1987-Montero · Intro maint a · страница 54 из 58 · Открыть оригинал PDF ↗
COOLING SYSTEM (Check and service as t-e-
NOOSBEA
quired)
Check the cooling system parts, such as radiator, heater, and
oil cooler hoses, thermostat and connections for leakage and
damage.
CHECKING THERMOSTAT
Remove the thermostat, (Refer to GROUP 7 COOLING-Ther-
mostat.)
Проверка
l Replace the thermostat if there is even the slightest
opening of the valve at room temperature.
l Replace if the exterior of the thermostat is noticeably
deformed, or if it is damaged or broken.
l Clean away any corrosion or sediment adhered to the
valve.
WJ6616
-.
l Fill a container with water, and immerse the thermostat in
it; increase the water temperature and check whether or
not the thermostat’s initial opening temperature and fully
opened temperature [valve lift amount when fully opened:
8 mm (.31 in.) or more] are the specified values.
Standard value : Initial valve-opening temperature:
88” + 1.5% (190” 2 3°F)
Fully opened valve temperature:
100°C (212°F) or higher
NOTE
The lift amount is calculated by first measuring the valve
height when fully closed, and then measuring the height at
the fully open temperature.
ANTIF:REEZE
The engine cooling system is provided with a mixture of 50%
ethylene glycol anti-freeze and 50% water at the time of
manufacture.
Since the cylinder head and water pump body are made of
aluminum alloy casting, be sure to use a 30 to 60% ethylene
glycol antifreeze coolant to provide corrosion protection and
freezing prevention.
Caution
If the concentration of the antifreeze is below 30%, the
anticorrosion property will be adversely affected. in addi-
tion, if the concentration is above 60%, both the antifreez-
ing and engine cooling properties will decrease, adversely
affecting the engine. For these reasons, be sure to maintain
the concentration level within the specified range.
MEASUREMENT OF ANTIFREEZE CONCENTRATION
Run the engine until coolant is fully mixed. Drain some coolant
(antifreeze), and measure temperature and specific gravity of
the coolant. Determine concentration and safe working tem-
perature. If the coolant is short of antifreeze, add antifreeze up
to a concentration of 50%.
LSTB Revision
Оригинальная страница руководства
