Lower Intake Manifold Replacement

LOWER INTAKE MANIFOLD ASSEMBLY





Remove or Disconnect
1. Upper intake manifold assembly.
- Refer to "Upper Intake Manifold Assembly".
2. Valve rocker arm cover assemblies.
- Refer to "Valve Rocker Arm Cover Assemblies".

3. Upper radiator hose from lower intake manifold assembly (142).
4. Heater hose from lower intake manifold assembly (142).
5. Wiring harness ground leads.
6. Manifold bolts/screws (144) and nuts (143).
7. Lower intake manifold assembly (142) and gaskets (141).



Install or Connect
1. Gaskets(141).
2. Apply sealant GM PIN 12345739 at engine block to manifold mating surface. Bead should be 2.0 - 3.0 mm (008 - 0.12 inch) wide and 3.0 - 5.0 mm (0.12 - 0.20 inch) thick.

3. Lower intake manifold assembly (142).
4. Manifold bolts/screws (144) and nuts (143).
- Tighten Manifold bolts/screws (144) and nuts (143) to 30 N.m (22 lb. ft.).

5. Wiring harness ground leads.
6. Heater hose.
7. Upper radiator hose.
8. Valve rocker arm cover assemblies.
- Refer to Valve Rocker Arm Cover Assemblies".
9. Upper intake manifold assembly.
- Refer to Upper Intake Manifold Assembly".