Overhaul Manual
O-360 and IO-360 Series Engines
Cylinder Assembly Installation to Engine
(1) Lubricate the rings and ring grooves on
the piston with straight weight, non-
detergent (mineral) aviation grade oil.
(2) Stagger the ring gaps as follows: Top
ring gap is at approximately the 10
o’clock position, 2nd ring gap is at
approximately 2 o’clock; and the oil
control ring gap is at approximately 11
o’clock.
WARNING
: LUBRICANTS ARE TOXIC AND
FLAMMABLE. DO NOT BREATHE VAPORS.
BEFORE YOU USE, READ THE MATERIAL
SAFETY DATA SHEET (MSDS) FROM THE
MANUFACTURER OR SUPPLIER. USE IN A
WELL-VENTILATED AREA FREE FROM
SPARKS. WEAR PROTECTIVE GEAR. IN
CASE OF EYE CONTACT, FLUSH WITH
WATER FOR 15 MINUTES AND SEEK
MEDICAL ATTENTION. IN CASE OF SKIN
CONTACT, WASH WITH SOAP AND WATER.
NOTE:
Oil control expander spring is installed
in piston groove underneath the oil
control ring and with its split line 180°
from the ring gap.
(3) Lubricate the cylinder bores, piston pins
and piston pin bushing in connecting rod
with straight weight, non-detergent
(mineral) aviation grade oil.
(4) Lubricate the cylinder base o-ring (5,
Figure 72-00-09.17) with oil and install
over the cylinder base.
(5) Lightly lubricate cylinder deck studs and
through bolts with pre-lube oil.
(6) Rotate the engine so that the #1
connecting rod is at the top of the
stroke. Install the #1 piston to the #1
connecting rod with the piston pin.
Refer to Figure 72-00-09.16.
NOTE:
Ensure that piston is installed with ring
gaps towards the top of the engine.
(7) Slide the ring compressor tool over the
piston and rings far enough to allow the
cylinder bore to fit over the piston top.
(8) Install cylinder #1: Position the top of
cylinder facing the top of the engine
over the piston. Push on until the ring
compressor is pushed off the piston skirt
and can be removed at notch over the
connecting rod. Continue to slide the
cylinder over the cylinder base studs
until flush with the case deck. Refer to
Figure 72-00-09.18.
(9) Secure the cylinder assembly with the
cylinder base nuts (15, 20, Figure 72-
00-09.17) as required and tighten to
snug.
(10) Continue process with cylinders #2, then
#3, and #4 in that order. Rotate the
case and crank so that the connecting
rod of the cylinder to be installed is at
top dead center.
(11) Torque the large cylinder hold down
nuts (15, Figure 72-00-09.17) to 600 in-
lbs. Torque the small hold down nuts
(20) to 300 in-lbs. Do this in the
sequence shown in Figure 72-00-09.19.
(12) Torque all crankcase assembly
hardware in accordance with Fits and
Clearances Table 72-00-11.2. Do this in
the sequence shown in Figure 72-00-
09.19.
WARNING
: PUT ON SAFETY GOGGLES
WHEN INSTALLING OR REMOVING SAFETY
WIRE.
(13) Torque slotted 0.38 in. nut (85) to 300
in-lbs. Install safety wire (0.041 in.) at
accessory location by cam gear.
(14) Torque the three, drilled-shank, 0.25 in.
belly bolts (95) and slotted nuts (100) to
55-60 in-lbs. Install safety wire (0.032
in.).
24
© March 2005 Superior Air Parts Inc.
72-00-09
Engine Assembly
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