Fuel injector install

Inspect fuel injector. If necessary, perform a pressure test of the injector. Look for burrs on injector inlet. Check nozzle holes for hole erosion or plugging. Inspect end of the nozzle for burrs or rough machine marks. Look for cracks at the nozzle end. Check nozzle color for signs of overheating. If any of these conditions occur, replace the injector. Thoroughly clean fuel injector cylinder head bore with special Cummins wire brush tool or equivalent. Blow out bore hole with compressed air.

The bottom of the fuel injector is sealed to cylinder head bore with a copper sealing washer shim of a certain thickness. A new shim with correct thickness must always be re-installed after removing injector. Measure thickness of injector shim. Shim Thickness: 1. Install new shim washer to the bottom of the injector.

Apply a light coating of clean engine oil to the washer. This will keep washer in place during installation. Install new o-ring to fuel injector. Apply a small amount of clean engine oil to o-ring. Note fuel inlet hole on the side of the fuel injector. This hole must be positioned towards injector connector tube. Position injector into cylinder head bore being extremely careful not to allow injector tip to touch sides of the bore.

Press fuel injector into cylinder head with finger pressure only. Do not use any tools to press fuel injector into position. Damage to machined surfaces may result. Position fuel injector hold down clamp into shouldered bolt while aligning slot in the top of the injector into the groove in the bottom of the clamp.

Install new o-ring to fuel injector connector tube. Press injector connector tube into cylinder head with finger pressure only. Do not use any tools to press tube into position. Connect high-pressure fuel lines. The fuel line fitting torque is very critical. This leak will be inside cylinder head and will not be visible resulting in a possible fuel injector miss and low power.

Install valve cover. If necessary install intake manifold air heater assembly. If necessary install engine lifting bracket. Connect negative battery cables to both batteries.

Bleed air from high-pressure lines. Refer to Reprime fuel system procedure. October 12, October 10, Good article. I would only add that the crossover tube should be tightened BEFORE the hold down clamp so that the injector can move slightly to line itself up with the crossover tube if need be.

October 8, This article made it possible fir me to do this job by myself without any worries that I would not be able to pull it off in my own. By MoparMan December 15, Share More sharing options Followers 0. Fuel Injector Operation High-pressure fuel is supplied from the Bosch VP44 injection pump, through a high-pressure fuel line, through a steel connector, and into the fuel injector. Mopar's Notes Most of us will be doing full injector upgrades or replacements.

Remove the valve cover. Remove the injection lines 7. Mopar's Notes You can use a small flat blade screwdriver. Just hook one of the threads on the connector tube and lightly pry out. Be aware and not scratch the mating surface of where the tube and high-pressure line and the connector tube meet if you do there will be a fuel leak. Mopar's Notes Take one of your short intake bolts and thread it into the head of the injector. Tighten nut on tool to pull remove fuel injector from the cylinder head.

Mopar's Notes Use a screwdriver and pry the injector straight up carefully. Go to Cummins articles. Most Helpful Newest. Share this review. Great article, helps a lot to have torque specs and pictures. Link to review Share on other sites More sharing options Applications that are constantly in motion are prone to this wear over time. Put a thin layer of grease on the O rings that will help them stay in place. As for the head bolts use some of that loctite teflon tread sealant.

Put the orings in the freezer, or ice water, and work fast. According to the website WD40 is safe on rubber. The only materials which are mentioned as being affected are polycarbonate and clear polystyrene. A silicone lubricant is the best thing to use for lubrication of rubber parts. Vaseline or other petroleum products should never be used on rubber or neoprene objects. It can deteriorate the rubber or neoprene very rapidly. The correct lube to use is a silicone based lubricant, which comes with or without Teflon.

Vaseline , or petroleum jelly , is an oil based ointment that people can use to moisturize and soften dry skin. Although Vaseline may work as a sexual lubricant , it can damage latex condoms and increase the risk of infection and unintended pregnancy. It is better to use a water or glycol based lubricant. Oils, including mineral, lanolin, coconut, palm or jojoba oils, as well as Vaseline and other petroleum -based products, should not be worn under latex gloves.

These products break down chemical bonds in the material, thereby weakening the barrier properties. Some common choices were soap and water, alcohol, gasoline, motor oil , petroleum jelly and silicone spray.

While these products do provide lubrication , they also introduce health and safety risks and may damage rubber parts. It is a waterproof silicone-based grease made by combining silicone oil, usually polydimethylsiloxane PDMS , with a thickener, often silicone grease. It is essentially dielectric grease , but it is much thicker and last a long time.

Plumber's grease is used to lubricate and protect plumbing parts. What is the best lubricant for fuel injector O rings? Category: automotive auto parts. Can lithium grease be used on rubber?

Where do you apply silicone grease? Is Lithium Grease good for O rings? Re: Lithium Grease and O - rings. Can you use wd40 on O rings? What can I use instead of silicone grease? Is WD 40 a silicone lubricant? What is the number one cause of O ring failures? Do O rings need lubrication? How do you get an O ring to stay in place? Does wd40 damage rubber? How tight should an O ring be?