Mercury 7T4Z-5E212-BC Catalytic Converter Assembly

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To replace the catalytic converter in four-cylinder engines, start by raising the vehicle and placing it securely on jackstands. Locate and disconnect the downstream oxygen sensor on the upper central part of the catalyst. Unscrew and remove the downstream oxygen sensor/catalyst sensor from the catalyst. Loosen the fasteners on the clamp that secures the front end of the catalyst to the turbocharger. Remove the nuts and bolts that secure the flange at the rear end of the catalyst to the exhaust pipe. Remove the catalytic converter and discard the old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, using a new gasket and new fasteners if necessary.

To remove the catalytic converter on 2010 and later models with a 2SL four-cylinder engine and Non-Partial Zero Emissions (PZEV) vehicles, raise the vehicle and place it securely on jackstands. Disconnect the downstream oxygen sensor's electrical connector, unscrew and remove the downstream oxygen sensor from the catalyst. Remove the nuts and bolts securing the flange at the front end of the catalyst to the exhaust down pipe. Loosen the fasteners on the clamp securing the rear end of the catalyst to the exhaust system. Remove the catalytic converter and old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, using a new gasket and, if necessary, new fasteners.

To replace the catalytic converter in four-cylinder engines, start by raising the vehicle and placing it securely on jackstands. Locate and disconnect the downstream oxygen sensor on the upper central part of the catalyst. Unscrew and remove the downstream oxygen sensor/catalyst sensor from the catalyst. Loosen the fasteners on the clamp that secures the front end of the catalyst to the turbocharger. Remove the nuts and bolts that secure the flange at the rear end of the catalyst to the exhaust pipe. Remove the catalytic converter and discard the old gasket between the exhaust down pipe and the catalyst mounting flange. Installation is the reverse of removal, using a new gasket and new fasteners if necessary.