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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1054 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Right (4.3L Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the exhaust manifold heat shield, if required.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 1: Exhaust Manifold Heat Shield (4.3L Engine)
    GM493851Courtesy of GENERAL MOTORS CORP.
  2. Install the exhaust manifold heat shield bolts.

    Tighten:  Tighten the bolts to 9 N.m (80 lb in).

    3. Fig 2: Identifying Tabs On A NEW Exhaust Manifold Gasket (4.3L Engine)
    GM476818Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: To assist in installing the exhaust manifold and gasket to the engine, tabs on a NEW exhaust manifold gasket will hold the gasket and bolts in place.
  3. Install NEW exhaust manifold gaskets to the exhaust manifold.
  4. Ensure that the exhaust manifold bolts, and plug wire shields are held in place by the tabs on the exhaust manifold gaskets.
    5. Fig 3: Exhaust Manifold And Spark Plug Heat Shield (4.3L Engine)
    GM188121Courtesy of GENERAL MOTORS CORP.
  5. Install the exhaust manifold and plug wire shields.
  6. If reusing the old fasteners, apply threadlock GM P/N 12345493, (Canadian P/N 10953488), or equivalent to the threads of the exhaust manifold bolts.
  7. Install the exhaust manifold bolts.

    Tighten:  Tighten the bolts to 30 N.m (22 lb ft).

    8. Fig 4: View Of Spark Plug And Sparkplug Seat
    GM14824Courtesy of GENERAL MOTORS CORP.
  8. Install the spark plugs.
  9. Position the spark plug wire retainer to the engine.
  10. Loosely install the spark plug wire retainer bolt.
  11. Connect the spark plug wires to the spark plugs.
  12. Install the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement in Engine Mechanical - 4.3L.
  13. Tighten the spark plug wire retainer bolt.

    Tighten:  Tighten the bolt to 12 N.m (106 lb in).

    14. Fig 5: View Of Air Cleaner Outlet Duct
    GM489176Courtesy of GENERAL MOTORS CORP.
  14. Align the hinge clip with the lip on the throttle body.

    In order to install the air cleaner outlet duct, pivot the air cleaner outlet duct downward until the mounting stud is through the hole.

    15. Fig 6: View Of Air Cleaner Adapter Nut
    GM489179Courtesy of GENERAL MOTORS CORP.
  15. Install the air cleaner adapter nut.
    16. Fig 7: Positive Crankcase Ventilation (PCV) Hose (4.3L Engine)
    GM701705Courtesy of GENERAL MOTORS CORP.
  16. Install the PCV hose.
    17. Fig 8: View Of Air Cleaner Outlet Duct Clamp
    GM360851Courtesy of GENERAL MOTORS CORP.
  17. Tighten the air cleaner outlet duct clamp at the MAF/IAT sensor.
  18. Raise the vehicle.
    19. Fig 9: View Of Right Exhaust Pipe Nuts
    GM858553Courtesy of GENERAL MOTORS CORP.
  19. Install the right exhaust manifold pipe nuts.

    Tighten:  Tighten the nuts to 50 N.m (37 lb ft).

  20. Lower the vehicle.
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