OEM 2002 Buick Regal Intake Manifold

2002 Buick Regal Intake Manifold Parts and Q&A

• Q: How to replace the upper intake manifold on 2002 Buick Regal?

  A: Begin the replacement process by disconnecting the negative Battery Cable followed by removing the fuel injector sight shield and air cleaner intake duct. Release the cooling system fluid before you remove the right Spark Plug Wires from the Ignition Control Module and relocate them. First drain fuel pressure then remove the Fuel Rail assembly and afterward break the booster hose from the vacuum source manifold. Begin by removing the egr valve wiring harness heat shield nut followed by disassembly of its bolt before removing both the egr heat shield and Throttle Body support bracket upper bolt. Unplug the electrical connectors from the evap purge solenoid, throttle position (T/P) sensor, idle air control (IAC) valve, manifold absolute pressure (MAP) sensor, and mass air flow (MAF) sensor. Evacuate the Throttle Body by removing its vacuum line for the purge solenoid followed by the bracketed cruise control and accelerator cables. Clean all upper intake bolts before pulling the upper manifold backwards from its position at the Throttle Body support bracket. Remove the upper-to-lower Intake Manifold carrier gasket that exists on the upper Intake Manifold. When performing upper Intake Manifold replacement it becomes necessary to also take off Throttle Body together with manifold absolute pressure (MAP) sensor and vacuum source manifold and positive crankcase ventilation (PCV) valve. When installing new parts replace the vacuum source manifold before installing the PCV Valve followed by the MAP Sensor and Throttle Body. The upper-to-lower Intake Manifold carrier gasket should be placed on top of the upper Intake Manifold before carefully installing the upper Intake Manifold to the lower Intake Manifold where alignment pins enter their proper holes. Use thread lock compound gm part number 12345382 (Canadian part number 10953489) on the bolt threads before installation while you tighten the upper Intake Manifold bolts (1-10) in sequence to 10 nm (89 inch lbs.). Fasten the Throttle Body accelerator and cruise control cables through their bracket before installing the evap purge solenoid vacuum line. You must connect electrical connectors to the maf sensor alongside the MAP Sensor, the iac valve and t/p sensor followed by the evap purge solenoid. After putting the Throttle Body upper support bracket bolt in place, tighten it to 10 nm (89 inch lbs.) and then install and tighten the egr valve wiring harness heat shield components to 10 nm (89 inch lbs.). Reattach the brake booster hose so it connects to the vacuum source manifold and the Fuel Rail assembly and to right Spark Plug Wires which lead to the Ignition Control Module. To finish installation you must secure the air cleaner intake duct and reattach the fuel injector sight shield before filling the cooling system and reconnecting the negative Battery Cable and performing fluid and vacuum leak checks.