Table of Contents
ENGINE / COOLING SYSTEM
19. Inspect turbine inlet runners
oily residue. Inspect compressor discharge outlet
for any oil.
If any oil is present in the turbine manifold inlet runners
or cylinder head exhaust ports, the source of oil is likely
engine related.
If any oil is present in the compressor inlet, the source
of oil is likely related to the crankcase ventilation
system.
20. A compressor side oil leakage issue is likely if oil is
present in the compressor discharge, but not in the
compressor inlet. Similarly, it can be assumed a
turbine side oil leakage is likely if oil is present in the
turbine discharge outlet, but not in the turbine inlet
runners / exhaust ports.
Inspect the exhaust port flange surface for any signs of
pre-turbine exhaust leakage.
IMPORTANT
If you are replacing the turbo, put some new engine oil
down the supply hole and rotate turbo by hand. Do NOT
use compressed air.
3.24
t
for the presence of
NOTE
NOTE
ACTUATOR / WASTEGATE INSPECTION
y
The actuator pod, actuator rod/linkage and internal
wastegate flapper components, along with the boost
control solenoid, are responsible for releasing pre-turbine
exhaust pressure and limiting boost pressure. The
actuator is located outside of the turbocharger,
positioned below the unit with the actuator pod fastened
to the compressor housing by M6 fasteners.
1. If a condition where little-to-no boost pressure is seen
under wide open throttle, ensure that the actuator rod
is still properly fastened, the flapper arm is still under
tension from the actuator pod, and that no
mechanical component failures have occurred.
2. Feel for any free-play on either end of the actuator
rod. Ensure that the actuator crank arm is holding the
internal wastegate disc firmly closed.
3. Using the turbine discharge flange as a mounting
point, fasten a magnetic base dial indicator to the
turbine housing, touching the dial indicator plunger to
the outer wastegate crank arm
direction so that the opening distance of the
wastegate flapper valve is measured by the dial
indicator. The location of the dial indicator plunger
should be just below the crank arm upper taper, as
close to the axis of the heim joint as possible. Zero
the indicator dial with the flapper in its natural resting
position with no air pressure applied to the actuator
pod.
9928491 R04 - 2017-2018 RZR XP Turbo / XP4 Turbo Service Manual
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in the axial
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