BMW 13537542541 Injection Tube

To disconnect the negative battery cable, relieve fuel system pressure, and remove the engine cover, strut tower cross brace, and sound insulator. Remove ignition coils and high pressure fuel line. Disconnect the electrical connector to the high pressure sensor and loosen the high-pressure fuel pipe unions. Loosen fuel rail bolts and rotate the fuel rail to clear the injectors. Disconnect the electrical connectors from the injectors and remove the ground wire. Remove the hold-down elements and clean the area. Remove the injectors from the cylinder head and place plastic caps over each. Remove the coupling element from each injector and cut the Teflon ring. Clean the injector nozzle and install new Teflon rings if reusing the injectors. Program the adjustment values for new injectors. Install the injectors and tighten the coupling element bolts. Reconnect the high-pressure pipe unions. Tighten the injector clamp bolts and T-shaped coupling element mounting bolts. Reinstall the high-pressure fuel pump lines, ignition coils, and remaining components. For the 3.0L engine, remove the plastic cover, disconnect the fuel feed pipe, and remove the electrical connector strip. Remove the fuel rail and injectors as an assembly. Lubricate the fuel injector O-rings and install them to the fuel rail with the clips. Reverse the removal steps.

To disconnect the negative battery cable, relieve fuel system pressure, and remove the engine cover, strut tower cross brace, and sound insulator. Remove ignition coils and high pressure fuel line. Disconnect the electrical connector to the high pressure sensor and loosen the high-pressure fuel pipe unions. Loosen fuel rail bolts and rotate the fuel rail to clear the injectors. Disconnect the electrical connectors from the injectors and remove the ground wire. Remove the hold-down elements and clean the area. Remove the injectors from the cylinder head and place plastic caps over each. Remove the coupling element from each injector and cut the Teflon ring. Clean the injector nozzle and install new Teflon rings if reusing the injectors. Program the adjustment values for new injectors. Install the injectors and tighten the coupling element bolts. Reconnect the high-pressure pipe unions. Tighten the injector clamp bolts and T-shaped coupling element mounting bolts. Reinstall the high-pressure fuel pump lines, ignition coils, and remaining components. For the 3.0L engine, remove the plastic cover, disconnect the fuel feed pipe, and remove the electrical connector strip. Remove the fuel rail and injectors as an assembly. Lubricate the fuel injector O-rings and install them to the fuel rail with the clips. Reverse the removal steps.

To disconnect the negative battery cable, relieve fuel system pressure, and remove the engine cover, strut tower cross brace, and sound insulator. Remove ignition coils and high pressure fuel line. Disconnect the electrical connector to the high pressure sensor and loosen the high-pressure fuel pipe unions. Loosen fuel rail bolts and rotate the fuel rail to clear the injectors. Disconnect the electrical connectors from the injectors and remove the ground wire. Remove the hold-down elements and clean the area. Remove the injectors from the cylinder head and place plastic caps over each. Remove the coupling element from each injector and cut the Teflon ring. Clean the injector nozzle and install new Teflon rings if reusing the injectors. Program the adjustment values for new injectors. Install the injectors and tighten the coupling element bolts. Reconnect the high-pressure pipe unions. Tighten the injector clamp bolts and T-shaped coupling element mounting bolts. Reinstall the high-pressure fuel pump lines, ignition coils, and remaining components. For the 3.0L engine, remove the plastic cover, disconnect the fuel feed pipe, and remove the electrical connector strip. Remove the fuel rail and injectors as an assembly. Lubricate the fuel injector O-rings and install them to the fuel rail with the clips. Reverse the removal steps.

To remove and install the fuel rail and injectors, first ensure the ignition is switched OFF and the key is removed. For a quick check of the injectors, run the engine and touch each injector with a screwdriver or stethoscope to feel a vibration or hear a buzzing, then switch the engine OFF. Disconnect the battery negative cable, taking care to read the battery disconnection cautions beforehand. Remove the upper engine covers, then detach the oxygen sensor connectors and unclip the wiring harness from its holder, marking the connectors for reassembly. Unclip the oxygen sensor connector harness from the fuel rail and remove the Schrader valve cap from the fuel rail. Unscrew the fuel tank cap to release pressure and use a brief burst of compressed air to blow fuel back into the tank. At the fuel rail, remove the fuel line by pressing the release clip and pulling the line off. Remove the fasteners to take out the fuel rail, then pry the retaining clip from each injector and pull the injectors from the rail. For installation, reverse the removal steps, ensuring to fit new sealing O-rings on the injectors, lightly lubricating them for ease of installation. Check that the injector electrical connections are correctly fitted and that the injectors are fully seated before installing the fuel rail mounting bolts and replacing wire ties. After reinstalling, check and clear any fault codes from the ECM memory.