When used for a long time, it will often encounter some conditions such as soot, overheating,... These phenomena make it difficult for the car to operate and quickly fail the engine.

Sooty phenomenon

Soot is the phenomenon of carbon accumulating at the end of combustion causing voltage leakage, resulting in loss of fire.

Causes of soot:

- Spark plugs are stained with carbon soot: due to dirty air purification, the car leaves the gasoline mode over, the car is not in use for a long time; due to choosing the wrong type of spark plugs with too high heat index,...

For example: a small capacity vehicle should install BP5ES with the wrong BP7ES.

- Viscous spark plugs: When spark plugs have black, wet oil residue on porcelain and electrodes, it is the spark plug that is viscous. The reason is the opening of the bamboo shoots, which leads to too much oil in the combustion chamber.

Harm of soot:

When the high voltage generated by the fire core leaks according to the soot, fire loss can occur that makes it difficult to start and operate.

Overheating

- In the presence of overheating, the spark plug head turns red and ignites prematurely, resulting in abnormal combustion that can damage the piston.

- Electrode melting is also a form of overheating, due to the deposits on the porcelain being melted.

Causes of overheating: Too early ignition, scale in the combustion chamber, or choosing spark plugs with a lower than standard heat index.

For example: a high-capacity vehicle needs to be fitted with BP7ES, but chooses to install it by mistake as BP5ES.

Consequences of overheating: Abnormal overheating (800°C or more) can lead to abnormal combustion (premature ignition), causing electrode melting and engine damage.

How to fix the above conditions

- Check and maintain the vehicle and replace spark plugs periodically (8,000km for two-wheelers, 20,000km for four-wheelers).

- Use spark plugs in accordance with the heat index as recommended by the manufacturer.