New Engine Break-In And Operation; Engine Oil System - Cessna 182Q 1979 Pilot Operating Handbook

SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
CESSNA
MODEL 182Q
An economy mixture {EGT)iP,.c;l.~<?_~~()I'isavailable f or the airplane and
is located on the rightside-'oftlle instrument panel. A thermocouple probe
in the right exhaust stack assembly measures exhaust gas temperature
and transniIisiTiotheTndlcator:-The indicator serves as a visual aid to the
pilot in adjusting cruise mixture. Exhaust gas temperature varies with
fuel-to-air ratio, power, and RPM. However, the difference between the
E.~.~~_~Q-!:_~~<:!.~~~_~.Q:'.r~~_~!!e
c ruise mixture setting is essentially constant
and th(~_p-rovid~s a useful leaning aid. The indicator is equipped with a
manually positioned reference pointer.
A carburetor air temperature gage is available for the airplane. Details
of this gage are presented in Section 9, Supplements.
NEW ENGINE BREAK-IN AND OPERATION
The engine underwent a run-in at the factory and is ready for the full
range of use. It is, however, suggested that cruising be accomplished at
75% power until a total of 50 hours has accumulated or oil consumption has
stabilized. This will ensure proper seating of the rings.
The airplane is delivered from the factory with corrosion preventive
oil in the engine. If, during the first 25 hours, oil must be added, use only
aviation grade straight mineral oil conforming to Specification No. MIL-
L-6082.
ENGINE OIL SYSTEM
Oil for engine lubrication and propeller governor operation is supp-
lied from a sump on the bottom of the engine. The capacity of the sump is 12
quarts (one additional quart is required if a full flow oil filter is installed).
Oil is drawn from the sump through a filter screen on the end of a pickup
tube to the engine-driven oil pump. Oil from the pump passes through an
oil pressure screen (full flow oil filter, if installed), a pressure relief valve
at the rear of the right oil gallery, and a thermostatically controlled oil
cooler. Oil from the cooler is then circulated to the left gallery and
propeller governor. The engine parts are then lubricated by oil from the
galleries. After lubricating the engine, the oil returns to the sump by
gravity.
If
a full flow oil filter is installed, the filter adapter is equipped
with a bypass valve which will cause lubricating oil to bypass the filter in
the event the filter becomes plugged, or the oil temperature is extremely
cold.
An oil dipstick is located at the rear of the engine on the left side, and an
oil filler tube is on top of the crankcase near the front of the engine. The
dipstick and oil filler are accessible through doors on the engine cowling.
7-18
1 October 1978