Advertisement
Measuring Compression Pressure
(1) Remove
the glow plug
from.·
the
cylinder
whose
com-
pression pressure is to be
measured.
(2) Install
a
pressure
gauge
adapter
in
the
screw hole
of the glow plug and con-
nect a pressure gauge.
(3) Turn the engine over
wi th
the
starter
and
when
the
eng ine
speed
has
become
stabili zed,
record
the
engine
speed
and
pressure
gauge.
(4) Measure the compression pressure of other cylinders in the carne
manner.
CAUTION:
It is wrong to judge the status of the other cylinder by
measuring only one cylinder.
Be sure to measure both cylinders.
Judgement of Engine Condition by Compression Pressure
(1) When the engine is new, the compression pressure is a little high
because of the close fit between mating parts, but after that, the
pressure decreases gradually as the parts get worn.
(2) When the compression pressure has decreased below the acceptable
limits, the engine should be overhauled.
Judgement by Increased Consumption of Engine Oil
If the engine oil comsumption has increased by about 50% more than
the
standard
consumption
(as
100%),
the
engine
should
be
overhauled.
Cautions in Overhauling
Disassemble the engine taking the following
precautions.
The order
of disassembling and reassembling may be different depending on the
change of specifications.
(1) Carefully
check
for
visible
problems
prior
to disasembling
or
cleaning because some faults may not be found after disassembling
or cleaning.
(2) Drain all water, oil and fuel before disassembling.
83
Advertisement
