How to Remove a Diesel Injector: A Step-by-Step Guide
If you own a diesel engine, then it likely has injectors. That's because diesel engines need unique injection systems to operate. These injection systems are what give diesel engines their name. However, they are also prone to failure in many cases. Injectors can fail in a variety of ways and under different circumstances. They can become clogged or crack over time, but they can also become defective because of bad design or construction flaws. When this happens, the injector needs to be replaced before it causes further problems with your car. Replacing a defective injector is not overly difficult for most people with some automotive knowledge and skillset. Removing the old one and installing the new one is pretty straightforward once you understand the process involved - which we'll explore in this article below.
Why Do Diesel Injectors Fail?
Before we look at how to replace diesel injectors, let's take a closer look at why they fail in the first place. There are a few reasons for this, but the most common is clogging. Any diesel engine runs on diesel fuel, and the fuel injected into the machine will have specific contaminants. When the injectors are new, they can filter out these contaminants, but they will get clogged up over time. Once this happens, the injectors will need to be replaced. Another reason that diesel injectors will fail is because of cracking. Diesel engines can be very hot and pressurized, which can lead to cracking in the injectors. In many cases, you will hear a rattling sound coming from the area of the injectors and notice a burning smell.
What is Involved in Replacing a Diesel Injector?
The first thing that you need to do is remove the old injector. You will most likely need a unique tool for this. Then, it would be best if you connected the new injector. The injector will come with a new fuel line, so you will want to screw the new pipe into the injector and the fuel rail. After that, you must bleed the fuel system to ensure no air bubbles. Beyond that, you need to reset the fuel computer of your car. Computers are used in modern automobiles to control many different techniques, including the engine and transmission. So, when you replace a part in the machine, you will need to reset the computer so that it recognizes the change and doesn't throw a code.
How to Remove the Bad Diesel Injector(s)
The first thing you need to do is disconnect the battery and ensure that you have no sparks or open flames nearby. Sparks and open flames near diesel fuel are hazardous. Next, you can use a socket wrench to remove the fuel rail cover with the battery disconnected. Take care not to drop the body because you'll need to put it back on when you're finished. You can also remove the fuel rail, but you'll want to be careful because it can be pretty heavy.
Installing the New Diesel Injector(s)
With the old injector removed, you can install the new one. First, ensure that the new injector is oriented the same way as the old one. Now that you have the new injector installed, you need to screw the new fuel rail cover on and connect the fuel lines. Once you have ensured that there are no air bubbles in the system, you can reconnect the battery and start the car. You can also reset the fuel computer as necessary. After this, you can test the new injectors and make sure they are working correctly.
Conclusion
Owning a diesel engine is very convenient but requires special maintenance and care. One of the most important things to do when you own a diesel engine is to inspect and replace the injectors regularly. If you notice any issues with the injectors, you should have them inspected and replaced as soon as possible. Replacing diesel injectors is not overly complicated, but there are a few things that you need to be careful about. However, if you're careful and follow the steps outlined in this article, you should have no problem removing and replacing the diesel injectors on your car.
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