Overhaul Manual
O-360 and IO-360 Series Engines
CONNECTING ROD WITH HOLD DOWN
PLATES TOOL OR RUBBER BANDS (OR
DISCARDED CYLINDER BASE SEALS)
LOOPED AROUND THE CYLINDER BASE
STUD.
(3) Remove the piston pin (35, Figure 72-
00-09.6) using a piston pin drive tool.
Drive pin (35) from piston to remove
piston (30) from the connecting rod (5).
NOTE:
Removal of the remaining cylinders
and pistons may be done in any
sequence, but less turning of the
crankshaft is involved if the cylinders
are removed in firing order 1-3-2-4.
(4) Compress valve springs (90, 95, Figure
72-00-09.15) with spring compressor
tool, while supporting cylinder, far
enough to remove the valve cylinder
keys (105, 110).
NOTE:
If the valve keys are stuck in the spring
seat, a light blow with a leather mallet
on top of the compressor tool will
release keys.
CAUTION
: DO NOT DRIVE THE VALVES
THROUGH THE GUIDES.
(a) Remove upper valve spring seats
(95, 100), inner and outer springs
(85, 90), and lower valve spring
seats (75, 80) from rocker box.
Keep parts for each valve (65, 70)
separate. Hold valves by the stems
to keep them from dropping out of
the cylinder and remove cylinder
from the holding block. Reach
inside and remove valves. If valves
are difficult to remove, push valves
back in and clean carbon from
stems.
CAUTION
: BE CAREFUL NOT TO SCRATCH
OR SCORE PISTONS WHEN REMOVING THE
RINGS.
(b) Using the piston ring expander tool,
remove the rings (40, 45, Figure 72-
00-09.6) from all pistons. Remove
the rings in order starting with the
top ring and work down.
(5) Remove and disassemble the hydraulic
lifter assembly.
CAUTION
: MAINTAIN THE PARTS OF EACH
TAPPET ASSEMBLY TOGETHER DURING
ALL OVERHAUL OPERATIONS. ALL
COMPONENT PARTS ARE TO BE
REASSEMBLED WITH THEIR ORIGINAL
MATING PARTS AND EACH ASSEMBLY
REINSERTED IN ITS ORIGINAL LOCATION.
(a) Using hydraulic tappet tool, remove
the pushrod socket (30, Figure 72-
00-09.15) by placing heavy grease
on ball end of the "T". By inserting
the ball end in the tappet and
withdrawing, the socket will adhere
to the grease.
(b) Using the hollow end of the tool,
push it over the plunger and
withdraw the plunger. If the tool is
not available, remove the pushrod
socket with fingers or by using
needle nose pliers. Insert a piece of
wire bent at a right angle into the
plunger between the plunger and
the lifter body. Turn 90 degrees to
engage a coil of spring and draw out
the plunger assembly.
Crankcase Disassembly
(1) Remove nuts (25, 45, 70, 85, Figure 72-
00-09.11 and 72-00-09.12), bolts (5, 30,
55, 90, 95), and washers (15, 20, 35,
40, 60, 65, 80). Draw or pull the thru-
bolts (1) from the crankcase using
cylinder base nuts and washers and/or
spacers.
(2) Separate crankcase using care not to
allow camshaft to fall to floor. Caution
should be used to keep the right case
thru-studs from becoming misaligned
when separating the crankcase halves
(60, Figure 72.00-09.5).
NOTE:
Carefully pull crankshaft nose seal
from crankcase forward on crankshaft
to aid in crankcase half separation.
5
© March 2005 Superior Air Parts Inc.
72-00-06
Engine Disassembly
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