Exhaust Manifold Installation - Right

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.
• Do not reuse Exhaust Gas Recirculation (EGR) valve and pipe gaskets or seals during assembly. Install NEW gaskets and O-ring seal.

1. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N United States 12345493, GM P/N Canada 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.
   Fig 1: Right Exhaust Manifold, Gasket & Bolt

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
3. Install the exhaust manifold bolts.

   Tighten 

   1. 3.1. Tighten the exhaust manifold bolts first pass to 15 N.m (11 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
   2. 3.2. Tighten the exhaust manifold bolts final pass to 25 N.m (18 lb ft). Tighten the exhaust manifold bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
4. Using a flat punch, bend over the exposed edge of the exhaust manifold gasket at the front of the right cylinder head.
5. Install the heat shield (2) and bolts (3).

   Tighten 

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

   Fig 2: Right Exhaust Manifold, Heat Shield & Bolt

   Courtesy of GENERAL MOTORS CORP.
6. Apply a light coating of clean engine oil to a NEW O-ring seal (1) and install the seal onto the EGR pipe (2), if applicable.
7. Insert the EGR pipe into the intake manifold.
   Fig 3: EGR Pipe & Bolts

   Courtesy of GENERAL MOTORS CORP.
8. Start the EGR pipe to intake manifold bolt (1).

   Do not tighten the bolt at this time.

9. Install the EGR pipe to cylinder head bolts.

   Do not tighten the bolts at this time.

   Fig 4: EGR Pipe-To-Intake Manifold Bolt

   Courtesy of GENERAL MOTORS CORP.
10. Install a NEW EGR pipe exhaust manifold gasket and bolts (1).

    Tighten 

    1. 10.1. Tighten the EGR pipe to intake manifold bolt to 10 N.m (89 lb in).
    2. 10.2. Tighten the EGR pipe to cylinder head bolts to 50 N.m (37 lb ft).
    3. 10.3. Tighten the EGR pipe to exhaust manifold bolts to 30 N.m (22 lb ft).
    Fig 5: EGR Pipe Exhaust Manifold Gasket & Bolt

    Courtesy of GENERAL MOTORS CORP.
11. Install the EGR valve, a NEW gasket, and bolts.

    Tighten 

    1. 11.1. Tighten the EGR valve bolts a first pass to 10 N.m (89 lb in).
    2. 11.2. Tighten the EGR valve bolts a second pass to 25 N.m (18 lb ft).
    Fig 6: EGR Valve, Gasket & Bolt

    Courtesy of GENERAL MOTORS CORP.