CRANKSHAFT
CRANKSHAFT
GEAR
THESE
MARKS
MUST
AUGN
WHEN
INSTALLING
TIMING
GEARS
v-r-1029-01
FIGURE
15.
TIMING GEAR REMOVAL AND INSTALLATION
PISTONS
AND
CONNECTING
RODS
Observe the following procedure when removing pistons
and connecting rods from the engine.
1.
Drain oil.
2. Remove the cylinder head and oil base pan from the
engine.
3.
Remove the ridge from the top of each cylinder with
a ridge reamer before attempting piston removal
(Figure 12).
1-
Improper piston removal can
cause piston damage. Use ridge
reamer
to
remove cylinder ridge beiore removing
pis ton.
f
I
I
I
'i
(1
d
I1
1
I
FIGURE
12.
REMOVING RIDGE FROM CYLINDER
4.
Turn the crankshaft until the piston
is
at the bottom
of its stroke and remove the connecting rod nuts.
Lift
the rod bearing cap from the rod and push the rod
and piston assembly out through the top
of
the
cylinder using a hammer handle.
Do
not scratch the
crankpin and cylinder wall when removing the
piston and rod.
5.
Mark each piston and rod assembly
so
they can be
returned to their respective cylinders after overhaul.
Keep connecting rod bearing caps with their
respective rods.
6.
Remove the piston rings from the piston with a
piston ring spreader (Figure 13). Remove the piston
pin retainer and push the piston pin
out.
I
FIGURE
13.
REMOVING PISTON RINGS
7.
Remove dirt and deposits from the piston surfaces
with an approved cleaning solvent. Clean the piston
ring grooves with a groove cleaner or the end of a
piston ring filed to a sharp point (Figure
14).
Care
must be taken not to remove metal from the groove
sides.
Improper piston cleaning can
cause piston damage.
Do
not
use a caustic cleaning solvent or wire brush for
.
cleaning pistons.
8.
Clean the connecting rods in solvent. Blow out all
passages with compressed air.
P224
Engines that have been filled with
0.005
inch
(0.13
mm)
oversize pistons at the factoryare identified by the letter
E
after the serial number. Number
is
stamped on the
cylinder block and on the unit nameplate.
10-8
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