Intercooler; Turbocharger - Volvo EC330B Operator's Manual

Service and maintenance

Intercooler

The engine is provided with an air-to air type intercooler. The inter-
cooler lowers the temperature of the induction air by approximately
100°C (212°F). The induction air then becomes more dense, so
that more fuel can be injected and combusted. This will result in a
higher engine output, but the colder air also leads to less stress on
valves and pistons.

Turbocharger

IMPORTANT
Leave the engine running at low idling speed for at least half
a minute after start and a few minutes before it is stopped.
This is to safeguard the lubrication of the turbocharger.
The turbocharger is lubricated and cooled through the engine lu-
brication system. A vital condition for the function of the turbo-
charger is that the engine oil is changed and the filters are
replaced at prescribed and regular times. The maintenance of the
air cleaner and the tightness of the exhaust system and the lubri-
cation lines are also important for the function.
If any jarring noises can be heard or if the turbocharger vibrates, it
must be reconditioned or changed immediately.
Only an authorized dealer workshop may carry out work on
the turbocharger.
A Exhaust in
B Exhaust out
C Air in
D Air out
Intercooler 139