Subaru 2002 Impreza Service Manual page 136

TURBOCHARGER SYSTEM
Intake (Induction)
6: TURBOCHARGER UNIT
The turbocharger is water-cooled. It utilizes a wastegate valve to adjust its supercharging pres-
sure to an optimum level. The turbine is housed in a lightweight, thin-wall, heat-resistant casting.
The compressor housing is made of thin-wall, aluminum alloy casting. The shaft for turbine and
compressor is supported by a full-floating metal bearing system.
E
(1 ) Wastegate controller
(2) Compressor housing
(3) Turbine housing
W
1
A
A: Lubricating oil outlet
B: Exhaust gas outlet
C: Air outlet
D: Engine coolant inlet
NF0344
E: Lubricating oil inlet
F: Air inlet
G : Wastegate valve operating pressure
IN-4