Chevrolet Captiva C140 Manual page 152

3–30 DRIVING YOUR VEHICLE
TURBOCHARGER SYSTEM TURBOCHARGER SYSTEM TURBOCHARGER SYSTEM TURBOCHARGER SYSTEM TURBOCHARGER SYSTEM
(Diesel only) (Diesel only) (Diesel only)
(Diesel only) (Diesel only)
Turbochargers help the engine operate more
smoothly and with greater efficiency.
The turbocharger consists of two turbo ele-
ments, a turbine and a compressor, both of
which are driven from the main centre shaft.
The turbine uses the energy of the exhaust
gas to drive the compressor. The compressor,
in turn, draws in fresh air which it supplies to
the cylinders in the form of compressed air.
The intercooler cools down the compressed
air temperature to increase the engine power
by increasing the air density.
The turbocharger elements rotate very fast.
If the oil supply to running parts stops, the
turbocharger system may be seriously dam-
aged. The owner should be encouraged to
observe the following precautions to ensure
maximum turbocharger service life.
• After starting the engine, let it run for
about 1 to 2 minutes with idle speed (Avoid
acceleration or driving off the vehicle).
• Do not stop the engine immediately after
coming back from the high load driving
(such as high speed driving or driving down
a long slope). Let the engine run for about
1 to 2 minutes at idle speed to cool it down.
• After changing the engine oil and oil filter,
start the engine and let it run for about 1
to 2 minutes with idle speed (Avoid accel-
eration or driving off the vehicle).
• Operate the engine above idle only after
normal engine oil pressure has been
established. Forcing the turbocharger to
operate before the bearings are adequately
lubricated creates unnecessary friction.
• Use only the specified engine oil and
observe inspection and replacement
intervals.
• At low ambient temperature, or when the
vehicle has not been used for a long pe-
riod, normal engine oil pressure and flow
is affected. Under these conditions the
engine should be started and allowed to
idle for a few minutes before operating at
higher rpm.