugs are essential for maintaining optimal engine performance and fuel efficiency.