GM 17113541
Intake Manifold

Apply gm p/n 12346141 adhesive with a 4.0 mm (0.157 inch) patch to each end of the Cylinder Head side of the lower Intake Manifold gasket before inserting the gasket onto the Cylinder Head through the gasket locator pins for correct seating. All sealing surfaces should remain completely free from oil together with dirt and foreign materials during installation. Apply 5 mm (0.197 inch) of adhesive gm p/n 12346141 or equivalent to both engine block locations starting at the front top and extending 13 mm (0.50 inch) onto each lower Intake Manifold gasket. Continue this process at the rear top of the engine block. Place the lower Intake Manifold onto the engine block and cylinder heads and secure it with threadlock gm p/n 12345382 or equivalent on each lower Intake Manifold bolt threading. Cap off the proper tightening procedure marked by sequence and torque requirements. The installation requires three consecutive torque settings: initial 3 nm (27 inch lbs.) for the first pass (1-8) then 12 nm (106 inch lbs.) for the second pass followed by 15 nm (11 ft. Lbs.) as the final pass. To complete the connection for the evaporative emission (EVAP) canister purge solenoid valve harness simply push the elbow towards the valve and watch for the quick connect to snap into position. Afterward carefully pull the elbow back to verify the proper connection.

To remove the upper Intake Manifold, the negative cable from the battery first needs to be disconnected. Take off the intake air resonator and the air cleaner inlet tube from the Throttle Body along with a crankcase ventilator tube and the PCV Valve from the valve rocker arm cover. Remove the egr pipe from the upper Intake Manifold and if equipped, left and right side secondary air injection pipe. Then you remove the Ignition Coil, throttle body, evap canister solenoid valve, and the number 8 spark plug wire from the Distributor. Then remove the upper Intake Manifold bolts, and remove it along with the gaskets. Remove carbon deposits in excess on exhaust and EGR Valve passages. For an installation, you should install the upper Intake Manifold, then, install the upper Intake Manifold gaskets. Apply a minimum of eight threads of thread locking sealant on bolts then install and tighten the upper Intake Manifold bolts in sequence to 8 nm (71 in. Lbs.) and re-tighten to 18 nm (13 ft. Lbs.). Replace the number 8 spark plugin wire, the Ignition Coil, and the EGR Valve if needed, then replace it with the egr pipe while tightening the EGR Valve fittings up to 60 nm (46 ft lbs). Please install the left and right side secondary air injection pipes if fit and the evap canister solenoid valve, throttle body, the PCV Valve, crankcase vent tube, and the air cleaner intake duct before installing the intake air resonator. Finally, reattach the negative tip of the battery, which will finish the procedure.

Start replacement of the upper Intake Manifold by disconnecting the negative Battery Cable. You must first remove the engine cover alongside the air cleaner intake duct. The process requires removing the electrical connector which feeds fuel injectors and also disconnecting the manifold absolute pressure (MAP) sensor along with the evap canister purge solenoid valve and idle air control (IAC) solenoid and throttle position (TP) sensor. You can disconnect the vacuum brake booster hose and the pcv tube by using counterclockwise twisting. Detach the Spark Plug Wires from the left Distributor Cap side before removing fuel lines from the engine's rear area together with any air bypass hose assemblies. Disconnect the following parts for the repair: throttle body and Intake Manifold as well as the throttle shaft cable that contains the accelerator control cable and cruise control cable and the accelerator control cable bracket. Start by cleaning all sealing surfaces before breaking the upper Intake Manifold bolts and pulling out the upper Intake Manifold. Start by placing the upper Intake Manifold onto the engine. Torque each stud to 12 nm (44 inch lbs.) followed by an additional 10 nm (89 inch lbs.) for the second pass. Secure the accelerator control cable bracket to the Throttle Body and lower Intake Manifold with bolt and nut torques set to 12 nm (106 inch lbs.). Reinstall the throttle shaft connections for accelerator control and cruise control cables followed by installation of evap canister purge solenoid valve and fuel pipes followed by Distributor Cap left-side plug wire connections. The installation order includes fitting the pcv tube by turning the locking mechanism and the vacuum brake booster hose and the air bypass hose assembly. The next step involves connecting three electrical components along with the MAP Sensor and three additional solenoids and the tp sensor. Finish the installation by moving forward with the air cleaner intake duct and engine cover while reconnecting the battery negative cable.

Install a NEW seal on the fuel meter body assembly and lubricate it with clean engine oil.

Connect the fuel injector electrical connector, MAP sensor, EVAP canister purge solenoid valve, IAC solenoid, and TP sensor.

Install the air cleaner intake duct, engine cover, and reconnect the battery negative cable.

Remove the retaining bolts for the fuel rail and the fuel rail itself, followed by the lower intake manifold bolts from the engine head.

Remove the air cleaner assembly, detach the upper radiator hose, both heater hoses, and the water pump inlet hose.

The intake manifold, throttle body, fuel injection rail, and fuel injectors.

Remove the engine cover and take off the air cleaner intake duct.

Remove the Manifold Absolute Pressure (MAP) sensor if necessary.

Begin by removing the Manifold Absolute Pressure (MAP) sensor from the rear of the intake.

Disconnect the SCPI injector electrical connector, MAP sensor, EVAP canister purge solenoid valve, IAC motor, TP sensor, EGR valve, and ECT sensor.

Remove the accelerator control cable bracket, ignition coil, ICM bracket, and EGR pipe.

Reinstall the cruise control cable (if equipped), the accelerator control cable, refill the cooling system, and install the air cleaner outlet duct to the MAF sensor.