Teledyne Continental Motors, Inc.
TM
Troubleshooting
8-11.1. Excessive Crankcase Pressure
Excessive crankcase pressure
Bypass the Air/Oil Separator with
tubing. Repeat engine run.
Remove the timing plug from the
crankcase. Temporarily install a
crankcase pressure plug connected
to an airspeed indicator
(manometer). Torque the fittings
(App B).
Remove the oil fill cap from the oil
fill tube. Temporarily install a
modified oil fill cap connected to an
airspeed indicator (manometer).
OR
Air/Oil
Separator
Installed?
Perform ground engine run.
Monitor airspeed indicator. The
table at right indicates
representative simulated airspeed
versus gauge pressure.
Water Pressure
1.23
1.77
2.42
3.16
4.0
4.94
7.131
9.729
Airspeed
50
60
70
80
90 (max. gnd speed)
100
120
140
Replace the Air/Oil Separator.
OK
YES
Bypass the crankcase breather
system; repeat engine run.
Remove obstruction from the
crankcase breather system;
repeat engine run.
HIGH
INDICATED
PRESSURE
NOT
OK
OK
Replace the oil filler cap
(bad seal)
Replace the nose oil seal
(Sect. 10)
CAN NOT
DUPLICATE
ON
GROUND
PROBLEM
PERSISTS
Perform Cylinder Differential
Pressure Test (Sect. 7-3.6)
NO
NOT
OK
8-11.2. Crankcase Accessories
8-12.
Exhaust System
The IOF-550 Exhaust System is an airframe component. Refer to the airframe
manufacturer’s troubleshooting procedures.
IOF-550 Permold Series Engine Maintenance Manual
8-35
1 April 2007