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How to Replace International 7 3 Fuel Injectors

International Harvester made an eight-cylinder 7.3-liter diesel engine from 1988 to 1992. The engine was typically used in large Ford trucks from this period, such as the F250 3/4 ton pickup truck. The International 7.3-liter engine uses direct fuel injection.. The injectors for this engine do not require electronic control and are easily accessible, making it easy to replace them.

Instructions

1

Clean the fuel injector nozzles and fittings with fuel oil to prevent fuel contamination when you replace the injectors. Blow the area dry with an air compressor.

2

Release the retaining clamps on the fuel line to the fuel injector. Fetach the fuel lines from the fuel injectors with a flare nut wrench. Disconnect the run-off tees from the fuel injectors and discard their gaskets. Move the fuel lines out of your way, and cover the ends of the fuel injectors with plastic caps to keep dirt out of the injectors.

3

Turn the fuel injector counterclockwise with a socket wrench. Pull the injector from its bore, and discard the copper gasket. Clean the injector bore with special tool T83T-9527-A, and blow out the loose debris with an air compressor.

4

Dab a small amount of anti-seize compound on the nozzle of the new fuel injector, and mount a copper gasket to the injector. Install the fuel injector into its bore, and tighten it to 33 foot-pounds with a torque wrench.

5

Mount new gaskets to the run-off tees, and connect the run-off tees to the fuel injector. Connect the fuel lines to the fuel injector with a flare nut wrench, and attach the retainer clamps to the fuel injector. Start the engine and check for fuel leaks.

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