Intake Manifold Installation - Lower Buick Century VI

Scheme 439

Scheme 440

Scheme 441

Scheme 442

Scheme 443

1. Install the lower intake manifold gaskets.
2. With gaskets in place apply a small drop 8-10 mm (0.31-0.39 in) of RTV sealer GM P/N 12346286 (Canadian P/N 10953472) or equivalent to the 4 corners of the intake manifold to block joint (1).
3. Connect the 2 small drops with a bead of RTV sealer that is between 8-10 mm (0.31-0.39 in) wide and 3.0-5.0 mm (0.12-0.20 in) thick (2).
4. Install the lower intake manifold. NOTE: Failure to tighten vertical bolts before the diagonal bolts may cause an oil leak.
5. Apply sealer GM P/N 12345382 (Canadian P/N 10953489) or the equivalent to the lower intake manifold bolt threads. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
6. Install the lower intake manifold bolts. Tighten See TSB For Revised Lower Intake Torque
7. Install the heater inlet pipe.
8. Install the heater inlet pipe nut. Tighten Tighten the heater inlet pipe nut to 25 N.m (18 lb ft). IMPORTANT: Do not press on the fuel pressure regulator valve when installing the fuel injector rail assembly.
9. Install the fuel injector rail assembly. 9.1. Install the fuel injector O-rings using GM P/N 12345616 (Canadian P/N 993182) or the equivalent. 9.2. Install the injector nozzles into the lower intake manifold injector bores. 9.3. Press on the injector rail using the palms of both hands until the injectors are fully seated.
10. Install the fuel injector rail bolts. Tighten Tighten the fuel injector rail bolts to 10 N.m (89 lb in).
11. Install the fuel feed and return pipe retaining clip.
12. 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).

Scheme 444

Scheme 445

Scheme 446

Scheme 447

1. Install the upper intake manifold gaskets.
2. Install the upper intake manifold. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
3. Install the upper intake manifold bolts and studs. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) to the threads. Tighten Tighten the upper intake manifold bolts and studs to 25 N.m (18 lb ft).
4. Install the EGR valve pipe and bolt to the EGR. Tighten Tighten the EGR valve pipe bolt to 25 N.m (18 lb ft).
5. Install the EGR valve.
6. Install the EGR valve bolts. Tighten Tighten the EGR valve bolts to 25 N.m (18 lb ft).
7. Install the map sensor bracket and bolts. Tighten Tighten the MAP sensor bracket bolts to 25 N.m (18 lb ft).
8. Install the MAP sensor.
9. Install the MAP sensor bolts. Tighten Tighten the MAP sensor bolts to 5 N.m (44 lb in).
10. Install the MAP sensor electrical connector.
11. Install the vacuum lines to the upper intake manifold.
12. Install the throttle cable bracket.
13. Install the throttle cable bracket bolts. Tighten Tighten the throttle cable bracket bolts to 13 N.m (115 lb in).

Scheme 448

1. Install the valve rocker arm cover gasket into the valve rocker arm cover.
2. Apply sealer GM P/N 12346286 (Canadian P/N 10953472) or the equivalent to the notches where the cylinder head and intake manifold meet.
3. Install the valve rocker arm cover. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
4. Install the valve rocker arm cover bolts. Tighten Tighten the valve rocker arm cover bolts to 10 N.m (89 lb in).

Scheme 449

Scheme 450

Scheme 451

1. Install the valve rocker arm cover gasket into the valve rocker arm cover.
2. Apply sealer GM P/N 12346286, (Canadian P/N 10953472) or the equivalent to the notches where the cylinder head and intake manifold meet.
3. Install the valve rocker arm cover. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
4. Install the valve rocker arm cover bolts. Tighten Tighten the valve rocker arm cover bolts to 10 N.m (89 lb in).
5. Install the vacuum lines from the upper intake manifold.
6. Install the ignition coil studs. Tighten Tighten the ignition coil studs to 25 N.m (18 lb ft).
7. Install the electronic ignition control module.
8. Install the electronic ignition control module nuts and bolts. Tighten Tighten the electronic ignition control module nuts and bolts to 25 N.m (18 lb ft).

Scheme 452

Scheme 453

1. Install the thermostat.
2. Install the water outlet. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices.
3. Install the water outlet bolts. Tighten Tighten the water outlet bolts to 25 N.m (18 lb ft).