Mercury 7T4Z-5E213-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.

For V6 engines, the front cylinder head (3.0L engine) has the catalyst as an integral component of the exhaust manifold.

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.