- Install the thermostat.
- Install the water outlet.
Notice: Refer to Fastener Notice in the Preface section.
- Install the water outlet bolts.
Tighten
Tighten the bolts to 25 N·m (18 lb ft).
- Install the ECT sensor.
Tighten
Tighten the sensor to 23 N·m (17 lb ft).
Important: All gasket-mating surfaces need to be free of oil, and foreign material. Use
GM P/N 12346139 (Canadian P/N 10953463) or equivalent
to clean surfaces.
- Install the lower intake manifold gaskets.
- With gaskets in place apply a small drop 8-10 mm (0.31-0.39 inch)
of RTV Sealer GM P/N 12346141 (Canadian P/N 10953433)
or equivalent to the 4 corners of the intake manifold to block joint (1).
- Connect the 2 small drops with a bead of RTV Sealer that is between
8-10 mm (0.31-0.39 inch) wide and 3.0-5.0 mm
(0.10.20 inch) thick (2).
- Install the valve rocker arms and pushrods. Refer to
Valve Rocker Arm and Push Rod Replacement
.
- Install the lower intake manifold .
Notice: Refer to Fastener Notice in the Preface section.
Important: All lower intake manifold bolts need to be cleaned, free of any foreign material,
and reused only if new bolts are unavailable. Use GM P/N 12345382 (Canadian P/N 10953489)
or equivalent and apply to the old intake manifold bolt threads.
Important: Manufacturer recommends the center bolts be fully torqued before the diagonal
bolts to assure proper seal ability.
Important: Lower intake manifold bolts in location 6 and 7 should be torqued
to specification using a crows foot type tool.
- Install the lower intake manifold bolts.
Tighten
- Tighten the lower intake manifold bolts in sequence to 7 N·m
(62 lb in) on the first pass.
- Tighten the lower intake manifold bolts (1,2,3,4) in sequence to
13 N·m (115 lb in) on the final pass.
- Tighten the lower intake manifold bolts (5,6,7,8) in sequence to 25 N·m
(18 lb ft) on the final pass.
- Install the thermostat bypass hose to the
thermostat bypass pipe and lower intake manifold pipe.
- Install the heater inlet pipe.
- Install the heater inlet pipe nut.
Tighten
Tighten the heater inlet pipe nut to 25 N·m (18 lb ft).
- Install the radiator inlet hose to the engine. Refer to
Radiator Inlet Hose Replacement
in Engine Cooling.
- Install the power steering pump to the front engine cover. Refer to
Power Steering Pump Replacement
in Power Steering System.
Important: Do not press on the fuel pressure regulator valve when installing the fuel injector
rail assembly.
- Install the fuel injector rail assembly.
16.1. | Install the fuel injector O-rings using GM P/N 12345616
(Canadian P/N 993182) or equivalent. |
16.2. | Install the injector nozzles into the lower intake manifold injector bores. |
16.3. | Press on the injector rail using the palms of both hands until the injectors
are fully seated. |
- Install the fuel injector rail bolts.
Tighten
Tighten the fuel injector rail bolts to 10 N·m (89 lb in).
- Install the fuel return pipe to the fuel injector rail. Refer to
Fuel Hose/Pipes Replacement - Filter to Engine
in Engine
Controls - 3.1L.
- Install the fuel feed pipe to the fuel injector rail. Refer to
Fuel Hose/Pipes Replacement - Filter to Engine
in Engine Controls - 3.1L.
- Install the fuel feed and return pipe retaining
clip.
- Install the fuel feed and return pipe retaining clip bolt.
Tighten
Tighten the fuel feed and return pipe retaining clip bolt to 8 N·m
(71 lb in).
- Install and connect the fuel injector and
the MAP sensor wiring harnesses.
- Connect the ECT sensor electrical connector.
- Install the right valve rocker arm cover. Refer to
Valve Rocker Arm Cover Replacement - Right Side
.
- Install the left valve rocker arm cover. Refer to
Valve Rocker Arm Cover Replacement - Left Side
.
- Install the upper intake manifold. Refer to
Upper Intake Manifold Replacement
.
- Connect the negative battery cable. Refer to
Battery Negative Cable Disconnection and Connection
in Engine Electrical.
- Inspect for leaks.