Subaru Workshop Manuals
Hatchback 4WD F4-1781cc 1.8L (1983)
Engine, Cooling and Exhaust > Exhaust System > Catalytic Converter > Component Information > Technical Service Bulletins > Page 1091
Catalytic Converter: Description and Operation
Catalytic converters are used to reduce emissions of hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx).
The catalytic materials within the converter stimulate reactions that reduce the objectional components of exhaust gas to carbon dioxide and water
The basic catalytic materials are platinum (Pt) and rhodium (Rh). A thin film of Pt/Rh mixture is applied to a porous, honeycomb ceramic carrier.
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