62. Intake Manifold Assemble - Lower

Notice: Refer to Fastener Notice in Service Precautions.





1. Install the ECT sensor using sealant GM P/N 12346004 or equivalent, if removed.
^ Tighten the ECT sensor to 20 Nm (15 ft. lbs.).





2. Install the thermostat bypass hose fitting using sealant GM P/N 12346004 or equivalent, if removed.
^ Tighten the thermostat bypass hose fitting to 15 Nm (11 ft. lbs.).





3. Install the thermostat and NEW thermostat seal.
4. Install the coolant outlet housing.
5. Install the coolant outlet housing bolts.
^ Tighten the coolant outlet housing bolts to 40 Nm (30 ft. lbs.).





Important: Lubricate the injector O-ring seals with clean engine oil and install onto the spray tip end of each injector.

6. Install the fuel rail assembly in intake manifold. Tilt the rail assembly to install the injectors.
7. Install the fuel rail stud (1) and bolts (2, 3).
^ Tighten the fuel rail stud (1) to 25 Nm (18 ft. lbs.).
^ Tighten the fuel rail bolts (2, 3) to 10 Nm (89 inch lbs.).





8. Connect the fuel injector regulator vacuum hose connection to the intake manifold fitting,





9. Apply lubricant GM P/N 9985770 or equivalent to the MAP sensor seal.

Important: Position the MAP sensor correctly in order to ensure proper clearance for the wiring harness connector.

10. Install the MAP sensor.
11. Install the MAP sensor retainer.
12. Install the MAP sensor retainer nut.
^ Tighten the MAP sensor retainer nut to 25 Nm (18 ft. lbs.).