Engine; Engine Oil System - Cirrus SR22 Pilot Operating Handbook

Cirrus Design
SR22

Engine

The SR22 is powered by a Teledyne Continental IO-550-N, six-
cylinder, normally aspirated, fuel-injected engine rated to 310 hp at
2700 RPM. The engine has a 2000-hour Time Between Overhaul
(TBO). Dual, conventional magnetos provide ignition.
Serials 0002 through 0819 before Service Bulletin SB 2X-71-06; The
engine is attached to the firewall by a four-point steel engine mount.
Serials 0002 through 0819 after Service Bulletin SB 2X-71-06 and
airplane serials 0820 and subsequent: The engine is attached to the
firewall by a six-point steel engine mount.
The firewall attach points are structurally reinforced with gusset-type
attachments that transfer thrust and bending loads into the fuselage
shell.

Engine Oil System

The engine is provided with a wet-sump, high-pressure oil system for
engine lubrication and cooling. Oil for engine lubrication is drawn from
an eight-quart capacity sump through an oil suction strainer screen
and directed through the oil filter to the engine-mounted oil cooler by a
positive displacement oil pump. The oil pump is equipped with a
pressure relief valve at the pump output end to bypass oil back to the
pump inlet should the pump exceed limits. The oil cooler is equipped
with a temperature control valve set to bypass oil if the temperature is
below 180°F (82° C). Bypass or cooled oil is then directed through oil
galleries to the engine rotating parts and piston inner domes. Oil is
also directed to the propeller governor to regulate propeller pitch. The
complete oil system is contained in the engine. An oil filler cap and
dipstick are located at the left rear of the engine. The filler cap and
dipstick are accessed through a door on the top left side of the engine
cowling.
The engine should not be operated with less than six quarts of
oil. Seven quarts (dipstick indication) is recommended for
extended flights.
P/N 13772-001
Revision A5
• Caution •
Section 7
Airplane Description
7-41