GM 89017365
Intake Manifold

Before starting the Intake Manifold replacement process remove Throttle Body and fuel injectors and disconnect electrical connectors of MAP Sensor along with the Knock Sensor. Before continuing remove the Knock Sensor harness connector from the Intake Manifold to set it alongside the electrical harness. Begin manifold replacement by first removing the vacuum brake booster hose from behind the Intake Manifold and next move to the positive crankcase ventilation (PCV) hose with valve. Separate the evaporative emission (EVAP) purge solenoid vent tube by disconnecting it from the solenoid and vapor pipe . Detach the MAP Sensor as part of this sequence. Remove the evap purge solenoid bolt and solenoid and isolator from the Intake Manifold then loosen and remove the Intake Manifold with its gaskets while discarding the old gaskets. The Intake Manifold requires cleaning as well as an inspection. After securing new Intake Manifold gaskets onto the Intake Manifold you should install the manifold. The threads of the Intake Manifold bolts require threadlock gm p/n 12345382 (Canadian P/N 10953489) applied in a 5 mm (0.20 inch) length band. Follow a sequence when tightening Intake Manifold bolts by starting with 5 nm (44 inch lbs.) in the first pass followed by a final pass at 10 nm (89 inch lbs.). Secure the Intake Manifold bolt with threadlock gm p/n 12345382 (Canadian P/N 10953489) to a torque setting of 10 nm (89 inch lbs.) then install the evap purge solenoid, isolator, and bolt to the Intake Manifold. Before fittings the evap purge solenoid vent tube onto the solenoid and vapor pipe make sure to apply a light coating of clean engine oil on the MAP Sensor seal. First install the MAP Sensor before securing the pcv hose with valve while attaching vacuum brake booster hose to the Intake Manifold rear. The electrical harness follows the engine path while connecting the Knock Sensor harness electrical connector to the Intake Manifold and MAP Sensor and Knock Sensor . Install the fuel injectors while you also install the Throttle Body at the end of the process.

The replacement process for an Intake Manifold begins with removing the Throttle Body and fuel injectors before disconnecting the electrical connectors which supply power to the manifold absolute pressure (MAP) sensor and Knock Sensor. The electrical harness should be put aside after removing the Knock Sensor harness connector. The vacuum brake booster hose needs removal from the Intake Manifold's rear before disconnecting the positive crankcase ventilation (PCV) hose. Begin by disconnecting the MAP Sensor and evaporative emission (EVAP) purge solenoid vent tube from their solenoid attachment to the vapor pipe. Use a socket set to remove the manifold's evap purge solenoid bolt and solenoid and isolator components. Proceed to slowly loosen and remove the Intake Manifold with its accompanying gaskets. Discard the existing gaskets. Check the Intake Manifold condition after cleaning it thoroughly when necessary. Installation requires you to place new Intake Manifold gaskets onto the Intake Manifold before installing the manifold. A 5 mm (0.20 inch) strip of gm p/n 12345382 threadlock (Canadian P/N 10953489) should be applied to the Intake Manifold bolt threads before torquing them in sequence to 5nm (44 inch lbs.) for the initial stage and concluding at 10 nm (89 inch lbs.). The evap purge solenoid and isolator and bolt should be reinstalled and the bolt fastened to 10 nm (89 inch lbs.). The evap purge solenoid vent tube requires connection between solenoid and vapor pipe. Engine oil treatment of the MAP Sensor seal should be gentle before the sensor is secured to the Intake Manifold. Secure the pcv hose and (when needed) the vacuum brake booster hose onto the Intake Manifold's rear surface. You should direct the electrical harness over the engine space and join the Knock Sensor harness to both the MAP Sensor and Knock Sensor connectors . A final installation step involves placing the fuel injectors together with the Throttle Body.

Before replacing the Intake Manifold you should begin by disconnecting Throttle Body and fuel injectors. First disconnect the electrical connections of both the manifold absolute pressure (MAP) sensor and Knock Sensor before removing the Knock Sensor harness connector from the Intake Manifold. Set the electrical harness aside and if your car has vacuum braking set the vacuum brake booster hose loose at the Intake Manifold's rear side. First disconnect the positive crankcase ventilation (PCV) hose followed by removing the MAP Sensor. To remove the evaporative emission (EVAP) purge solenoid you must separate the solenoid from its vent tube and vapor pipe connections before removing the solenoid bolt and solenoid unit and isolator from the Intake Manifold. Begin by loosening all Intake Manifold bolts then eliminate the Intake Manifold from the engine along with the gaskets. Eliminate and discard the aged gaskets. Inspection and cleaning are optional steps for the Intake Manifold. First install new Intake Manifold gaskets onto the Intake Manifold before securing the manifold in position. Apply threadlock gm p/n 12345382 (Canadian P/N 10953489) with a 5 mm (0.20 inch) band to Intake Manifold bolts then tighten them by sequence in two steps of 5 nm (44 inch lbs.) and 10 nm (89 inch lbs.). Install the evap purge solenoid together with its isolator and bolt by tightening the bolt to 10 nm (89 inch lbs.). Before reinstalling the MAP Sensor onto the Intake Manifold, apply engine oil to the MAP Sensor seal but maintain a light coat. Also prepare the solenoid and vapor pipe for attachment to their vent tube. Connect the pcv hose followed by the vacuum brake booster hose to the Intake Manifold rear. Guide the electrical harness into proper engine positioning then install the Knock Sensor harness to the Intake Manifold before reattaching MAP Sensor and Knock Sensor electrical connectors. Place the Throttle Body and fuel injectors back in their proper slots.

Remove the engine wiring harness bracket and ground wire.

Attach the vent tube to the solenoid and vapor pipe, ensuring to lightly coat the MAP sensor seal with clean engine oil before installing the MAP sensor back onto the intake manifold.