Continental Motors A Series Operator's Manual page 47

Proper procedures require thorough application of preheat to al1
parts of the engine. Hot air should be applied directly to the oil
sump and external oil lines as well as the cylinders, air intake and
oil cooler. Excessively hot air can damage non-metallic
components such as seals, hoses and drive belts, so do not attempt
to hasten the preheat process.
Before starting is attempted, turn the engine by hand or starter
until it rotates freely. After starting, observe carefully for
high
or
low oil pressure and continue the warm-up until the engine
operates smoothly and all controls can be moved freely. Do not
close the cowl flaps to facilitate warm-up as hot spots may develop
and damage ignition wiring and other components.
2. Hot air should be applied primarily to the oil sump and filter (if
installed) area. The oil drain plug door or panel may provide access
to these areas. Continue to apply heat for] 5 to 30 minutes and
turn the propeller, by hand, through 6 to 8 revolutions at 5 or 10
minute intervals.
3. Periodically feel the top of the engine and, when some
warmth is noted, apply heat directly to the upper portion of the
engine for approximately five minutes. This will provide sufficient
heating of the cylinders and fuel lines to promote better
vaporization for starting. If enough heater hoses are available,
continue heating the sump area. Otherwise, it will suffice to
transfer the source of heat from the sump to the upper part of the
engine.
4. Start the engine immediately after completion of the
preheating process. Since the engine will be warm, use normal
starting procedure.
NOTE . . . Since the oil in the oil pressure gauge line may be
congealed, as much as 60 seconds may elapse before oil pressure is
indicated. If oil pressure is not indicated within one minute, shut
the engine down and determine the cause.
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