OEM 2009 Buick Lucerne Intake Manifold

2009 Buick Lucerne Intake Manifold Parts Questions & Experts Answers

• Q: How to replace the upper intake manifold on 2009 Buick Lucerne?

  A: The replacement of the upper Intake Manifold begins by disconnecting the negative Battery Cable. Before installing a new upper Intake Manifold start by removing the Intake Manifold cover while draining the cooling system through vac-n-fill or static fill methods. Begin by detaching the positive crankcase ventilation (PCV) fresh air tube and fouled air tube before removing the Brake Booster Vacuum Hose installed on the Intake Manifold fitting. The next step requires you to move the heater inlet and outlet hose/pipe clamps from their current positions at engine pipes before completely removing the heater hoses/pipes from Throttle Body studs. First move all hoses and pipes to a safe position then slice off the fuel line and evaporative emission (EVAP) line clip from the manifold absolute pressure (MAP) sensor bracket. The service technician removes connectors from three key components: map sensor, evap canister purge solenoid, and electronic throttle control (ETC). Start by removing the air cleaner outlet duct followed by disconnecting and removing the left side Spark Plug Wires. Disassemble Throttle Body bolts while breaking free the Throttle Body with its gasket material. When installing a new manifold remove the Throttle Body studs from the manifold followed by the evap canister purge solenoid bolt and valve assembly. Start by removing ignition coil bracket bolts that anchor it to the Intake Manifold followed by Power Steering Reservoir loosen bolt toward the Intake Manifold and lastly remove the bracket bolts connecting the generator to the Intake Manifold. Seal off the lower Intake Manifold first by removing the upper Intake Manifold bolts and stud and Intake Manifold cover ball stud nut then separate the upper and lower manifolds altogether. You need to clean both mating surfaces after putting on the new upper Intake Manifold to the lower Intake Manifold. Shield the upper Intake Manifold bolt/stud threads with threadlock then secure them with 25 nm (18 lb ft) torque. Begin by installing the Intake Manifold cover ball stud nut until it reaches a torque of 5 nm (44 lb in). Afterward, tighten the ignition coil bracket to Intake Manifold bolts to 25 nm (18 lb ft). First tighten the evap canister purge solenoid valve's bolt to 16 nm (12 lb ft) before reinstalling the MAP Sensor and its bracket with 25 nm (18 lb ft) torque setting on the bolts. First check for damage on the Throttle Body seal then get a new one if needed before applying threadlock to the Throttle Body studs and bolts. Set the Throttle Body Gasket in position with the Throttle Body then install Throttle Body studs if present before securing the studs to 6 nm (53 lb in). Reinstall the left Spark Plug Wires before connecting their retainer clips. Finally, secure the Throttle Body bolts and nuts at 10 nm (89 lb in). First install the air cleaner outlet duct after you connect the left side Spark Plug Wires to their ignition coil and spark plugs. Reinstall both the evap canister purge solenoid electrical connector and the chassis evap line quick connect fitting to connect with the purge solenoid. After installing the MAP Sensor bracket clip securing the fuel feed and evap line the technician connects etc and MAP Sensor electrical connectors before completing their work. After setting hoses/pipes in position you must install heater inlet and outlet hoses/pipes before tightening clamp nuts to reach torque specifications of 10 nm (89 lb in). After repositioning the hose/pipe clamps for the heater inlet and outlet, install the Brake Booster Vacuum Hose and pcv tubes. After filling the cooling system using vac-n-fill or static fill you should install the Intake Manifold cover before reconnecting the negative Battery Cable.