EXPANDER
OIL CONTROL RING
Wrong
SPIRAL RAIL
INSTALLATION
I
I
FIGURE 10
-
8
--
INSTALLATION OF
K662
OIL CONTROL RING WITH SPIRAL RAIL
PISTON
-
PISTON RINGS
1.
If the cylinder block does not need reboring and if the old piston is within wear limits and free of
score
or
scuff marks,
it
may be reused. Do not reuse old rings, however. Oversize pistons and ring
sets are available in
,010,
,020
and
.03OU
sizes for use with rebored cylinders.
,003
oversize
pistons are available and are used with the standard size service ring
set.
2.
Remove old rings with ring expander and clean up grooves.
3.
Before installing new rings on piston, place each ring in turn in its running area in cylinder bore
and check end clearance.
4.
Rings must be installed according to markings on rings.
Generally compression rings must be
installed with groove or bevel up when this is on inside diameter of ring.
The chrome plated
ring, when used, must be installed in the top groove.
When the bevel
is
on outside of ring,
install in down position or toward the piston skirt.
Refer to Figure
10
-
7
for typical ring types
and installation in grooves. Ring installation instructions are also included with new ring sets
either printed on the carton or on a printed sheet included in container.
Follow instructions
carefully. Use ring expander to
lnstall rings and check side clearance of each ring after instal
-
lation.
Be careful not to overexpand rings when installing on piston.
PISTON
-
ROD ASSEMBLIES
Normally very little wear takes place in the piston boss
-
piston area.
If
the original piston and
connecting rod can be reused after reconditioning, the pin will usually not have to be replaced.
If the piston boss or connecting rod small end
is
worn beyond limits, use a new piston
-
rod
assembly rather than rework the old piston boss and connecting rod.
A
new piston pin should he used
when a new connecting rod is used with the original piston.
After checking pin,
rod and piston boss to make sure proper clearances are available,
assemble
piston to rod with pin (light interference to toose fit) and lock pin with new retainers
--
make sure
retainers are fully engaged in grooves.
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