S4K Used Fuel Injection Pump For Excavator E120B 101062 - 8520

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How to Remove a Diesel Fuel Injector
Written by Heaven Stubblefield on Feb 26, 2010 Reviewed by H.R. Helm on Jan 21, 2020
a person working on a car engine
2-4 hours •Advanced •0-100
What You'll Need
A diesel fuel injector is a very important component of the diesel car's engine. The diesel engine, unlike the gasoline engine, injects fuel directly into the cylinder. This exposes it to heat and pressure, which might, overtime, damage the fuel injector or decrease its productivity. Removing a diesel fuel injector is a simple process; however, it does require some basic knowledge of the system. The following are simple step-by-step instructions which should allow you to easily perform this task yourself within an hour or so.

Step 1 - Depressurize and Drain Fuel
As fuel injector is under high pressure and contains high-pressure fuel inside, which can spurt out violently if removed. It is essential that the fuel injector is drained and depressurized properly. Therefore, the first thing that you should do is to ensure that there is no fuel in the fuel pump or rail and that the pressure in the fuel injector has been relieved. The service manual of your automobile should provide you with easy step-by-step guidance to do this successfully.

Step 2 - Make Sure the Engine is Cool
Remember, safety always comes first. Before you begin removing the fuel injectors, make sure that the engine is cool so as to avoid any risk of burn injuries.

Step 3 - Clean Everything
fuel pump

Also, before you begin, make sure that the fuel injection system and all its components are clean. Clean all connections on the fuel system and close any and all open connections since dust and dirt can destroy the entire fuel injection system.

Step 4 - Detach All Fuel Lines
If your engine has a fuel rail, then proceed on to the next step.

If, however, your engine has fuel lines instead of a fuel rail, then remove both the fuel supply and the return lines from the injectors. This ensures disconnection of any fuel supply to the injector. Otherwise, you risk getting fuel sprayed all over you.