Important: During the removal of the fuel injector assembly,
the retainers that hold the injectors into the intake manifold may become worn. This
is OK. Upon installation of the upper intake manifold, the injectors will
be held fully seated, thus keeping them from backing out of the lower intake manifold.
- If reusing the fastener, apply threadlock GM P/N 12345382 (Canadian P/N 10953489)
or equivalent, to the threads of the fuel meter body bracket bolt.
Notice: Refer to Fastener Notice in the Preface section.
- Install the fuel meter body bracket and bolt.
Tighten
Tighten the fuel meter bracket bolt to 10 N·m
(89 lb in).
Important: All injector lines must face forward as the
fuel meter body is snapped into the bracket. Also, the number three fuel tube must
be positioned behind the number one fuel tube to eliminate interference with the upper
intake manifold when installed.
- Install the fuel meter body into the fuel meter body bracket.
- Install the 6 injectors into the proper lower intake manifold
bores in proper sequence (3, 5, 1, 2, 4, 6).
- Inspect the injectors in order to ensure that they are firmly seated and
locked in the lower intake manifold bores.
- Ensure that the electrical connections of the injectors are positioned
so that they do not interfere with each other, and are pointing towards the center
of the intake manifold. Rotate the electrical connector inboard if necessary. Also,
ensure there is no tension on the injector wires.
- Install a NEW upper intake manifold to lower
intake manifold gasket into the groove of the upper intake manifold.
- Install the upper intake manifold onto the lower intake manifold.
- If reusing the fasteners, apply threadlock GM P/N 12345382
(Canadian P/N 10953489) or equivalent, to the threads of the upper
intake manifold attaching studs.
- Install the upper intake manifold attaching studs.
Tighten
- Tighten the upper intake manifold attaching studs on the first pass to
5 N·m (44 lb in).
- Tighten the upper intake manifold attaching studs on the final pass to
9 N·m (80 lb in).
- If reusing the fasteners, apply threadlock
GM P/N 12345382 (Canadian P/N 10953489) or equivalent,
to the threads of the evaporative emission (EVAP) canister purge solenoid valve studs.
- Install the EVAP canister purge solenoid valve and studs.
Tighten
Tighten the EVAP canister purge solenoid valve studs
to 10 N·m (89 lb in).
- Install the engine wiring harness bracket and nut.
Tighten
Tighten the engine wiring harness bracket nut to
12 N·m (106 lb in).
- Install the NEW fuel seals (8),
black O-rings, into the fuel meter body.
- Install the NEW spacer rings (7), flat washers, into the fuel meter
body.
- Install the NEW fuel seals (6), yellow O-rings, into the
fuel meter body.
- Install the NEW fuel seal retainers (5) into the fuel meter body.
- Install the fuel pipe (3) into the fuel meter body.
- Install the fuel pipe retainer bracket (2) onto the fuel pipe.
- Install the fuel pipe retainer bracket nuts (1).
- If reusing the fastener, apply threadlock GM P/N 12345382
(Canadian P/N 10953489) or equivalent, to the threads of the fuel pipe
bolt.
- Install the fuel pipe bolt (4).
Tighten
- Tighten the fuel pipe bracket nuts to 3 N·m (27 lb in).
- Tighten the fuel pipe bolt to 6 N·m (53 lb in).
- Install a NEW manifold absolute pressure
(MAP) sensor seal onto the MAP sensor.
- Apply a small amount, approximately 1 drop, of clean engine oil
to the MAP sensor seal.
- Install the MAP sensor into the upper intake manifold.
- Install the ignition coil and studs.
Tighten
Tighten the ignition coil studs to 12 N·m
(106 lb in).
- If reusing the engine coolant temperature
(ECT) sensor plug (1) or the ECT sensor (2), if equipped, apply sealant
GM P/N 12346004 (Canadian P/N 10953480) or equivalent,
to the threads of the ECT sensor plug (1) or the ECT sensor (2).
- Install the ECT sensor or plug, if equipped, into the front of the lower
intake manifold.
Tighten
Tighten the ECT sensor or plug to 20 N·m
(15 lb ft).
- Install the engine coolant thermostat.
- Install the water outlet (1 or 2).
- Install the water outlet studs.
Tighten
Tighten the water outlet studs to 25 N·m
(18 lb ft).
- Install a NEW throttle body gasket into the groove in the upper intake manifold.
- Install the throttle body onto the upper intake manifold.
- If reusing the fasteners, apply threadlock GM P/N 12345382 (Canadian P/N 10953489)
or equivalent, to the threads of the throttle body attaching studs.
- Install the throttle body attaching studs.
Tighten
Tighten the throttle body attaching studs to 9 N·m
(80 lb in).
- Install the accelerator control cable bracket,
the studs, and the nuts.
Tighten
- Tighten the accelerator control cable bracket stud to the intake manifold
to 6 N·m (53 lb in).
- Tighten the accelerator control cable bracket nuts to 12 N·m
(106 lb in).
- Tighten the accelerator control cable bracket stud to the throttle body
to 12 N·m (106 lb in).