Economy Mixture Indicator (Egt); Inspection - Cessna T182 Series Service Manual

MODEL 182 & T182 SERIES SERVICE MANUAL
The tailpipe is welded to the muffler. A shroud is
tions, inspection is important and should be accom-
attached to the left exhaust stack to provide heated plished every 50 hours of operation. Also. a thor-
air for the carburetor heat source. ough inspection of the engine exhaust system should
11-96. ECONOMY MIXTURE INDICATOR (EGT)
be made to detect cracks causing leaks which could
Refer to Section 15. result in loss of engine power.
To inspect the engine
11-97. REMOVAL AND INSTALLATION. (Refer to
exhaust system, proceed as follows:
figure 11-8.)
a. Remove engine cowling as required so that ALL
a.
Remove engine cowling in accordance with para- surfaces of the exhaust assemblies can be visually
graph 11-3.
inspected.
b. Disconnect ducts from heater shroud on muffler
assembly. NOTE
c. Disconnect duct from shroud on left exhaust
stack assembly.
Especially check the areas adjacent to welds
and slip joints. Look for gas deposits in sur-
NOTE
rounding areas, indicating that exhaust gases
are escaping through a crack or hole or around
If the aircraft is equipped with a carburetor the slip joints.
heat shroud modification kit, SK182-78, the
shroud is attached to the engine mounts and b. After visual inspection, an air leak check should
must be removed before removing the ex-
be made on the exhaust system as follows:
haust system from the engine. Effected 1. Attach the pressure side of an industrial
Serials include: 18265176 thru 18268320 and vacuum cleaner to the tailpipe opening, using a rub-
F18200026 thru F18200169.
ber plug to effect a seal as required.
d. Remove nuts, bolts and clamps attaching stack NOTE
assemblies to the muffler.
e. Loosen nuts attaching exhaust stacks to the
The inside of vacuum cleaner hose should be
cylinders and remove muffler assembly.
free of any contamination that might be blown
f.
Remove nuts attaching exhaust stack assemblies into the engine exhaust system.
to the cylinders and remove exhaust stacks and gas-
kets.
2. With vacuum cleaner operating, all joints
g.
Reverse the preceding steps for reinstallation.
in the exhaust system may be checked manually by
Install a new gasket between each riser and its mount-
feel, or by using a soap and water solution and
ing pad on each cylinder, regardless of apparent cond- watching for bubbles. Forming of bubbles is con-
ition of those removed. Torque exhaust stack nuts at
sidered acceptable, if bubbles are blown away
cylinders to 100-110 in-lbs.
system is not considered acceptable.
c. Where a surface is not accessible for a visual
11-98. INSPECTION. Since exhaust systems of this
inspection, or for a more positive test, the following
type are subject to burning, cracking and general de-
procedure is recommended.
terioration from alternate thermal stresses and vibra-
Revision 1 11-31