Installation Procedure
Install NEW intake manifold gaskets (1) to the intake manifold.
- Apply a 5 mm (0.20 in) band of threadlock to the threads of the intake manifold bolts. Adhesives, Fluids, Lubricants, and Sealers .
- Remove the covers from the cylinder head passages.
Install the intake manifold (2).
- Install the intake manifold bolts (1) finger tight.
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Courtesy of GENERAL MOTORS COMPANY
CAUTION:Refer to Fastener Caution .
Tighten the intake manifold bolts to specifications.
Tighten
- Tighten the bolts a first pass in the sequence shown to 5 N.m (44 lb in).
- Tighten the bolts a final pass in the sequence shown to 10 N.m (89 lb in).
Connect the engine harness electrical connector (2) to the evaporative emission (EVAP) canister purge solenoid valve.
- Connect the EVAP canister purge tube (1) quick connect fitting to the EVAP canister purge solenoid valve.
Connect the engine harness electrical connector (1) to the throttle actuator.
Install the positive crankcase ventilation (PCV) hose (1). Plastic Collar Quick Connect Fitting Service .
- Install the power brake booster vacuum pipe. Power Brake Booster Vacuum Pipe Replacement (LT1) , or Power Brake Booster Vacuum Pipe Replacement (LT4) .
Connect the engine wiring harness electrical connector (1) to the manifold absolute pressure (MAP) sensor.
- Install the air cleaner outlet duct. Air Cleaner Outlet Duct Replacement (LT1) , or Air Cleaner Outlet Duct Replacement (LT4) .
- Install the upper intake manifold cover. Upper Intake Manifold Cover Replacement .
- Connect the battery ground cable. Battery Negative Cable Disconnection and Connection .
The aid of an assistant may be helpful in holding the engine harness up out of the way so the upper intake manifold cover does not get caught against the engine harness.