Advertisement
Volvo 1990 740 Model
Catalytic Converter
This is a supplementary device in the exhaust system, designed to clean exhaust gases. This device is
mainly a container with a ceramic material insert, designed to let the exhaust gases pass through
channels in the insert. The channel walls are covered by a thin layer of platinum-palladium. These
metals act as catalysts, permitting a chemical action to occur without actually taking part in it.
The emission (CO, HC, NOx) content will increase if the three-way catalytic converter is damaged.
Lambda-sond equipped vehicles use Catalytic Converters containing platinum and rhodium.
Torque Catalytic Converter mounting bolts
The Catalytic Converter mounting bolts should be torqued after the first 600-1,200 miles (1,000-2,000
km).
CAUTION:
Vehicles with Catalytic Converter must use unleaded fuel only. Otherwise the Catalytic Converter will
become ineffective. See "Fuel requirements".
file:///K|/ownersdocs/1990/1990_740/90740_22.htm (4 of 7)12/30/2006 8:26:07 AM
Advertisement
