GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2008 🢒 G5 🢒 Engine 🢒 Engine Mechanical - 2.4L 🢒 Exhaust Manifold Installation

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 412550 Size: SH
  1. Install new exhaust manifold studs.

    2. Tighten
    Tighten the studs to 10 N·m (89 lb in).


    Object Number: 746061 Size: SH
  2. Install the exhaust manifold gasket.
  3. Install the exhaust manifold to the cylinder head.
  4. Install NEW exhaust manifold to cylinder head retaining nuts finger tight.

    5. Object Number: 1340643 Size: SH
  5. Tighten the NEW exhaust manifold to cylinder head retaining nuts in sequence.

    6. Tighten
    Tighten the nuts a second time to 14 N·m (124 lb in).


    Object Number: 1867005 Size: SH
  6. Coat the threads of the oxygen sensor with antiseize GM P/N 12397953 or equivalent.
  7. Install the oxygen sensor.

    8. Tighten
    Tighten the oxygen sensor to 42 N·m (31 lb ft).


    Object Number: 1867003 Size: SH
  8. Install the exhaust manifold heat shield.
  9. Install the exhaust manifold heat shield bolts.

    10. Tighten
    Tighten the bolts to 22 N·m (16 lb ft).