Intake Manifold Installation

Important:  The intake manifold, throttle body, fuel injection rail and fuel injectors may be removed as an assembly. If not servicing the individual components, install the intake manifold as a complete assembly.

DO NOT use intake manifold gaskets again.

Install NEW intake manifold-to-cylinder head gaskets.

1. Install NEW intake manifold-to-cylinder head gaskets (1).
   Fig 1: Installing Intake Manifold-To-Cylinder Head Gaskets

   Courtesy of GENERAL MOTORS CORP.
2. Install the intake manifold to the engine.
   Fig 2: Installing Intake Manifold To Engine

   Courtesy of GENERAL MOTORS CORP.
3. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the intake manifold bolts (1). Refer to Sealers, Adhesives, And Lubricants Specifications .
4. Install the fuel rail stop bracket (2).
   Fig 3: Installing Fuel Rail Stop Bracket

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Refer to FASTENER NOTICE .
5. Install the manifold bolts.
   Fig 4: Identifying Manifold Bolts Tightening Sequence

   Courtesy of GENERAL MOTORS CORP.

   Tighten 

   1. 5.1. Tighten intake manifold bolts a first pass in sequence to 5 N.m (44 lb in).
   2. 5.2. Tighten intake manifold bolts a final pass in sequence to 10 N.m (89 lb in).
6. Install the knock sensor wire harness connector (1) onto the fuel rail stop bracket (2).
   Fig 5: Installing Knock Sensor Wire Harness Connector

   Courtesy of GENERAL MOTORS CORP.
7. Note the location of the fuel rail ground strap (1) on the intake manifold.

   The fuel rail ground strap must be installed during assembly.

   Fig 6: Locating Fuel Rail Ground Strap On Intake Manifold

   Courtesy of GENERAL MOTORS CORP.
8. Install the manifold absolute pressure (MAP) sensor, if previously removed.
   Fig 7: Installing Manifold Absolute Pressure Sensor

   Courtesy of GENERAL MOTORS CORP.
9. Install the positive crankcase ventilation (PCV) valve pipe to the right rocker cover and intake manifold-LS1.
10. Install the PCV strap and nut onto the right front vapor vent pipe stud - LS1.
    Fig 8: Installing PCV Strap And Nut Onto Right Front Vapor Vent Pipe Stud - LS1

    Courtesy of GENERAL MOTORS CORP.

    Tighten 

    Tighten the PCV strap nut to 12 N.m (106 lb in).

11. Install the PCV valve pipe (1) to the valley cover and intake manifold - LS6.
    Fig 9: Installing PCV Valve Pipe To Valley Cover And Intake Manifold - LS6

    Courtesy of GENERAL MOTORS CORP.
12. Install the PCV valve pipe to the left rocker cover.
    Fig 10: Installing PCV Valve Pipe To Left Rocker Cover

    Courtesy of GENERAL MOTORS CORP.