2002 VOLVO C70 maintenance

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Page 67 of 99

VOLVO C70 2002 Owners Manual For proper functioning of the vehicle and its emission control systems, the timing belt and belt tensioner must be
replaced every 105,000 miles (168,000 km). Engine damage will occur if the belt

For proper functioning of the vehicle and its emission control systems, the timing belt and belt tensioner must be
replaced every 105,000 miles (168,000 km). Engine damage will occur if the belt fails.
PCV system
(on turbocharged models)
The nipple in the intake manifold and the filter at the end of the PCV hose in the air cleaner should be inspected and
cleaned at 105,000 miles (168,000 km) and thereafter, again at 150,000 mile (240,000 km) intervals.
Spark plugs
The spark plugs should be replaced every 60,000 miles (96,000 km) under normal driving conditions. City driving or
fast highway driving may necessitate replacement sooner.
Under normal driving conditions, spark plugs require no maintenance between replacement intervals. When installing
new plugs, be sure to use the right type and to tighten them correctly. When changing the plugs, clean the terminals
and rubber seals. Also check that the suppressor connectors are in good condition. Cracked or damaged connectors
should be replaced.
pg. 118 Fuel/emissions systems
Fuel system
The fuel system is allelectronic and is microprocessorcontrolled. It can continually compensate for variation in engine
load, speed and temperature to give the best economy and power. A mass air flow sensor measures the inducted air. In
this way the system can make instantaneous adjustments for changes in air temperature or density, thus always
assuring the best economy with the lowest possible exhaust emissions.
Heated oxygen sensor(s)
This is an emission control system designed to reduce emissions and improve fuel economy. The heated oxygen sensor
monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic
module. This adjusts the airfuel ratio to provide optimum conditions for combustion and efficient reduction of the three
major pollutants (hydrocarbons, carbon monoxide and oxides of nitrogen (NOx) by a threeway catalytic converter.
Crankcase ventilation
Crankcase ventilation
The engine is provided with positive crankcase ventilation which prevents crankcase gases from being released into the
atmosphere. Instead, the crankcase gases are admitted to the intake manifold and cylinders.
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Page 90 of 99

VOLVO C70 2002 Owners Manual 2 0 0 2
VOLVO
C70 Coupe & Convertible
INDEX
pg. 197 - 199 Index
A
ABS 19
Air conditioning37
Air filter - engine117
Air mix35
Air vents35
Airbag (SIPS)8
Airbag (SRS)4
Alarm48
Ambient temperature senso

Page 93 of 99

VOLVO C70 2002 Owners Manual Heating and air conditioning35
High beams19
Hoisting the car116
Homelink®194-196
Hood58
I
Ignition switch23
Immobilizer (start inhibitor)46
Instrument illumination24
Instruments16, 17
J
Jack60
, 9

Page 94 of 99

VOLVO C70 2002 Owners Manual Parking brake reminder light20
Parking lights22
PCV system117
Polishing111
Power seats50
Power steering fluid122, 130
R
Radio
-General information190
-SC813138
-SC-816151
-SC-901167
Radio Data System

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