Eagle Sedan L6-258 4.2L (1984)
nitrogen.
Operation
The catalyst used to create these conversions are platinum, palladium and rhodium (depending on type of converter).
During engine operation, all of the exhaust gases flow through the converter where a chemical change takes place.
As with the three-way catalytic (TWC) converter, this converter must be used in conjunction with a feedback carburetor system in order to
maintain high efficiency.
Construction
This type of converter, Fig. 9, is two converters in one container.
^ The front half is a three-way catalytic (TWC) converter while the rear half is a conventional oxidizing catalytic (COC) converter.
^ The rear half of the converter has a provision for ``downstream'' air injection.
The body of the catalytic converter is made of stainless steel designed to last the life of the vehicle.
The conversion process causes the temperature inside the converter to be higher than the temperature of the exhaust gases when they leave the
engine. Due to this increase in heat, the converter is insulated so that its outside temperature is about the same temperature as the muffler.
To prevent adding leaded fuel, the fuel tank filler nozzle has a built-in restrictor, Fig. 8.
Warning: Due to its solid mass, the converter remains hot much longer than the muffler.
Caution: Excessive heat can bulge or distort the converter. Since excessive heat built up is not the fault of the converter, the fuel delivery or ignition
system should be checked whenever a converter is damaged by overheating.
