Glow plugs are essential components in diesel engines. These small but powerful devices help diesel engines start efficiently, especially in cold climates.
Throughout this article, we will delve into what glow plugs are, how they work, when they should be replaced, and where to buy them.
What are glow plugs
Glow plugs are electrical components designed to heat the air inside the combustion chamber of a diesel engine. Unlike gasoline engines, diesel engines do not use spark plugs to generate combustion. Instead, the diesel engine relies on compression to raise the temperature of the air and thus ignite the fuel. However, in cold climates or when the engine is at rest, the temperature inside the combustion chamber may be too low to ignite the diesel with compression alone.
This is where glow plugs come into play. These plugs heat the combustion chamber so that the air-fuel mixture can ignite more effectively and quickly. This process ensures that the engine starts easily, reducing wear and potential damage to the engine.
How glow plugs work
The operation of glow plugs is simple but crucial. When the ignition of a diesel vehicle is activated, the glow plugs begin to heat up by electricity. Their tip reaches extremely high temperatures, generally between 800 and 1000 degrees Celsius, which heats the air inside the combustion chamber.This heating process occurs in just a few seconds, allowing the engine to be ready to start quickly. After the engine starts, some glow plugs continue to operate for a few more minutes to ensure that the engine runs smoothly until it reaches its optimal operating temperature.
When to change the glow plugs
Glow plugs, like any other engine component, have a limited lifespan. Although they are robust and designed to last, they eventually wear out and must be replaced. Ignoring the signs of wear can lead to starting problems and damage other engine components.
Some signs that it is time to change the glow plugs include:
- Difficulty starting the engine: If you notice that the engine takes a long time to start, especially in cold climates, the glow plugs may not be working correctly.
- Excessive smoke when starting: If when starting the vehicle you see an unusual amount of white smoke coming from the exhaust, this could indicate that the glow plugs are not heating the engine adequately.
- Poor engine performance: If the engine does not respond as it should, or if performance has decreased considerably, the plugs may be worn.
In general, it is recommended to check the glow plugs every 80,000 to 100,000 kilometers, although this may vary depending on the vehicle model and usage conditions.
How to change glow plugs step by step
Changing the glow plugs is a relatively simple process, although it is recommended that a professional mechanic do it to avoid damage to other components. If you decide to do it yourself, follow these steps in detail:
- Turn off the engine and disconnect the battery: Before starting, make sure the engine is completely off and the battery is disconnected to avoid any risk of electric shock.
- Locate the glow plugs: The glow plugs are located on top of the engine, usually under the engine cover. Remove any cover or component that prevents access to the plugs.
- Disconnect the electrical connectors: Disconnect the cables that are connected to each glow plug, making sure not to damage them.
- Remove the plugs: Use a suitable wrench to loosen and remove the plugs. Do this carefully, as the plugs may be fragile if they are very worn.
- Install the new plugs: Place the new glow plugs in place and tighten firmly, but without overtightening to avoid damaging the threads.
- Reconnect the connectors: Reconnect the electrical cables to each plug, making sure they are well connected.
- Reinstall the covers: If you removed any cover to access the plugs, replace it.
- Connect the battery: Finally, connect the battery and start the engine to verify that everything works correctly.
Where to buy glow plugs: Oscaro
If you need to buy quality glow plugs, one of the best options is Oscaro. At Oscaro, you can find a wide variety of spare parts and parts for vehicles, including glow plugs for different car models. In addition, they offer competitive prices and a simple and secure purchasing process. You can access their catalog and see all the available options through their website.
Glow plugs play a vital role in the operation of diesel engines, especially in cold climates. They ensure a smooth and efficient start, protect the engine and improve the overall performance of the vehicle. Making sure they are in good condition and replacing them when necessary is essential to avoid major problems.
Remember that if you notice signs of wear such as difficulty starting or excessive smoke, it is likely time to change the glow plugs. If you decide to do the change yourself, follow the steps described above carefully to ensure correct installation. And if you are looking for a reliable place to buy new plugs, Oscaro is an excellent option for acquiring high-quality parts.
