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Exhaust Manifold Installation

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Upper Secondary Air Injection Assembly Studs, Exhaust Manifold Gasket & Studs
    GM2723437Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  1. Install NEW exhaust manifold studs (1) and tighten to 10 N.m (89 lb in).
  2. Install secondary air injection assembly studs (3, 4) and tighten to 10 N.m (89 lb in), if necessary.
  3. Install a NEW exhaust manifold gasket (2).
    4. Fig 2: Secondary Air Injection Check Valve Pipe Adapter & Mounting Components
    GM2723434Courtesy of GENERAL MOTORS COMPANY
  4. Install the secondary air injection check valve pipe adapter (2). Install the nut (3) and tighten to 25 N.m (18 lb ft).
  5. Install the stud-bolt (1) and bolt (4). Tighten the stud-bolt and bolt to 10 N.m (89 lb in).
    6. Fig 3: Secondary Air Injection Check Valve Pipe Adapter & Mounting Components
    GM2723431Courtesy of GENERAL MOTORS COMPANY
  6. Install the second secondary air injection check valve pipe adapter (3). Install the bolts (4) and tighten to 10 N.m (89 lb in).
  7. Install the secondary air injection check valve bracket (2) and the upper nut (1). Tighten the nut (1) to 25 N.m (18 lb ft).
    8. Fig 4: Block Heater & Bolt
    GM2723426Courtesy of GENERAL MOTORS COMPANY
  8. Install the block heater (1). Tighten the bolt to 10 N.m (89 lb in).
    9. Fig 5: Exhaust Manifold & Retaining Nuts
    GM2723421Courtesy of GENERAL MOTORS COMPANY
  9. Install the exhaust manifold (2) to the cylinder head.
  10. Install NEW exhaust manifold to cylinder head retaining nuts (1) finger tight.
    11. Fig 6: Exhaust Manifold Bolt Tightening Sequence
    GM2210038Courtesy of GENERAL MOTORS COMPANY
  11. Tighten the NEW exhaust manifold to cylinder head retaining nuts two passes in sequence:
    1. Tighten first pass in sequence to 14 N.m (124 lb in).
    2. Tighten final pass in sequence to 14 N.m (124 lb in).
    12. Fig 7: Exhaust Manifold Heat Shield & Bolts
    GM2723419Courtesy of GENERAL MOTORS COMPANY
  12. Install the exhaust manifold heat shield (1) and bolts (2). Tighten the bolts to 14 N.m (124 lb in).
    13. Fig 8: Oxygen Sensor
    GM2723418Courtesy of GENERAL MOTORS COMPANY
  13. Coat the threads of the oxygen sensor (1) with anti-seize. Refer to Adhesives, Fluids, Lubricants, and Sealers .
  14. Install the oxygen sensor and tighten to 42 N.m (31 lb ft).
    15. Fig 9: Secondary Air Injection Check Valves, Bolts & Gaskets
    GM2723413Courtesy of GENERAL MOTORS COMPANY
  15. Install a NEW gasket (2) on each of the secondary air injection check valve assemblies (1).
  16. Install the secondary air injection check valve assemblies (1) and bolts (3). Tighten the bolts to 25 N.m (18 lb ft).
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