Mitsubishi 4G1 Service Manual page 188

11 C-64
assembly
INSPECTION
TURBINE HOUSING
(1) Check the housing for traces of contact with the turbine
wheel, cracks due to overheating, pitching, deformation
and other damage. Replace with a new turbine housing if
cracked.
(2) Operate the waste gate valve lever manually to check that
the gate can be opened and closed smoothly.
COMPRESSOR COVER
(1) Check the compressor cover for traces of contact with the
compressor wheel and other damage.
TURBINE WHEEL ASSEMBLY
(1) Check the turbine and compressor wheel blades for bend,
burr, damage, corrosion and traces of contact on the back
side and replace if defective.
(2) Check the oil passage of the turbine wheel assembly for
deposit and clogging.
(3) In the case of water cooled type, check also the water
passage for deposit and clogging.
(4) Check the turbine wheel and compressor wheel for light
and smooth turning.
REASSEMBLY SERVICE POINTS
O-RING INSTALLATION
(1) Apply a light coat of engine oil to a new O-ring and fit the
O-ring in the groove of the turbine wheel assembly.
TURBINE WHEEL ASSEMBLY INSTALLATION
(1) Install the turbine wheel assembly to the compressor cover
while aligning the dowel pin with the dowel pin hole.
Caution
Use care not to damage the blades of turbine wheel
and compressor wheel.
Chamfered 1
(1) Fit the snap ring with its chamfered side facing up.