Porsche 911 TURBO - 1989 Workshop Manual page 62

Turbocharger
CHECKING TURBOCHARGER SHAFT END PLAY
1. Place dial gauge in holder. Special tool P 207
can be used as a holder.
2. Set dial gauge on end of turbine wheel shaft.
Press rotor shaft against dial gauge, read and
note play. Press rotor shaft in opposite direction,
read and note play. Difference of both readings
is the end play.
Max. play: 0,35 mm
CHECKING TURBOCHARGER TURBINE RADIAL PLAY
Radial play is checked on the turbine end only.
Note
Be sure !!.9.!.. to rotate the turbine wheel at all
during these measurements.
1. Press turbine wheel toward side of housing.
check gap with a feeler gauge and note.
2. Press turbine wheel toward opposite side of
housing. check gap and note.
Difference of both measurements is the radial
play. Measure play at least at two different
locations.
Max. play: 0,65 mm
Printed in Germany
Checking Turbocharger
21 -4