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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 238 (Engine Exhaust System) >> Repair Instructions >> Exhaust Crossover Pipe Replacement (3.9L) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Exhaust Crossover Pipe
    GM1679429Courtesy of GENERAL MOTORS CORP.
  1. Install the exhaust crossover pipe seals to the exhaust manifolds.
  2. Install the exhaust crossover pipe (2).
    3. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  3. Install the exhaust crossover pipe nuts (1).

    Tighten:  Tighten the exhaust manifold heat shield bolts to 20 N.m (15 lb ft).

    4. Fig 2: Identifying Exhaust Manifold Heat Shield & Bolts - Left
    GM1679427Courtesy of GENERAL MOTORS CORP.
  4. Install the exhaust crossover heat shield (2).
  5. Install the exhaust crossover heat shield bolts (1).

    Tighten:  Tighten the exhaust manifold heat shield bolts to 10 N.m (89 lb in).

  6. Position the heater pipes back to the original position.
  7. Install the nuts holding the heater pipes on the throttle body.
  8. Connect the heater hoses onto the heater pipes.
  9. Install air cleaner outlet duct. Refer to AIR CLEANER OUTLET DUCT REPLACEMENT .
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