Spark plug (long thread, only for square cylinder-head!) Fiat 126 square/124SP/125

Spark plug (long thread, only for square cylinder-head!):

Are you looking for maintenance kit? Then click here!

This product fits the following models:

• Fiat 126 square
• Fiat 124 SP
• Fiat 125

Attention! Only for square cylinder-head, as seen on this Picture:

NGK has been a leading Japanese manufacturer of spark plugs, diesel engine glow plugs, ignition coils, lambda sensors, and exhaust gas temperature sensors since the 1930s and is one of the market leaders among automotive suppliers, including in the original equipment manufacturer (OEM) segment for new vehicles. The company, headquartered in Nagoya, has built an excellent reputation over the last few decades, especially with its highly durable spark plugs. Currently, NGK produces over 1,000 different types of spark plugs for numerous automobiles, motorcycles, motorsports, and other applications.

The Spark Plug:

In gasoline engines, air is drawn into the combustion chambers of the cylinders. This air is supplied with finely atomized fuel, which has been cleaned by a fuel filter. This combustible mixture must be reliably and precisely ignited. This responsibility falls on the spark plugs - each cylinder has its own spark plug.

The optimal time for the spark is when the compression of the mixture in the combustion chamber is at its highest, just before the piston reaches its highest point. In the past, the ignition timing was mechanically controlled through a distributor; in modern engines, the calculation of the correct timing is done electronically.

An electrical voltage is transmitted to the spark plug via the ignition cables or (in more modern engines) generated directly at the spark plug in the spark plug connector. The spark plug has two electrodes between which there is a gap. If the voltage at the first electrode - the center electrode, surrounded by a ceramic insulator - becomes too high, a spark occurs to the second electrode - the ground electrode, connected to the thread of the spark plug.

A spark plug must withstand extreme stresses:

• High temperatures - 2500 to 3000 degrees - are not uncommon in the combustion chamber of the cylinder
• High pressure - 60 to 100 bar
• High electrical voltage - several 10,000 volts make the sparks jump
• High chemical stress from chemicals in the fuel and residues from the combustion process