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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1783 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Left (8.1L Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install a NEW exhaust manifold gasket.
  2. Install the exhaust manifold.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  3. Install the exhaust manifold bolt and nuts.

    Tighten 

    • Tighten the bolt to 35 N.m (26 lb ft).
    • Tighten the nuts to 16 N.m (12 lb ft).
  4. Raise the vehicle.
    Fig 1: Installing Exhaust Manifold, Gasket, Bolt & Nuts - Left (8.1L)
    G02133467Courtesy of GENERAL MOTORS CORP.
  5. Install the exhaust manifold heat shield.
  6. Install the exhaust manifold heat shield bolts and nuts.

    Tighten 

    Tighten the bolts and nuts to 25 N.m (18 lb ft).

  7. Lower the vehicle.
  8. Install the spark plugs. Refer to SPARK PLUG .
    Fig 2: Installing Exhaust Manifold Heat Shield, Bolts & Nuts - Left (8.1L)
    G02133468Courtesy of GENERAL MOTORS CORP.

    Important:  Fully install the spark plug wire by pushing on the exposed end of the spark plug boot. Do not push the spark plug wire on to the spark plug by using the metal heat shield.

  9. Install the spark plug wires to the spark plugs and ignition coils.
  10. Install the wheelhouse panel. Refer to WHEELHOUSE PANEL REPLACEMENT in Body Front End.
    Fig 3: Installing Spark Plug Wires - Left (8.1L)
    G02133469Courtesy of GENERAL MOTORS CORP.
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