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Home >> Pontiac >> 2003 >> Grand Prix GTP >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Repair Instructions >> Exhaust Pipe Replacement >> Installation Procedure

Installation Procedure

NOTE: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.
  1. Position the exhaust pipe under the vehicle and support the pipe.
  2. Install the exhaust insulator hangers to the exhaust pipe.
  3. Install the exhaust muffler inlet pipe clamps. Do not tighten the exhaust muffler inlet pipe clamp nuts.
    Fig 1: Positioning Exhaust Pipe Under Vehicle
    G02080740Courtesy of GENERAL MOTORS CORP.
  4. Install the exhaust pipe to the mufflers.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  5. Tighten the exhaust muffler inlet pipe clamp nuts.

    Tighten 

    Tighten the exhaust muffler inlet pipe clamp nuts to 50 N.m (37 lb ft).

    Fig 2: Installing Exhaust Pipe To Mufflers
    G02080741Courtesy of GENERAL MOTORS CORP.
  6. Install a new catalytic converter gasket.
  7. Install the catalytic converter nuts.

    Tighten 

    Tighten the nuts to 60 N.m (44 lb ft).

  8. Remove the support from the exhaust system.
  9. Inspect for exhaust system leaks and underbody contact.
  10. Lower the vehicle.
    Fig 3: Installing Catalytic Converter Nuts
    G02080742Courtesy of GENERAL MOTORS CORP.