Installation & Operation Manual
O-360 and IO-360 Series Engines
11 Chapter 3 • Aircraft / Engine
© March 2004 Superior Air Parts Inc. Integration Considerations
(6.) EGT Probes
Exhaust gas temperature (EGT) probes are
commonly added to engine installations to
provide engine management information to the
pilot. The location of the probes is important to
the accuracy of their information. EGT probes
should be located approximately 6” from the
exhaust port flange and equidistant among all
cylinders.
C. Exhaust System Materials
Exhaust pipes and mounting hardware should
be made of corrosion resistant materials such as
Inconel or 321 or 347 stabilized stainless steel.
Other materials, such as 304 stainless steel are
not stabilized for sustained high temperatures
and may result in carbide precipitation and early
fatigue failure. Wall thickness should be large
enough to provide structural integrity yet thin
enough to maintain reduced weight. Historically,
some exhaust systems have been made with
thicker material to withstand material loss due to
scaling and oxidation. Proper material selection
however has been shown to be a more effective
solution allowing for lighter weight exhaust
systems.
D. Exhaust Gaskets
Superior recommends the use of metal gaskets
in the installation of exhaust systems. Metal
gaskets improve the seal to the exhaust port
reducing the possibility for exhaust gas leakage
as well as noise leaks. Gaskets also improve
the thermal conductivity from the head to the
exhaust pipe that helps to remove heat from the
exhaust area of the head. Exhaust gaskets
should be made of corrosion resistant materials
such as Inconel or stainless steel and should be
designed to withstand the pressure of exhaust
backfire events.