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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 - Left (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.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 1: Exhaust Manifold Heat Shield (4.3L Engine)
    GM493850Courtesy of GENERAL MOTORS CORP.
  1. Install the exhaust manifold heat shield and bolts, if required.

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

    2. 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.
  2. Install NEW exhaust manifold gaskets to the exhaust manifold.
  3. Ensure that the exhaust manifold bolts/stud, and plug wire shields are held in place by the tabs on the exhaust manifold gaskets.
    4. Fig 3: Exhaust Manifold And Spark Plug Wire Shield Bolts/Stud (4.3L Engine)
    GM188045Courtesy of GENERAL MOTORS CORP.
  4. Install the exhaust manifold and plug wire shields.
  5. 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/stud.
  6. Tighten the exhaust manifold bolts/stud.

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

    7. Fig 4: View Of TP Sensor, IAC Motor, ECT Sensor, Control Port Injector Module & Engine Harness Clip Bolt
    GM782174Courtesy of GENERAL MOTORS CORP.
  7. Connect the ECT sensor electrical connector (5).
    8. Fig 5: View Of Spark Plug And Sparkplug Seat
    GM14824Courtesy of GENERAL MOTORS CORP.
  8. Install the spark plugs.

    Tighten:  Tighten the plugs to 15 N.m (11 lb ft).

    9. Fig 6: View Of Spark Plug Wire Retaining Bracket
    GM317450Courtesy of GENERAL MOTORS CORP.
  9. Position the wire harness to the engine.
  10. Install the spark plug wire retainer bolts.

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

  11. Connect the spark plug wires to the spark plugs.
  12. Raise the vehicle.
    13. Fig 7: View Of Left Exhaust Manifold Pipe & Nuts
    GM858550Courtesy of GENERAL MOTORS CORP.
  13. Install the exhaust manifold pipe nuts.

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

  14. Lower the vehicle.
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