A diesel fuel injector is a very vital 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, in the course of time damage the fuel injector or reduce its productivity. Removing a diesel fuel injector is a simple process; however, it does needs some basic knowledge of the system. The following are simple step-by-step instructions which should assist you to easily perform this task yourself within an hour or so.
Depressurize and Drain Fuel
As fuel injector is under high pressure and contains high pressure fuel inside, that can spurt out violently if removed, it is essential that the fuel injector is drained and depressurized correctly. 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 is been relieved. The service manual of your automobile should offer you with easy step-by-step guidance to do this successfully.
EnSure the Engine is Cool
Remember, safety must comes first! Before you start removing the fuel injectors,ensure that the engine is cool so as to avoid any risk of burn injuries.
Also, before you start, make sure that the fuel injection system and all its parts are clean. Clean all connections on the fuel system and close any and all open connections as dust and dirt can spoil the entire fuel injection system.
Detach All Fuel Lines
If your engine has a fuel rail, then move on to the next step.
If, however, your vehicle engine has fuel lines instead of a fuel rail then remove both the fuel supply and the return lines from the injectors. This guarantees disconnection of any fuel supply to the injector, else, you risk getting fuel sprayed all over you.
Loosen the Fuel Rail
You can now remove the four bolts that are attached to the engine’s fuel rail in order to be able to move it. After this level, gently pry the fuel rail loose using a screwdriver. Take special care while carrying this out so as not to damage the fuel injectors while loosening the rail. Otherwise you will have to buy your entire set of fuel injectors again. The fuel rail should easily come loose now after you repeat the same process in three to four different places around the rail.
Loosen the Injector
Once you have shut out fuel delivery to the injector, you are now ready to proceed to remove it. The injector is kept in place in a holder that has bolts at its sides. Remove the bolts and take out the holder very carefully so as to avoid damaging anything. Keep the bolts and washers in a safe place.
Remove the Injector
Using the same wrench, pull out the injector carefully and gently, remove the rear most injector first. Ensure that the injector is pulled straight out of the bore in relation to the bore’s direction, lifting the injector at an angle can wedge the injector inside the bore. Now place the injectors on a suitable surface.