59. Intake Manifold Assemble - Lower

Intake Manifold Assemble (Lower)





Notice: Refer to Fastener Notice in Cautions and Notices.

1. Install the ECT sensor hole plug (2), if removed.

Tighten the ECT sensor hole plug to 15 Nm (11 lb ft).

2. Install the engine coolant air bleed fitting (1), if removed.

Tighten the engine coolant air bleed fitting to 15 Nm (11 lb ft).




3. Install the thermostat bypass fitting, if removed.

Tighten the thermostat bypass fitting to 15 Nm (11 lb ft).




4. Install the thermostat.
5. Install the coolant outlet housing.
6. Install the coolant outlet housing bolts.

Tighten the coolant outlet housing bolts to 40 Nm (30 lb ft).





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


7. Install the fuel rail assembly into the intake manifold. Tilt the rail assembly to install the injectors.
8. Install the fuel rail bolts and stud.

* Tighten the fuel rail bolts to 10 Nm (89 lb in).
* Tighten the fuel rail stud to 25 Nm (18 lb ft).




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 lb ft).