Maintenance Inspections
Teledyne Continental Motors, Inc.
TM
7-24
IOF-550 Permold Series Engine Maintenance Manual
1 April 2007
Manual/Pilot’s Operating Handbook, for at least forty five minutes
to allow the engine oil and cylinder head temperatures to stabilize.
Perform an additional Differential Pressure Test on the suspect
cylinder(s).
To inspect the static seals of a cylinder that has been removed (and still has the spark
plug installed), invert the cylinder and fill the bore with nonflammable solvent and
inspect for leaks at the static seals. Replace any cylinder with static seal leaks.
Table 7-4.
Summary of Seal Checks and Corrective Actions
Check
Area to Check
How to Check
Finding
Corrective Action
Dynamic
Seal Check
Piston ring
Test gauge below
tolerance
Piston cracked or out
of limits
Replace piston.
Worn rings
Replace rings.
Cylinder
wall
dimensions out of
limits
Replace cylinder.
Test
gauge
above
tolerance
None None.
Static Seal
Check*
Spark Plug-to-Port
Seal
Apply soapy solution
around spark plug
Loose helical coil
Replace helical coil.
Cracked cylinder
Replace cylinder.
Cylinder
Head-to-
Barrel Seal
Apply soapy solution
between cylinder
head and barrel
Bubbles Replace
cylinder.
Cylinder
Head
Cracks
Apply soapy solution
around fins
Bubbles Replace
cylinder.
Intake
Valve-to-Seat
Seal
Listen for air flow in
intake port
Carbon Stake
valve.
Cracked cylinder
Replace cylinder.
Seat worn or burned
Grind or replace and
re-inspect.
Valve worn or burned Grind or replace and
re-inspect.
Static Seal
Check
Exhaust Valve-to-
Seat Seal
Listen for air flow in
exhaust port
Carbon Stake
valve.
Cracked cylinder
Replace cylinder.
Seat worn or burned
Grind or replace and
re-inspect.
Valve worn or burned Replace and re-
inspect.
* No leakage allowed