Gran Fury V8-318 5.2L VIN K 2-bbl (1982)
Catalytic Converter: Description and Operation
General Description
Fig. 10
The catalytic converter serves two purposes: it permits a faster chemical reaction to take place and although it enters into the chemical reaction, it
remains the same, ready to repeat the process. The catalytic converter combines hydrocarbons (HC) and carbon monoxide (CO) with oxygen to
form water (H2O) and carbon dioxide (CO2).
The catalyst is structured in the form of a honeycomb monolith, Fig. 10. The catalyst consists of a porous substrate of an inert material, coated
with platinum and other metals, the catalytically active materials.
This device, located in the exhaust system between the exhaust manifold and muffler, requires the use of heat shields, in some cases, due to its high
operating temperatures.
The heat shields are necessary to protect chassis 'components, passenger compartment and other areas from heat related damage.
A smaller diameter fuel tank filler tube neck is incorporated to prevent the larger service station pump nozzle, used for leaded fuels, being inserted
into the filler tube, thereby preventing system contamination.
Fig. 12
1977-82 vehicles incorporate two mini-oxidation catalytic converters in conjunction with the main underfloor converter. Their main purpose is to
initiate exhaust gas oxidation before the gases reach the underfloor converter. The mini-ox, Fig. 12, is a single biscuit catalytic converter and is
shaped so that only one small biscuit can fit inside the can.
