76. Intake Manifold Installation

Intake Manifold Installation





1. Install the splash shield.





2. Ensure the splash shield (2) snap fits between the cylinder heads (1).





3. Apply a 5 mm (0.2 inch) bead of GM P/N 12346141 (Canadian P/N 10953433) sealer (1) to the 4 engine block/cylinder head locations.





4. Install the new intake manifold end seals.





5. Apply a 5 mm (0.2 inch) bead of GM P/N 12346141 (Canadian P/N 10953433) sealer (1) onto the end seals at the 4 engine block/cylinder head locations.





6. Install the new intake manifold side gaskets onto the cylinder heads.





7. Ensure the intake manifold gasket tabs align with the hole in the head gasket.
8. Ensure the intake manifold gasket tabs align with the slot in the intake manifold end seals.





9. Install the intake manifold onto the engine block.





10. Notice: Ensure the intake manifold does not shift as the intake manifold bolts are tightened in the proper sequence. Failure to follow the entire intake manifold bolt tightening sequence exactly, may result in an oil leak and serious engine damage.

Important: The entire intake manifold tightening sequence must be promptly completed due to the anaerobic thread adhesive. The final pass of the tightening sequence must be completed before the adhesive starts to cure, or false torque readings and ineffective thread locking may result.

Important: DO NOT reuse intake manifold bolts. Install NEW intake manifold bolts during assembly.

Install the NEW intake manifold bolts.

11. Notice: Refer to Fastener Notice in Service Precautions.

Tighten the intake manifold bolts in sequence, using 4 passes.
1. Tighten the intake manifold bolts a first pass in sequence to 5 Nm (44 lb in).
2. Tighten the intake manifold bolts a second pass in sequence to 8 Nm (71 lb in). Inspect the intake manifold joints for signs of intake manifold shifting. Correct as required.
3. Tighten the intake manifold bolts a third pass in sequence to 12 Nm (106 lb in).
4. Tighten the intake manifold bolts a final pass in sequence to 15 Nm (11 lb ft).





12. Important: Lubricate the injector O-ring seals with clean engine oil and install onto the spray tip end of each injector.

Install the fuel injection fuel rail with injectors.
13. Install the fuel injection fuel rail bolts/studs.
Tighten the fuel injection fuel rail bolts/studs to 12 Nm (106 lb in).





14. Install the throttle body gasket (501) and throttle body (502).
15. Install the throttle body nuts (503).
Tighten the throttle body nuts to 10 Nm (89 lb in).





16. Install the vacuum plug (513).