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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Engine Mechanical - 3.8L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Exhaust Manifold Installation - Right (Without A.I.R.)

Exhaust Manifold Installation - Right (Without A.I.R.)

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    NOTE: When replacing the HO2S perform a code clear with a scan tool, regardless of whether or not a DTC is set. Performing a code clear will reset the HO2S resistance learned value. Failure to perform a code clear may result in an HO2S failure.
  1. Install the exhaust manifold studs.

    Tighten:  Tighten the exhaust manifold studs to 10 N.m (89 lb in).

  2. Fig 1: Removing/Installing Right Exhaust Manifold
    GM683928Courtesy of GENERAL MOTORS CORP.
  3. Install the exhaust manifold gasket.
  4. Fig 2: Right Exhaust Manifold Gasket
    GM1229781Courtesy of GENERAL MOTORS CORP.
  5. Install the exhaust manifold.
  6. Install the exhaust manifold bolts and nuts.

    Tighten:  Tighten the exhaust manifold bolts and nuts to 30 N.m (22 lb ft).

  7. Install the right side spark plugs.

    Tighten: 

    • Tighten the spark plugs to 27 N.m (20 lb ft) when installing the spark plugs in to a new cylinder head.
    • Tighten the spark plugs to 15 N.m (13 lb ft) when re-installing the spark plugs after initial installation.

  8. Install the fuel injector sight shield cover bracket.
  9. Fig 3: Fuel Injector Sight Shield Mounting Bracket
    GM1403426Courtesy of GENERAL MOTORS CORP.
  10. Install the fuel injector sight shield cover bracket nuts.

    Tighten:  Tighten the fuel injector sight shield bracket nuts to 30 N.m (22 lb ft).

  11. Install the right engine lift hook.
  12. Fig 4: Removing/Installing Right Engine Lift Hook Bracket
    GM154526Courtesy of GENERAL MOTORS CORP.
  13. Install the right engine lift hook nut and bolt.

    Tighten:  Tighten the right engine lift hook nut and bolt to 30 N.m (22 lb ft).