OEM Chevrolet Uplander Fuel Rail

Chevrolet Uplander Fuel Rail Parts and Q&A

• Fuel Rail
  12584908
  Q: How to service and repair the fuel rail and fuel injectors on Chevrolet Uplander?

  A:

  Before changing any parts of the Fuel Rail and Fuel Injectors a technician should record the identification number written on the Fuel Rail which consists of 8 digits. The correct placement of Fuel Injector o-rings requires professionals to install the black ring at the top while the brown ring should go at the bottom when colors differ to reduce the risk of fires and fuel leak injuries. Secure the fittings using caps while inserting plugging material into the holes to protect against contamination during service work. The leakage of fuel injectors leads to the contamination of engine oil with fuel. Start your work by taking off the fuel feed pipe from the Fuel Rail after removing existing electrical connectors. Separate the process by starting with removal of the Intake Manifold upper section and harness connector bracket bolt and proceeding to disconnect the camshaft position sensor connector. To begin with you should extract the Fuel Rail bolts while also removing the Fuel Rail . Discard the o-rings you obtain from the spray tip end of each injector. Take precautions to stop the pins on Fuel Injector electrical connectors from bending as well as to prevent exposing nozzles to any cleaning agents. Removal of Fuel Injector retaining clip along with Fuel Injector out of the Fuel Rail requires discarding the upper o-ring. New o-ring seals must be activated during installation because reusing existing o-ring seals is not permitted. The Fuel Injector exhibits a stamped part number for identification. First apply engine oil on the new injector o-rings before installing an upper o-ring along with the Fuel Injector into the Fuel Rail according to necessity. Keep the Fuel Rail service process safe through proper port plug use to prevent contamination and avoid all methods of Fuel Rail assembly cleaning apart from engine oil lubrication. Injection rail assembly installation requires a slight tilt while the technicians insert it into the Intake Manifold. They should then apply clean engine oil to the new lower injector rings before installation. Secure the Fuel Rail bolts at 10 n.m (89 lb in) and after that join the cmp sensor electrical connector to the system. Secure the Fuel Injector harness connector bracket onto the Intake Manifold while installing its bracket bolt which should be torqued to 8 n.m (71 lb in). Put the upper Intake Manifold in place while you reattach all electrical connectors and join the fuel feed pipe to the Fuel Rail. Before concluding the procedure verify there are no fuel leaks by enabling the ignition for 2 seconds followed by 10 seconds of no power and a final 2 seconds of ignition power while monitoring for leaks.
• Fuel Rail
  12587074
  Q: How to replace the fuel rail assembly on Chevrolet Uplander?

  A:

  The replacement of Fuel Rail assembly starts by reducing pressure within the fuel system. The black o-ring must be placed above the brown one while installing the fuel injector o-rings because these rings differ in their material composition even though they have identical dimensions. Service activities require proper measures for blocking fuel pathways from pollutants by using plugs for holes and caps for fittings. Engine fuel pipe connectors should receive cleaning before separation to prevent leakage. Trim off the fuel feed pipe retaining clip before extracting the engine fuel feed pipe from its connection to the Fuel Rail. Unplug the evaporative emission (EVAP) pipe from the evap canister purge solenoid valve. After that disconnect and remove the upper Intake Manifold. The service requires separation of the fuel injector harness together with the Coolant Temperature Sensor and Camshaft Position Sensor electrical connectors and the main fuel injector electrical connector. The procedure starts with Fuel Rail retaining bolt removal followed by the Fuel Rail assembly extraction. The technicians replace each injector's spray tip-end injector o-ring seal after the extraction. Proceed with the fuel injector replacement method when needed. For fuel injector nozzle installation into the lower Intake Manifold bores use gm p/n 12345616 lubricant along with canadian p/n 993182. The Fuel Rail should be pressed while moving it to achieve proper injector seating followed by tightening Fuel Rail bolts to 10 n.m (89 lb in). Reconnect all electrical connectors and apply gm p/n 12377900, (Canadian P/N 10953529) lubricant to the fuel injector electrical connectors before finishing. Connect the Fuel Rail first to its engine fuel feed pipe then link the evap pipe to the evap canister purge solenoid valve before placing back the upper Intake Manifold. Check for fuel leaks by keeping the ignition on for two seconds followed by turning it off for ten seconds and on one last time while inspecting for any leakage.