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S08 MAINTENANCE
TURBOCHARGER
CAUTION !
A turbocharger is an exhaust-driven mechanical device that
boost engine power by pumping more air into the engine.
A turbocharger uses a pair of fan-like castings mounted on
a common shaft. One (called the turbine) is piped to the
exhaust, while the other (the compressor) is piped to the
engine intake. The flow of exhaust spins the turbine, which
causes the compressor to turn. The compressor serves to
blow air into the engine at a greater rate than it can pull it in
on its own. The greater volume of air can be mixed with a
greater volume of fuel, which increases the power output.
Principle of operation (intercooler not on all models)
TURBO SERVICE
An engine turbocharger is designed to provide long years
of trouble free service, which if required, can only be
performed by a specialized workshop. In view to maintain
turbocharger performances for as long as possible, some
basic rules must be followed.
Changing or cleaning the air filter on a regular basis is a
good way to keep debris from causing problems with the
intake side of turbochargers.
A turbocharged engine will definitely need more oil
changes than an ordinary atmospheric one, as the turbines
axle requires excellent lubrication. For this reason, oil
characteristics must be followed closely. Never use low
grade bargain lubrication oil.
Turbochargers get very hot when engine is running and a
protective metal shield or thermal sleeve is always affixed
onto the exhaust side to prevent burns. Never remove
these shields.
Do not get confused : a turbocharger is driven by the flux
of exhaust gases. On a supercharger, the air intake turbine
is driven through the intermediate of a belt. In addition to
a rotation speed far lower compared to a turbocharger,
an amount of output power is subtracted fom the engine
because of the belt drive system.
NOTE !
There is no serviceable part for the end user inside a
turbocharger. Any attempt to disassembling would lead to
a total failure.
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