Lycoming TEO-540-C1A Maintenance Manual page 379

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
NOTICE: After initial installation of a new beaded exhaust flange gasket, retorque the exhaust
flange nuts after the first 25-hours of engine operation to allow for permanent
seating of the beads. The beaded exhaust flange gasket cannot be reused. Replace
this beaded gasket with a new gasket after each removal.
D. Install two new beaded exhaust flange gaskets to replace the discarded gaskets.
E. Install the exhaust flange with two new self-locking nuts and washers.
F. Begin assembly of the exhaust system at the front of the engine and continue to the rear of
the engine.
NOTICE: Make sure the connecting/mating surfaces at slip joints are clean, and that there is
no debris.
G. Apply a uniform coating of C5A Copper Based Anti-Seize or equivalent around the entire
circumference of exhaust pipes, between the exhaust manifold connection, and at all slip
joints (to minimize binding).
H. Refer to the photo or sketch done before disassembly to ensure correct assembly and
installation of the exhaust pipes.
CAUTION
I. Install exhaust system parts with hardware fasteners finger-tight to allow for adjustment in
the next step.
J. Align exhaust pipes in the correct configuration (per your photo or sketch) to enable
engagement of the slip joints at the same distance for each joint. If there is binding at a slip
joint or pipes at the V-band coupling are not aligned, loosen and re-install the components
until they align correctly.
CAUTION
K. If there is a flared end of the exhaust pipe, install the flared end over the smaller end of the
connecting exhaust pipe.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Exhaust Flange Gasket
WHEN INSTALLING EXHAUST SYSTEM COMPONENTS, INITIALLY
TIGHTEN HARDWARE FASTENERS FINGER-TIGHT. DO NOT
TIGHTEN ANY PART OF THE EXHAUST SYSTEM BEFORE
PROCEEDING TO ANOTHER PART ON THE SAME SIDE OF THE
ENGINE.
DURING REPLACEMENT OF ANY EXHAUST PIPE, ALL OF THE
FLANGE SURFACES MUST BE ACCURATELY ALIGNED. IF
CROSSOVER EXHAUST COMPONENTS ARE INCORRECTLY
ALIGNED, THEY CAN CAUSE TOO MUCH STRESS ON THE FLANGES
OF THE CROSSOVER EXHAUST PIPES AND CAUSE GAS LEAKAGE
AT SLIP JOINTS AND FLANGE JOINTS.
Figure 8
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