Out-of-Chassis
Diagnostic
Procedures
Page9H-2
Base
Engine
Components
DODGE
Engine
Components
Piston
and Rod Assembly
There
are a number of power related problems including
excessive
oil consumption, smoke, blow-by and poor
performance
that
can be
caused
by inadequate sealing
between the piston rings and the cylinder walls. A blowby
measurement
can
help detect the problem.
Verification of the damaged or worn component requires
visual/dimensional
inspection of rings,
pistons
and cylinder
walls.
The
cause
of piston ring wear can range
from
wear over a long
period of
service
to a dust-out in a short period of
time
because
of poor maintenance of the air intake
system.
During repair It Is essential
that
the cylinder wall be de-
glazed so
that
new rings
will
seat against the cylinder
wall.
Failure of the rings to seat can result in high blow-
by and
excessive
oil consumption.
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