Dodge 2000 DURANGO Service Manual page 704

11 - 2 EXHAUST SYSTEM
DESCRIPTION AND OPERATION (Continued)
CATALYTIC CONVERTER
DESCRIPTION
California emissions vehicles incorporate mini cat-
alytic converters into the exhaust system. The pipes
and catalytic converters are made of stainless steel
designed to operate at extremely high temperatures
(Fig. 2).
Fig. 2 Catalytic Converter—Typical
1 – EXHAUST PIPE
2 – CONVERTER
3 – MUFFLER
4 – CLAMP
OPERATION
The catalytic converter captures and burns any
unburned fuel mixture exiting the combustion cham-
bers during the exhaust stroke of the engine. This
process aids in reducing emissions output.
EXHAUST PIPE
DESCRIPTION
The exhaust pipe(s) is a one piece design encom-
passing the exhaust pipe(s) and the catalytic convert-
er(s). Neither the exhaust pipe(s) or the catalytic
converter(s) is serviceable separately (Fig. 3).
MUFFLER
DESCRIPTION
All engines use a stainless steel muffler to control
exhaust noise levels and exhaust back pressure (Fig.
4).
Fig. 3 Exhaust Pipe with Integral Catalytic
Converter(s)
1 – NUT
2 – EXHAUST PIPE
3 – MINI CATALYTIC CONVERTERS (CALIFORNIA EMISSIONS
VEHICLES ONLY)
4 – CATALYTIC CONVERTER
Fig. 4 Muffler—Typical
1 – CATALYTIC CONVERTER WITH PIPE
2 – REAR MUFFLER HANGER
3 – MUFFLER
4 – CLAMP
DN