Corrective Action For Valve Sticking - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
(3) Install and tighten a hose clamp on the hose as follows: for Cylinder Nos. 1 and 2, face
towards the front of the engine; for the remaining cylinders, install the hose clamp face
towards the rear of the engine (Figure 47).
(4) Connect the oil drain tube to the elbow fitting at the cylinder with a flange nut. Torque
the nut per instructions in the latest revision of the Service Table of Limits - SSP-1776.
(5) Connect the oil drain tube to the installed new hose and install a hose clamp.
(6) Torque both hose clamps per instructions in the latest revision of the Service Table of
Limits - SSP-1776
(7) Tighten the drain tube coupling to the fitting finger tight, plus ½ to ¾ turn. Adjust the
cylinder head drain fitting as necessary for alignment. Make sure the oil drain tubes are
not touching the intercylinder baffles or cylinders.

16. Corrective Action for Valve Sticking

NOTICE: If valve sticking is a problem, complete the 1000-hour inspection (regardless of the
number of engine operating hours). After correcting the cause of valve sticking,
complete the 1000-hour inspection after the next 1000 hours of engine operation, unless
valve sticking occurs again.
Sticking between the valve stem and guide (on intake and exhaust valves) can
substantially change valve opening and closing. If the valve cannot open or close
correctly, incomplete combustion will occur, which can cause formation of more
deposits and increased valve sticking. Because a correctly-timed sequence of valve
opening and closing is essential to efficient and reliable engine operation, the cause of
valve sticking must be identified and corrected.
WARNING A STUCK VALVE CAN CAUSE ENGINE FAILURE.
NOTICE: If one valve is sticking, examine all other valves on all of the engine cylinders as a
precaution.
A. Per Chapter 12-10 complete an oil and filter change and have an analysis done on the
metallic solids in the oil filter to identify the contamination and find the source to correct the
problem. Refer to the latest revision of Service Bulletin No. SB-480.
B. If the source of the oil contamination cannot be found or corrected, complete the following
procedures in Chapter 12-10:
(1) Replace the oil filter (more often) after every 25 hours of operation (instead of after every
50 hours of engine operation.)
(2) Complete an oil change after every 25 hours of operation (instead of after every 50 hours
of engine operation.)
C. Complete an air filter change at more frequent intervals and apply a cover over the induction
system to keep dirt out of the oil supply.
D. Examine the cooling air baffles and baffle strips for contamination. Remove any
contamination.
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November 2018
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