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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 639 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Pipe Replacement - Front (L47) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the rear exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement - Rear (L47) .
  2. Remove the transaxle assembly. Refer to TRANSAXLE (4T80-E) .
  3. Remove the two bolts attaching the left exhaust manifold to the front exhaust manifold pipe.
    Fig 1: Removing Left Exhaust Manifold To Front Exhaust Manifold Pipe Bolts
    G01818220Courtesy of GENERAL MOTORS CORP.
  4. Remove the bolt (1) securing the front exhaust manifold pipe (2) to the crankcase.
  5. Remove the nut securing the coil cassette ground wire to the cylinder head.
  6. Remove the bolt (3) securing the front exhaust manifold pipe (2) to the cylinder head.

    Important:  The EGR valve inlet pipe incorporates a crush seal connection at the water crossover. The EGR valve inlet pipe must be replaced if disconnected from the water crossover.

  7. Disconnect the EGR inlet pipe nut from the front exhaust manifold pipe (2).
  8. Remove the front exhaust manifold pipe (2).
    9. Fig 2: Removing Front Exhaust Manifold Pipe
    G01818221Courtesy of GENERAL MOTORS CORP.
  9. Remove the front exhaust manifold pipe seal from the left exhaust manifold. Do not reuse the seal.
  10. Remove the exhaust manifold flange retainer.
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