General Description And System Operation; Exhaust System; Muffler; Catalytic Converter - Daewoo CIELO EURO III Manual

GENERAL DESCRIPTION
AND SYSTEM OPERATION

EXHAUST SYSTEM

Notice: When you are inspecting or replacing the ex-
haust system components, make sure there is adequate
clearance from all points on the underbody to avoid pos-
sible overheating of the floor pan and possible damage
to the passenger compartment insulation and trim mate-
rials.
Caution: Check the complete exhaust system and
the nearby body areas and the trunk lid for broken,
damaged, missing, or mispositioned parts, open
seams, holes, loose connections, or other deterio-
ration which could permit hazardous exhaust
fumes to seep into the trunk or the passenger
compartment. Dust or water in the trunk may be an
indication of a problem in one of these areas. Any
defects should be corrected immediately.

MUFFLER

Aside from the exhaust manifold connection, the ex-
haust system uses a flange and seal joint design as op-
posed to a slip joint coupling design with clamps and
U-bolts. If holes, open seams or any deterioration is dis-
DAEWOO T-154 BL2,3
ENGINE EXHAUST 1G – 12
covered upon inspection of the front muffler and pipe as-
sembly, the complete assembly should be replaced. The
same procedure is applicable to the rear muffler assem-
bly.
Heat shields in the front and the rear muffler assembly
positions, as well as for the main catalytic converter and
the connecting pipe, protect the vehicle and the environ-
ment from high temperatures the exhaust system devel-
ops.
CATALYTIC CONVERTERS
Notice: When jacking or lifting the vehicle from the body
side rails, be certain that the lift pads do not contact the
main catalytic converter as this could damage the main

catalytic converter.

Notice: The catalytic converter requires the use of un-
leaded fuel only, or damage to the catalyst will result.
The catalytic converters are emission control devices
added to the exhaust system to reduce pollutants from
the exhaust pipes.
The oxidation catalyst is coated with a catalytic material
containing platinum and palladium, which reduces levels
of hydrocarbon (HC) and carbon monoxide (CO) from
the exhaust gas. The three-way catalyst has coatings
which contain platinum and rhodium, which additionally
lower the levels of oxides of nitrogen (NOx).