The various manuals for the Perkins 4-108 can be found at Engines Perkins The fuel injectors ("atomizers") are simply held in with two bolts, one on either side of each injector. Frankly, I don't see how you might have gotten anything into the injectors simply by running out of fuel. Unfortunately, the bleeding process for the 4-108 is not the Remove the injector pump from the fuel line. Bring it to a clean, well-ventilated, and well-lit work area. Step 2 - Take Injector Apart . Remove the O-rings at either end of the injector and soak it in carburetor cleaner overnight. The next day, remove the injector from the bucket and blow it clean with compressed air. Remove the old injectors. Once a truck is stabilized in a service bay with the keys removed from its ignition and battery supply disconnected, a technician can begin the process of removing the old fuel injectors. It is very uncommon that the actual injector (metal) lines would be leaking. It is most likely the return line o-rings which will ooze fuel out the top of the plastic cap and make it look like the injector line is leaking. For every action there is an equal and opposite malfunction. 1988 F350 CC 4x4 SRW, 7.3 Banks non-wastegated turbo, C6 w/ HD Repeat the screwdriver test on each injector and take note of each one that you can’t hear clicking. Turn off the engine and turn on the battery so the lights, radio, and other electronics are on but not the engine. Connect the clip of the automotive test light to the negative terminal of your vehicle’s battery. Oven cleaner's main ingredient is lye. Lye is very, very aggressive at corroding aluminum (corrodes all sorts of things, but aluminum is particularly vulnerable). If the oven cleaner gets down past the injector into your cylinder, it's going to do bad things. I've had great luck with some penetrating oil called Kroil. 762 posts · Joined 2020. #3 · Aug 3, 2021. To remove hood on a 4020 remove 1 bolt on each side at the rear of hood after removing the side shields that have spring loaded pins. Then remove side screens by pulling on the top of the screens. The screens have springs attached at the top & 2 pins that rest in holes at the bottom of each screen. However, looking at those threads, the first is for a diesel; the second discusses Witchunter Performance & Dr Injector servicing (much as in this "Decent Techron thread"); the third mentioned Bosch injectors; the fourth talks about fuel-injector cleaners as does the fifth. Therefore, none of them are particularly useful for an injector removal ZaNAmQ.