• The coolant level (C) is for factory installed
radiator with the four cylinder turbocharged
aftercooled engine.
Note:
The coolant level (B) for the four cylinder
turbocharged engine is different form three cylinder
and the four cylinder turbocharged aftercooled
engines. The four cylinder turbocharged engine
coolant level (B) is 20 mm (0.78740 inch) below the
top of the radiator neck.
Radiator Cap
Illustration 49
g06165279
Typical example
Clean the cooling system filler cap and check the
condition of the filler cap gasket (1). Replace the
cooling system filler cap if the filler cap gasket (2) or
the sealing surface (1) are damaged.
The radiator filler cap should be check at regular
intervals to insure that the filler cap relieve pressure
is correct. The cooling system fill cap pressure is:
• Cooling system filler cap pressure for three
cylinder engine 95 kPa (13.7 psi)
• Cooling system filler cap pressure for four cylinder
engine 110 kPa (15.9 psi)
Reinstall the cooling system filler cap when all
checks are complete.
i06296588
Coolant
Temperature
Regulator
-
Replace
Replace
the
water
temperature
regulator
before
the
water
temperature
regulator
fails.
This
is
a
recommended
preventive
maintenance
practice.
Replacing
the
water
temperature
regulator
reduces
the
chances
for
unscheduled
downtime.
A
water
temperature
regulator
that
fails
in
a
partially
opened
position
can
cause
overheating
or
overcooling
of
the
engine.
A
water
temperature
regulator
that
fails
in
the
closed
position
can
cause
excessive
overheating.
Excessive
overheating
could
result
in
cracking
of
the
cylinder
head
or
piston
seizure
problems.
A
water
temperature
regulator
that
fails
in
the
open
position
will
cause
the
engine
operating
temperature
to
be
too
low
during
partial
load
operation.
Low
engine
operating
temperatures
during
partial
loads
could
cause
an
excessive
carbon
buildup
inside
the
cylinders.
This
excessive
carbon
buildup
could
result
in
an
accelerated
wear
of
the
piston
rings
and
wear
of
the
cylinder
liner.
NOTICE
Failure to replace your water temperature regulator
on a regularly scheduled basis could cause severe
engine damage.
Perkins engines incorporate a shunt design cooling
system and require operating the engine with a water
temperature regulator installed.
If the water temperature regulator is installed incor-
rectly, the engine may overheat, causing cylinder
head damage. Ensure that the new water tempera-
ture regulator is installed in the original position. En-
sure that the water temperature regulator vent hole is
open.
Do not use liquid gasket material on the gasket or cyl-
inder head surface.
Refer to the Disassembly and Assembly Manual,
“Water Temperature Regulator - Remove and Install”
for the replacement procedure of the water
temperature regulator, or consult your Perkins dealer
or your Perkins distributor.
Note:
If only the water temperature regulators are
replaced, drain the coolant from the cooling system
to a level that is below the water temperature
regulator housing.
86
SEBU9075-03
