Specifications

Volvo 1990 760 Model
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".
pg. 112 Servicing (cont.)
WARNING!
The ignition system operates at very high voltages. Special safety precautions must be followed to
prevent injury.
Always turn the ignition off when:
● connecting engine test and diagnostic equipment to the vehicle (timing light, tach-dwell tester,
ignition oscilloscope, etc..).
● Replacing distributor ignition components e.g. plugs, coil, distributor, HT leads etc.
● Do not touch any part of the distributor ignition system while the engine is running. This may result
in unintended movements and body injury.
Replacing spark plugs
The spark plugs should be changed every 30,000 miles (48,000 km). However, city driving or fast
highway driving may necessitate changing after 15,000 miles (24,000 km) of driving. When installing
new plugs, be sure to fit the right type and use correct torque, see Specifications. When changing the
plugs, check that the suppressor connectors are in good condition. Cracked or damaged connectors
should be replaced.
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