Teledyne TSIO-360-RB, Maintenance Manual

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20-8
20-4 CYLINDER ASSEMBLY INSPECTION (cont'd)
Inspect for corrosion and pitting on the cylinder head, the head fins and fin roots. Inspect the
cylinder head for cracks. A radial fin crack extending to the root of a fin may have penetrated
the dome wall. Discard cylinders exhibiting any of the above indications.
CAUTION. . . Corrosion pits reduce wall thickness and will cause stress concentrations and
subsequent fracture. Discard cylinders that have been allowed to become pitted in the
areas mentioned in cylinder barrel and head inspections above.
Inspect for evidence of cylinder head to barrel leakage. Inspect for possible turning of the
cylinder head in relation to the barrel flange. Cylinders with this indication must be
discarded and replaced with a serviceable cylinder assembly.
Visually inspect pushrod housings for cracks and dents. Discard cracked or dented
pushrod housings.
WARNING
Welding of the cylinder head structure can destroy the assembly preloads and
casting strength resulting in cylinder assembly failure.
100 HOUR - Perform all visual inspection requirements of 50 hour inspection. Perform the
following cylinder compression test which is to be done soon after the operational engine
test in Section 5-4.
Cylinder Compression Test - The differential pressure test is an accepted method of
determining cylinder condition by measuring air pressure loss past the pistons, rings and
valves. The operation of the equipment is based on the principle that, for any given airflow
through a fixed orifice, a constant pressure drop across that orifice will result.
The compression testing equipment must be calibrated and used in the proper manner to
insure accurate results.
To accurately accomplish a leakage check, use the following information on leakage and
use the Master Orifice tool to calibrate the leakage checking equipment used on Teledyne
Continental engines.
FACTORY CALIBRATED ORIFICE
(CLEAN With Soft Brush. Do Not Alter Size)
SPARK PLUG
THREADS (18mm)
DUST CAP DUST CAP
FIGURE 20-7. MASTER ORIFICE TOOL (For procurement, see chapter 2)