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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 CTS - RHD 🢒 Preface 🢒 Cautions and Notices 🢒 Exhaust Manifold Replacement - Right Side

Exhaust Manifold Replacement - Right Side LA3, LY9

Removal Procedure

Caution: Refer to Exhaust Service Caution in the Preface section.

Caution: Refer to Protective Goggles and Glove Caution in the Preface section.

  1. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement in Engine Mechanical-2.6L and 3.2L.

    2. Object Number: 785768 Size: SH
  2. Disconnect the 2 cable harness clips (1) securing the engine wiring harness (4) to the ECM bracket (2) and position aside.
  3. Remove the 2 bolts (3) securing the after boil coolant pump to the ECM bracket, and position aside.

    4. Object Number: 785788 Size: SH
  4. Disconnect the heated oxygen sensor pigtail (2) from the wiring harness connector (1).

    5. Object Number: 815456 Size: SH
  5. Remove the following right exhaust manifold retaining nuts:
    6. • The 3 upper
    • The front lower
  6. Remove the starter. Refer to Starter Motor Replacement in Engine Electrical.
  7. Remove the heated oxygen sensor if replacement is necessary. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 in Engine Controls-2.6L and 3.2L.
  8. Remove the remaining right exhaust manifold retaining nuts.
  9. Remove the right exhaust manifold and the gasket from the engine. Do not reuse the gasket.
  10. Clean and inspect the right exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection in Engine Mechanical-2.6L and 3.2L.

Installation Procedure

    Object Number: 815456 Size: SH
  1. Place a NEW exhaust manifold gasket over the cylinder head studs.
  2. Position the right exhaust manifold to the right cylinder head.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the right exhaust manifold 3 lower nuts.

    4. Tighten
    Tighten the exhaust manifold nuts to 20 N·m (15 lb ft).

  4. Install the heated oxygen sensor if previously removed. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 in Engine Controls-2.6L and 3.2L.
  5. Install the starter. Refer to Starter Motor Replacement in Engine Electrical.
  6. Install the remaining right exhaust manifold nuts.

    7. Tighten
    Tighten the exhaust manifold nuts to 20 N·m (15 lb ft).


    Object Number: 785788 Size: SH
  7. Connect the heated oxygen sensor pigtail (2) to the wiring harness connector (1).

    8. Object Number: 785768 Size: SH
  8. Install the 2 bolts (3) securing the after boil coolant pump to the ECM bracket.

    9. Tighten
    Tighten the afterboil coolant pump bolts to 10 N·m (89 lb in).

  9. Connect the 2 cable harness clips (1) securing the engine wiring harness (4) to the ECM bracket (2).
  10. Install the drive belt tensioner. Refer to Drive Belt Tensioner Replacement in Engine Mechanical-2.6L and 3.2L.