Toyota Supra 1990 Manual page 148

TC-14
Oil Outlet Hole
TURBOCHARGER SYSTEM - Turbocharger
EM3275
EM3276
TC0040
TC0039
INSPECTION OF TURBOCHARGER
1. INSPECT IMPELLER WHEEL ROTATION
Grasp the edge of the turbine wheel and turn it. Check that
the impeller wheel turns smoothly.
If the impeller wheel does not turn or if it turns with a drag,
replace the turbocharger assembly.
2.
INSPECT AXIAL PLAY OF TURBINE SHAFT
Insert a dial indicator into the hole in the turbine wheel on
the exhaust side and measure the axial play of the shaft.
Axial play: 0.13 mm (0.0051 in.) or less
If the axial play is not as specified, replace the turbocharger
assembly.
3.
INSPECT RADIAL PLAY OF TURBINE SHAFT
(a) From the oil outlet hole, insert the dial indicator
through the hole in the spacer bearing and set it in
the center of the turbine shaft.
(b) Moving the turbine shaft in a radial direction, meas-
ure the radial play of the shaft.
Redial play: 0.18 mm (0.0071 in.) or less
If the radial play is not as specified, replace the turbocharger
assembly.