Exhaust System Installation - Lycoming TEO-540-C1A Maintenance Manual

CAUTION
(3) Identify the locations of V-band couplings, clamps, and adapters.
C. Disconnect the wiring harness from the Exhaust Gas Temperature (EGT) and Turbine Inlet
Temperature (TIT) sensor leads per instructions in the "Sensor Replacement Procedures"
section in Chapter 72-70.
D. Secure the sensor leads with cable ties to prevent damage during disassembly and assembly.
E. Remove the V-band couplings from both sides of the exhaust transition (Figure 3).
F. Remove and discard the gasket from each of the removed V-band couplings.
G. Loosen the clamps on the heat shield (Figure 1) and remove the heat shield at the joint
between the right rear exhaust pipe and the intermediate crossover pipe.
CAUTION
H. While one person removes the self-locking nuts and washers (Figure 3) from the vertical
portion of the three exhaust pipes on the 2-4-6 (even numbered) cylinder side of the engine,
two people lower and remove the exhaust pipes and put them on a clean work surface.
Discard the self-locking nuts and gasket from each exhaust pipe flange at the cylinder head.
I. Repeat the previous step for the three exhaust pipes on the 1-3-5 (odd-numbered) cylinder
side of the engine (Figure 3).

7. Exhaust System Installation

CAUTION CRACKS AS WELL AS INCORRECT ASSEMBLY OR INSTALLATION OF
THE EXHAUST SYSTEM CAN ADVERSELY AFFECT ENGINE
OPERATION, OR RESULT IN THE RELEASE OF HOT TOXIC GASES
WHICH CAN CAUSE A FIRE AS WELL AS DAMAGE TO NEARBY
COMPONENTS.
A. Clean all exhaust pipes between exhaust manifold connections and at all slip joints with a
scuff pad. Remove all debris. Make sure the connecting/mating surfaces at slip joints are
clean and that there is no residual debris.
B. Examine all of the exhaust pipes and saddle welds for cracks, bulges, dents, damage, and
correct fit. Replace any component that is cracked, bulged, dented, damaged or does not fit
correctly.
C. Apply C5A Copper Based Anti-Seize or equivalent to the threads on the exhaust studs.
NOTICE: Beaded exhaust flange gaskets must be assembled (two each per exhaust port
flange) with their beads interlocking (Figure 8). The flat side of the gasket must face
toward the cylinder head and the raised or bead side, toward the exhaust stack.
(Refer to the latest revision of Service Instruction SI-1204 for exhaust flange gasket
information.)
78-00
Page 348
DO NOT USE ETCH TOOLS, GRAPHITE LEAD PENCIL, OR SCRIBE TO
MARK EXHAUST PIPES. FOR BEST RESULTS, USE A NONGRAPHITE
MARKER SUCH AS COLORBRITE NOS. 2127, 4127, OR MARKS-A-
LOT.
AS A SAFETY PRECAUTION, USE THREE PEOPLE TO COMPLETE
THE NEXT STEPS TO PREVENT INJURY AND PARTS FROM
FALLING.
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
© 2018 Avco Corporation. All Rights Reserved
November 2018