OEM Buick Rendezvous Fuel Rail

Buick Rendezvous Fuel Rail Parts Questions & Experts Answers

• Fuel Rail
  12587074
  Q: How to replace the fuel rail assembly on Buick Rendezvous?

  A:

  The primary step for replacing the Fuel Rail assembly involves removing fuel system pressure from the components. The repair area needs complete cleaning around all fuel pipe systems and evaporative emission (EVAP) unit connections to prevent contamination. The technician must disconnect both the fuel feed pipe from the Fuel Rail and the evap pipe from the evap canister purge solenoid valve. Remove the upper Intake Manifold and disconnect first the engine harness electrical connector from the Fuel Injector harness electrical connector and then disconnect the Fuel Injector harness electrical connector from the engine coolant temperature (ECT) sensor and the camshaft position (CMP) sensor. Competent technicians uninstall the Fuel Rail's bolts and remove the rail before extracting o-ring seals from each injector's spray tip to take out the fuel injectors from their mounting position on the rail. Execute careful handling of all fuel system components by plugging both ports of the Fuel Rail before installation in order to prevent contamination. New lower o-ring seals should be installed to the fuel injectors before use and gm p/n 12345616 (Canadian P/N 993182) or an equivalent lubricant should be applied to injector tip o-rings. Raw Fuel Injector bores receive the fuel injectors followed by Fuel Rail pressuring until each injector reaches full seating. Place the Fuel Rail bolts on the mounting points before tightening them to 10 n.m (89 lb in). Conduct this connection by installing the Fuel Injector harness electrical connector first to the cmp sensor and ect sensor then to the engine harness electrical connector. The technician should reinstall the upper Intake Manifold while he reconnects the evap pipe to the evap canister purge solenoid valve before connecting the fuel feed pipe to the Fuel Rail. To finish the service the technician must re-establish the negative Battery Cable and perform a fuel leak inspection through a sequential ignition turn-on sequence of 2 seconds off for 10 seconds followed by a third ignition turn-on.