Continental Motors TSI0L-550-C Operation, Maintenance & Installation Manual page 195

Compression Test Troubleshooting
Use the following troubleshooting chart as a guide. Review the probable causes and other listings of problems
that have similar symptoms. The probable causes are listed in order of "easiest to find" which is not
necessarily in order of probability of occurrence.
First Check
Static seal
(No leakage
Permissible)
Second Check
Dynamic seal
Perform all corrective actions in accordance with "Cylinder Assembly Maintenance" in this chapter.
Check For
Intake valve to seat seal Listen to air flow
in intake port
Exhaust valve to seat seal Listen for air flow
in exhaust port
Spark plug (2) to port seal Apply soapy solution
around spark plug
Cylinder head to barrel Apply soapy solution
seal between head and
barrel
Cylinder head cracks Apply soapy solution
around cylinder head area
Check For
Leakage by piston rings Test gauge below
remove oil filler cap, tolerance
listen
Test gauge above
tolerance
Method Discrepancy
Carbon
Cracked cylinder
Seat worn or burned
Valve worn or burned
Carbon
Cracked cylinder
Seat worn or burned
Valve worn or burned
Loose helical coil
Cracked cylinder
Bubbles
Bubbles
Method Discrepancy
Piston cracked or out
of limits
Worn rings
Cylinder wall dimensions
out of limits
None
Cylinders
Corrective
Action
Stake valve
Replace cylinder
Reface or replace
Reface or replace
Stake valve
Replace cylinder
Reface or replace
Replace
Replace helical coil
Replace cylinder
Replace cylinder
Replace cylinder
Corrective Action
Replace piston
Replace rings
Replace cylinder
None
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