OEM 2003 Chevrolet Impala Intake Manifold

2003 Chevrolet Impala Parts Questions & Experts Answers

• Q: How to replace the upper intake manifold on 2003 Chevrolet Impala?

  A: The EGR Valve and the maf sensor and iat sensor and iac valve and t/p sensor and evap canister purge valve require electrical connector disconnection. The repair process includes connecting evap canister purge valve and t/p sensor electrical connectors as well as iac valve and iat sensor electrical connectors and maf sensor electrical connectors and EGR Valve electrical connectors and installing the vacuum hoses to the heater and air conditioning source and Brake Booster and manifold vacuum source and evap canister purge valve and Fuel Pressure Regulator while reconnecting the negative cable terminal and filling the cooling system. Accessory the air cleaner intake duct while emptying the cooling system fluid. You should first disconnect the Throttle Body's accelerator control and cruise control cables with bracket and then separate the left-side Spark Plug Wires from the spark plugs. The team will disconnect the camshaft position (CMP) sensor wiring harness and the left side Spark Plug wire harness and engine wiring harness from their retainers. Disconnection of thermostat bypass pipe coolant hoses (3, 4) must be performed at the Throttle Body area and at the ignition coil bracket with the coils and at the evap canister purge valve and at the manifold absolute pressure (MAP) sensor bracket. Begin by removing the EGR Valve followed by the upper Intake Manifold bolts and stud therefore accessing the upper Intake Manifold and gaskets. Replacement of the upper Intake Manifold requires the removal of the Throttle Body together with cleaning of the upper intake gasket mating surfaces. Begin the installation by mounting the Throttle Body along with the upper Intake Manifold gasket installation followed by fitting of the upper Intake Manifold. Secure the right upper Intake Manifold bolts and stud using 25 nm torque (18 ft. Lbs.). The installation process includes first reattaching the EGR Valve and MAP Sensor bracket and sensor along with the evap canister purge valve and ignition coil bracket with coils and the thermostat bypass pipe coolant hoses (3, 4) to the Throttle Body. Secure the engine wiring harness and left side Spark Plug wire harness alongside the camshaft position (CMP) sensor wiring harness to their respective retainers before attaching the left side Spark Plug Wires to each Spark Plug. Attach the Throttle Body accelerator and cruise control cables through their bracket before installing the air cleaner intake duct. The final step involves connecting evap Canister Purge Valves and egr valves while installing vacuum hoses which lead to the heater and air conditioning source and Brake Booster and manifold vacuum source and Fuel Pressure Regulator. Connect t/p sensors and iac valves and iat sensors and maf sensors to their electrical connectors. Reconnect the negative Battery Cable and complete the cooling system filling.