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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Mechanical - 4.8L, 5.3L, And 6.0L (4 Of 4)) >> Off-Vehicle Repair Instructions (3 Of 3) >> Exhaust Manifold Installation - Right Side

Exhaust Manifold Installation - Right Side

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Exhaust Manifold & Gasket (Right)
    GM823317Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Tighten the exhaust manifold bolts, as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect vehicle emissions and/or on-board diagnostic (OBD) II system performance.
    • The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or threadlocking material.
  1. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent, to the threads of the exhaust manifold bolts. Refer to Sealers, Adhesives, and Lubricants .
  2. Install the exhaust manifold gasket and exhaust manifold.
  3. NOTE: Refer to Fastener Notice .
  4. Install the exhaust manifold bolts.

    Tighten: 

    1. Tighten the exhaust manifold bolts first pass to 15 N.m (11 lb ft). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side-to-side, and work toward the outside bolts.
    2. Tighten the exhaust manifold bolts final pass to 25 N.m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center 2 bolts. Alternate from side-to-side, and work toward the outside bolts.

  5. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the front of the right cylinder head.
  6. Fig 2: View Of Exhaust Manifold Heat Shield & Bolts (Right)
    GM1277090Courtesy of GENERAL MOTORS CORP.
  7. Install the heat shield (603) and bolts (604).

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