Piper Cherokee Six - Page 397

Leakage
through
engine
fuel
pump
vent.
Engine
breather
or
vacuum
pump
breather.
Low
grade
of
oil.
Failure
of
rings
to
seat
(new
nitrided
cylinders).
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
TABLE
VII-ll.
ENGINE
TROUBLESHOOTING
(cont.)
Cause
Trouble
Remedy
Excessive
oil
con-
sumption.
(cont.)
External
oil
leakage.
Check
engine
carefully
for
leaking
gaskets.
"0"
rings
or
sand
holes.
Replace
fuel
pump
"O"
ring.
Check
engine
and
over-
haul
or
replace
pump.
Replace
with
oil
conform-
ing
to
specifications.
Use
mineral
base
oil.
Climb
to
cruise
altitude
at
full
power
and
operate
at
75%
cruise
power
setting
until
oil
consumption
stabilizes.
Overpriming.
Cold
weather.
Rotate
the
crankshaft
in
the
counterclockwise
direction
with
throttle
FULL
OPEN
and
ig-
nition
switch
OFF.
Inaccurate
pressure
readings.
Cold
weather.
Oil
pressure
readings
up
to
100
pounds
are
not
unusual.
High
or
low
pressure
readings
due
to
extremely
cold
weather
are
not
necessarily
a
malfunction.
Small
and
long
oil
lines
will
not
transfer
pressure
readings
accurately
until
engine
is
quite
warm.
Issued:
8/17/72
POWER
PLANT
2G1