PISTONS - RINGS - RODS
Disassembly
Section 9
PISTONS - RINGS - RODS
Remove Piston and Connecting Rod
To remove the piston and connecting rod from the
engine, bend down connecting rod lock. Fig. 1. Remove
the connecting rod cap. Remove any carbon or ridge at
the top of the cylinder bore; this will prevent breaking of
the rings. Push the piston and rod out through the top of
the cylinder.
Fig. 1. Bending Rod Lock
Pistons used in sleeve bore aluminum alloy engines are
marked with an "L" on top of the piston. Fig. 2. Illus. 1.
These pistons are tin plated. This piston assembly is
NOT INTERCHANGEABLE with the piston used in
aluminum bore (KOOL BORE) engines.
Pistons used in aluminum bore (KOOL BORE) engines
are NOT marked on top of the piston.
Fig. 2. Illus. 2. The piston is chrome plated and is not to
be used in a sleeve bore engine.
Fig. 2. Piston Variations
Remove Connecting Rod
To remove connecting rod from piston, remove piston
pin lock with thin nose pliers. One end of the pin is
drilled to facilitate removal of the lock. Fig. 3.
Remove rings one at a time as shown in Fig. 4, slipping
them over the ring lands. Use a ring expander to prevent
damage to rings and piston.
Fig. 3. Removing Rod
Fig. 4. Removing Rings
Check Piston
If the cylinder is to be resized, there is no reason to
check the piston, since a new oversized piston assembly
will be used.
If, however, the cylinder is not to be resized, and the
piston shows no signs of wear or scoring, the piston
should be checked.
OCTOBER 1978
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