Volvo 1992 240 User Manual
Page 105
1992 Volvo 240
and continuous operation at its working temperature.
This type of Lambda-sond™ does not require periodic replacement.
Catalytic Converter
This is a supplementary device in the exhaust system, designed to reduce exhaust emissions.
This device is mainly a container with a ceramic material insert, designed to let exhaust gases pass
through channels in the insert. The channel walls are covered by a thin layer of platinum and rhodium.
These metals act as catalysts, permitting a chemical action to occur without actually taking part in it.
The carbon monoxide content will increase if the Catalytic Converter is damaged.
CAUTION:
Vehicles with Catalytic Converter must use unleaded fuel only. Otherwise the Catalytic Converter will
become damaged and ineffective.
pg. 80 Servicing (cont.)
Engine Crankcase Ventilation System
Crankcase ventilation
The engine is provided with positive crankcase ventilation (PCV) which prevents crankcase gases from
being released into the atmosphere.
Instead, the crankcase gases are admitted to the intake manifold and cylinders.
B230F
1 PCV nipple
2 Flame
Guard
3 Oil trap
PCV system, B230F engine
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