Cessna 182 1978 - Turbocharger

MODEL
182
&
T182
SERIES
SERVICE
MANUAL
e.
Remove
nuts
attaching
exhaust
stack
assemblies
11A-76.
TURBOCHARGER
(See
figure
11A-8.)
to
the
cylinders
and
remove
exhaust
stacks
and
gas-
kets.
NOTE
f.
Reverse
the
preceding
steps
for
reinstallation.
Install
a new
gasket
between
each
riser
and
its
mount-
For
additional
information
covering
turbo-
ing
pad
on
each
cylinder,
regardless
of
apparent
cond-
charger
and
component
maintenance,
over-
ition
of those
removed.
Torque
exhaust
stack
nuts
at
haul
and
trouble
shooting
refer
to the
cylinders
to
100-110
in-lbs.
Manufacturer's
Overhaul
Manual.
11A-77.
DESCRIPTION.
The
turbocharger
is
an
11A-75.
INSPECTION.
Since
exhaust
systems
of
exhaust
gas-driven
compressor,
or
air
pump,
which
this
type
are
subject
to
burning.
cracking
and
general
provides
high
velocity
air
to
the
engine
intake
mani-
deterioration
from
alternate
temperature
extremes
fold.
The
turbocharger
is composed
of a
turbine
and
vibrations,
inspection
is
important
and
must
be
wheel,
compressor
wheel,
turbine
housing
and
com-
accomplished
every
50
hours
of
operation.
To
inspect
pressor
housing.
The
turbine,
compressor
wheel
the
engine
exhaust
system,
proceed
as
follows:
and
interconnecting
drive
shaft
comprise
one
com-
a.
Remove
engine
cowling
as
required
so
that
ALL
plete
assembly
and
are
the
only
moving
parts
in the
surfaces
of
the
exhaust
assemblies
can
be
visually
turbocharger.
Turbocharger
bearings
are
lubricated
inspected.
with
filtered
oil
supplied
from
the
engine
oil
system.
Engine
exhaust
gas
enters
the turbine
housing
to drive
NOTE
the
turbine
wheel.
The
turbine
wheel,
in
turn,
drives
the
compressor
wheel,
producing
a high
velocity
of
Especially
check
the
areas
adjacent
to
welds
air
in
the
engine
induction
system.
Exhaust
gas
is
and
slip
joints.
Look
for
gas
deposits
in
sur-
then
dumped
overboard
through
the
exhaust
outlet
of
rounding
areas.
indicating
that
exhaust
gases
the
turbine
housing
and
exhaust
tailpipe.
Ram
air
is
are
escaping
through
a crack
or
hole
or
around
drawn
into
the
compressor
through
the
induction
air
the
slip
joints.
filter
and
is
forced
out
of
the
compressor
housing
through
the
carburetor,
to
intake
manifold
This
high
b.
After
visual
inspection,
an
air
leak
check
should
velocity
air
enters
the
carburetor
where
fuel
is
added,
be
made
on
the
exhaust
system
as
follows:
and
flow
is
limited
by
the
throttle
valve
setting.
Dur-
1.
Attach
the
pressure
side
of
an
industrial
vac-
ing
the
transient
interval
from
low
to
high
RPM,
the
uum
cleaner
to the
tailpipe
opening,
using
a
rubber
absolute
pressure
relief
valve
functions
to limit
maxi-
plug
to
effect
a seal
as
required.
mum
pressure
available
to the
carburetor
by
releasing
surplus
to
engine
compartment
atmosphere.
It also
NOTE
presets
a
maximum
available
manifold
pressure.
Actual
available
manifold
pressure
is regulated
by the
The
inside
of
vacuum
cleaner
hose
should
be
turbocharger
speed,
controlled
by
the
wastegate
by-
free
of
any
contamination
that
might
be
blown
pass
action
or directly
by
the
operator.
into
the
engine
exhaust
system.
2.
With
vacuum
cleaner
operating.
all
joints
in
the
exhaust
system
may
be checked
manually
by
feel,
or
by
using
a soap
and
water
solution
and
watching
This
turbocharged
engine
installation
is
for bubbles.
Forming
of bubbles
is considered
accept-
equipped
with
an overboost
control
valve
able;
if bubbles
are
blown
away,
system
is not
con-
c.
Where
a surface
is not
accessible
for
a visual
inspection,
or for
a more
positive
test,
the
following
Consequently,
it is
necessary
that
the
procedure
is
recommended.
Consequently,
it
is
necessary
that
the
1.
Remove
exhaust
stack
assemblies.
pressure.
particularly
during
takeoff.
2. Use
rubber expansion
plugs
to seal
openings.
pressre
particularly
duringtakeoff.
3. Using
a manometer or gage,
apply approxi-
climb and
power chanes in
flight
mately
1-1/2
psi
(3 inches
of
mercury)
air pressure
The
slight
overboosting
of manifold
pressure
while each
stack assembly
is submerged
in water.
beyond established
maximums which
is occa-
beyond
established
maximums
which
is occa-
Any
leaks
will appear
as
bubbles
and can
be readily
detected.
4. It is
recommended
that exhaust
stacks
found
or during
a power
change
in
flight
is not con-
defective be
replaced before the next
flight.
sidered detrimental
to the engine as long
as
d. After
installation
of exhaust
system components
it
does not exceed
2 inches
and is momentary.
perform
the
inspection
in step
"b"
of
this
paragraph
to ascertain
that system
is acceptable.
OVERBOOST
EXCEEDING
2 INCHES
beyond
established
maximum
is excessive
and
can
result
in
engine
damage.
Refer
to
Lycoming
Service
Bulletin
No.
369F
and
all
revisions
or
supplements
thereto.
11A-23