OEM 2009 Cadillac DTS Exhaust Manifold

2009 Cadillac DTS Exhaust Manifold Parts Questions & Experts Answers

• Q: How to replace the right side exhaust manifold on 2009 Cadillac DTS?

  A: Prior to replacing the right side Exhaust Manifold you need to ensure safety by using protective goggles with rubber gloves. The maintenance starts with the removal of the connector position assurance (CPA) retainer and separation of the engine harness electrical connector from the heated Oxygen Sensor (HO2S). The next step involves taking out the ho2s clip which is attached to the secondary air injection (AIR) valve hose bracket. First lock the steering column with j 42640 (Steering Column Lock Pin) while simultaneously raising the vehicle. Uninstall the rear Exhaust Manifold pipe together with the air check valve. Separate the engine harness clips numbered 2 and 3 that connect to the steering gear heat shield before unfastening the bolts securing the shield. Proceed to separate the intermediate shaft from the steering gear by first disconnecting electronic suspension position sensor link ball studs from lower control arms, then unsnap and remove intermediate shaft seal, and finally remove the intermediate shaft pinch bolt. A tall screw jack supporting the frame rear section requires removal of four engine frame-to-body bolts followed by the jack lowering 4 cm (1.5 inches) to enable the engine frame descent. To replace the Exhaust Manifold start by removing the ho2s sensor as well as Exhaust Manifold nuts followed by removing the Exhaust Manifold before discarding the Exhaust Manifold Gasket . To install the Exhaust Manifold begin by laying a new Exhaust Manifold Gasket onto the cylinder head studs after which install the Exhaust Manifold and tighten each nut up to 25 nm (18 lb ft). The threads of an old ho2s must be treated with anti-sieze compound gm p/n 12377953 or an equivalent substance before installation at a torque of 41 nm (30 lb ft). Position the engine frame and bolt the four rearward engine frame-to-body components with 191 nm (141 lb ft) torque before removing the screw type jack. The intermediate shaft needs to be connected to the steering gear followed by installation of the intermediate shaft pinch bolt and torquing it to 45 nm (33 lb ft). Afterward, install the intermediate shaft seal. Use the ball studs of the electronic suspension position sensor link to reconnect to lower control arms. Install the steering gear heat shield followed by its bolts with a torque specification of 9 nm (80 lb in). The work includes connecting engine harness clips (3 and 2) to the steering gear heat shield while also installing an air check valve and the rear Exhaust Manifold pipe and then lowering the vehicle before removing the j 42640 (Steering Column Lock Pin), reconnecting the engine harness electrical connector to the ho2s and installing the ho2s clip to the air valve hose bracket and completing with the cpa retainer installation.