Upper Intake Manifold

UPPER INTAKE MANIFOLD










Install or Connect
1. Upper intake manifold gasket (154) and manifold (155).
2. Upper intake manifold bolts (156).
- Tighten Upper intake manifold bolts (156) to 25 Nm (18 lb. ft.).

3. MAP sensor electrical connector.
4. EGR flexible adapter pipe gasket (213), pipe and bolts (212) at upper manifold (155).
- Gasket must be installed with text "tube side" facing the pipe.
- Apply teflon sealant GM p/n 1052080 to threads of bolts (212).
- Tighten EGR flexible adapter pipe bolts to 26 N.m (19 lb. ft.).

5. PCV valve (190).

Important: Do not press on the regulator cover or piedmont valve when installing fuel injector rail assembly.

6. Fuel injector rail assembly (166).
A. Lightly lubricate fuel injector 0-rings with engine oil.
B. Install injectors of fuel rail assembly into bores of manifold.
C. Carefully press on injector rail (166) with palms of both hands until injectors are fully seated.

7. Fuel rail stud (169).
- Tighten Fuel rail stud (169) to 25 Nm (18 lb. ft.).

8. Coolant sensor electrical connector.
9. Fuel pressure regulator vacuum hose (173).
10. Fuel injection harness retaining nut.
11. Fuel lines (175) to fuel injection rail (166).
- Slide fuel line hold down plate (168) over fuel lines.

12. Fuel line hold down plate bolt (167).
- Apply teflon sealant GM p/n 1052080 to threads of bolt (167).
- Tighten Bolt (167) to 25 N.m (18 lb. ft.).

13. Fuel line clamp bolts (176 and 177).