Mercury 7L8Z-5G232-CA Catalytic Converter Assembly

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A catalytic converter (or catalyst) is an emission control device in the exhaust system that reduces certain pollutants in the exhaust gas stream. There are two types of converters: an oxidation catalyst, which reduces hydrocarbons (HC) and carbon monoxide (CO), and a reduction catalyst, which reduces oxides of nitrogen (NOx). Catalysts that can reduce all three pollutants are known as "three-way catalysts." The models covered by this manual are equipped with three-way catalysts.

Remove the passenger's side inner fender splash shield and the engine drive belt.

Be careful not to scratch or gouge the gasket surface when removing gasket material, as any damage may cause leaks after reassembly.

Remove the exhaust manifold and the gasket, then remove and discard the mounting studs.

Remove the exhaust manifold heat shield by taking out the heat shield mounting bolts.

A catalytic converter (or catalyst) is an emission control device in the exhaust system that reduces certain pollutants in the exhaust gas stream. There are two types of converters: an oxidation catalyst, which reduces hydrocarbons (HC) and carbon monoxide (CO), and a reduction catalyst, which reduces oxides of nitrogen (NOx). Catalysts that can reduce all three pollutants are known as "three-way catalysts." The models covered by this manual are equipped with three-way catalysts.