OEM Cadillac DTS Exhaust Manifold

Cadillac DTS Exhaust Manifold Parts Questions & Experts Answers

• Exhaust Manifold, Passenger Side
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  Q: How to replace the right side exhaust manifold on Cadillac DTS?

  A: Starting to replace the right side Exhaust Manifold requires using steering column lock pin (J 42640) to set the steering column into the lock position. Support the vehicle with raised components and remove the rear Exhaust Manifold pipe together with the air check valve. The engine harness clips must be detached from the steering gear heat shield before the removal of the heat shield bolts results in the heat shield's departure. First unsnap and remove the intermediate shaft seal before you take out the pinch bolt that secures the intermediate shaft while removing it from the steering gear. Lowering the engine frame needs a screw-type jack to support its rear component allowing removal of four engine frame-to-body bolts. The Exhaust Manifold extraction requires removing the heated Oxygen Sensor (HO2S) along with the Exhaust Manifold nuts followed by extracting and discarding the old Exhaust Manifold Gasket. Start by mounting the new Exhaust Manifold Gasket onto the cylinder head studs then install the Exhaust Manifold before securing nuts to 25 n.m (18 lb ft). Coat the ho2s threads with anti-sieze compound (GM P/N 12377953 or equivalent) when installing the sensor while tightening it to 41 n.m (30 lb ft). Place the engine frame correctly into its position and replace the four rearward engine frame-to-body bolts while torquing them to 191 n.m (141 lb ft). Screw-type jacks should be removed while you reconnect the intermediate shaft to the steering gear followed by pinch bolt installation and tightening it to 45 n.m (33 lb ft). The steering gear heat shield and its bolts need to be reinstalled before final tightening at 9 n.m (80 lb in). To finalize the installation conclude by connecting the engine harness clips to the steering gear heat shield followed by installing the air check valve and rear Exhaust Manifold pipe then lowering the vehicle, extracting the steering column lock pin (J 42640) while connecting the engine harness electrical connector to the ho2s and adding the ho2s clip to the air valve hose bracket and securing the connector position assurance (CPA) retainer.