Exhaust Manifold Installation - Left (w/o RPO NC1 or NF7)

Important:  Align the threaded hole in the engine block with the hole labeled L (2) on the left coolant heater.

1. Install the left engine coolant heater.
   Fig 1: Identifying Left Coolant Heater Markings

   Courtesy of GENERAL MOTORS CORP.
   CAUTION: Refer to in FASTENER NOTICE .
2. Install the left engine coolant heater bolt.

   Tighten 

   Tighten the left coolant heater bolt to 9 N.m (80 in lbs).

   Fig 2: Installing Left Engine Coolant Heater

   Courtesy of GENERAL MOTORS CORP.

   Important:  Installing the exhaust manifold/crossover pipe assembly with the engine on an engine stand is difficult. Remove the engine from the engine stand and install the exhaust manifold with the engine properly supported on the floor or on a bench.

   Important:  You must install a NEW crossover flange gasket.

3. Install a NEW manifold to crossover flange gasket onto the left exhaust manifold flange.
4. Position a NEW exhaust manifold gasket onto the left exhaust manifold.
5. Install the exhaust manifold bolts into the left exhaust manifold.
6. Install the left exhaust manifold to the crossover pipe from the right exhaust manifold and up to the left cylinder head.
   CAUTION: Refer to in FASTENER NOTICE .
7. Install the exhaust manifold bolts into the left cylinder head.

   Tighten 

   Tighten the exhaust manifold bolts to 25 N.m (18 ft lbs).

8. Install the left exhaust manifold to crossover pipe flange bolts.

   Tighten 

   Tighten the left exhaust manifold to crossover flange bolts to 25 N.m (18 ft lbs).

   Fig 3: Installing Left Exhaust Manifold & Gasket

   Courtesy of GENERAL MOTORS CORP.
9. Place the exhaust manifold heat shield in position.
10. Install the exhaust manifold heat shield bolts.

    Tighten 

    Tighten the exhaust manifold heat shield bolts to 9 N.m (80 in lbs).

    Fig 4: Installing Exhaust Manifold Heat Shield

    Courtesy of GENERAL MOTORS CORP.