GM Service Manual Online
For 1990-2009 cars only

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 895095  Size: SH
  1. Install new exhaust manifold studs.
  2. Tighten
    Tighten the exhaust manifold studs-to-cylinder head to 10 N·m (89 lb in).


    Object Number: 895182  Size: SH
  3. Install the new exhaust manifold gasket.
  4. Install the exhaust manifold to the cylinder head.
  5. Install the exhaust manifold to cylinder head retaining nuts. Tighten the nuts starting from the center and working outward.
  6. Tighten
    Tighten the exhaust manifold-to-cylinder head nuts to 12 N·m (9 lb ft).


    Object Number: 895176  Size: SH
  7. Coat the threads of the oxygen sensor with anti-seize compound P/N 12397953.
  8. Install the oxygen sensor.
  9. Tighten
    Tighten the oxygen sensor bolts to 30 N·m (22 lb ft).


    Object Number: 898894  Size: SH
  10. Install the engine block heater, if equipped.
  11. Tighten
    Tighten the engine block heater bolt to 10 N·m (89 lb in).


    Object Number: 895179  Size: SH
  12. Install the exhaust manifold heat shield.
  13. Install the exhaust manifold heat shield bolts.
  14. Tighten
    Tighten the exhaust manifold heat shield bolts to 23 N·m (17 lb ft).


    Object Number: 897651  Size: SH
  15. Install the air pipe gasket (4).
  16. Install the air pipe (2).
  17. Install the air pipe bolts (3).
  18. Tighten
    Tighten the air pipe bolts to 25 N·m (18 lb ft).

  19. Install the air pipe nut (1).
  20. Tighten
    Tighten the air pipe nut to 16 N·m (11 lb ft).