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 use the exhaust gas recirculation (EGR) valve and pipe gaskets or seals again during assembly. Install NEW gaskets and O-ring seal.

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.
   CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
3. 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 two 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 two bolts. Alternate from side-to-side, and work toward the outside bolts.
   Fig 1: Installing Exhaust Manifold Gasket, Exhaust Manifold & Bolts

   Courtesy of GENERAL MOTORS CORP.
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: Installing Heat Shield & Bolts

   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: Installing O-Ring Seal & EGR Pipe

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

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

    Tighten 

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

       Courtesy of GENERAL MOTORS CORP.