OEM 2008 Cadillac STS Catalytic Converter

2008 Cadillac STS Catalytic Converter Parts and Q&A

• Q: How to replace the right side catalytic converter on 2008 Cadillac STS?

  A: Starting the right side Catalytic Converter replacement requires removal of the right bank exhaust manifold heat shield. Begin by taking out the nuts from the Catalytic Converter before raising the vehicle for support. The front driveshaft needs removal when your vehicle has awd. You should first disconnect both the left side and right side Catalytic Converter's Oxygen Sensor electrical connector and muffler pipe connections. Start by removing Exhaust Pipe fasteners from the right bank Catalytic Converter and then proceed with carefully removing the combination of the converter and the seal/heat shield and Oxygen Sensor from the exhaust manifold. Take out the Oxygen Sensor that exists within the Catalytic Converter. During installation connect the sensor to the Catalytic Converter and check the seal/heat shield sealing point on the converter for wear and make replacements if needed. Position the Catalytic Converter carefully onto the exhaust manifold while secure fasteners to hold it in place. After that, install the Catalytic Converter seal/heat shield to the converter. Reconnect the Oxygen Sensor wiring while conducting a seal inspection on the Catalytic Converter. Replace the seal if found damaged during the check. Secure the muffler pipes to the left and right side catalytic converters while tightening their nuts to 22 n.m (16 lb ft). Reinstallation of the front driveshaft happens if your vehicle has awd. Lower the vehicle while tightening the Catalytic Converter fasteners to 50 n.m (37 lb ft) torque level. Reinstall the right bank exhaust manifold heat shield as your last step.