OEM 2010 Cadillac STS Fuel Rail

2010 Cadillac STS Fuel Rail Parts Questions & Experts Answers

• Q: How to replace the Fuel Injection Fuel Rail Assembly on Bank 2 (LLT) on 2010 Cadillac STS?

  A: You must use proper methods to decrease system pressure from the fuel system prior to replacing the fuel injection Fuel Rail assembly on bank 2 (LLT). Start your replacement of the components by removing first the fuel pipe shield along with the high pressure fuel sensor. You should remove the Fuel Rail crossover pipe which you will discard. Edge the rear portion of the bank 2 Fuel Rail from the engine before complete removal with care while disconnecting the Fuel Rail bolts. The direct Fuel Injector hold down clamps need disposal due to the requirement for direct Fuel Injector rebuild each time they leave the Fuel Rail or cylinder head. You must rebuild your fuel injectors after complete removal of the Fuel Rail. Rebuilt direct fuel injectors must be placed into the cylinder heads followed by their installation with new hold down clamps. Silicon-free gm engine oil p/n 12345610 (Canadian P/N 9931930) or its equivalent should be used to lubricate new rail Fuel Injector cups before aligning the rail so its front faces forward with the front injector while rotating the rear downward. Begin installation by securing the outer Fuel Rail bolts first before proceeding to install the inner bolts. The torques should be applied by hand only. Torque tighten the Fuel Rail bolts in their installation sequence beginning at 12 nm (106 lb in) then finish at 23 nm (17 lb ft). The installation of a fresh Fuel Rail crossover pipe requires proper routing of electrical wiring to prevent any damage. After installing the Fuel Injector wiring harness electrical connector onto each piece it serves, go ahead with the installation process. Start the ignition during engine idle periods of two seconds followed by ten seconds idle before restarting the engine to check for fuel leakage. According to the service manual the final steps include putting back the fuel pipe shield and low side fuel pressure service port cap and fuel tank cap.