143
NOTE:
If proper quality antifreeze is used, there is no need
to add extra inhibitors or additives that claim to
improve system. They may be harmful to proper
operation of system, and are unnecessary expense.
Cooling System Service
Cooling system should be serviced as follows:
1) Check cooling system for leaks or damage.
2) Wash radiator cap and filler neck with clean water by
removing radiator cap when engine is cold.
3) Check coolant for proper level and freeze protection.
4) Using a pressure tester, check system and radiator
cap for proper pressure holding capacity 0.9 kg/cm2
(12.8 psi, 90 kPa). If replacement of cap is required, use
proper cap specified for this vehicle.
5) Tighten hose clamps and inspect all hoses. replace
hoses whenever cracked, swollen or otherwise deterio-
rated.
6) Clean frontal area of radiator core.
NOTE:
After installing radiator cap to radiator, make sure
that its ear is aligned with reservoir tank hose as
shown in figure. If not, turn cap more to align its ear
with hose.
Installation of radiator cap
Cooling System, Flush and Refill
1) Remove radiator cap when engine is cool:
WARNING
!
To help avoid danger of being burned, do not
remove radiator cap while engine and radiator
are still hot. Scalding fluid and steam can be
blown out under pressure if cap is taken off too
soon.
2) With radiator cap removed, run engine until upper
radiator hose is hot (this shows that the thermostat is
open and coolant is flowing through system).
3) Stop engine and open radiator drain plug to drain cool-
ant.
Radiator Drain Plug
4) Close drain plug. Add water until system is filled and
run engine until upper radiator hose is hot again.
5) Repeat steps 3) and 4) several times until drained liq-
uid is nearly colorless.
6) Drain system and the close radiator drain plug tightly.
7) Disconnect hose from water reservoir tank. Remove
tank and pour out any fluid. Scrub and clean inside of
tank with soap and water. Flush it well with clean water
and drain. Reinstall tank and hose.
8) Add proper mixture coolant (refer to page ) of good
quality ethylene glycol anti–freeze and water to radiator
and tank. Fill radiator to the base of radiator filler neck
and reservoir tank to “FULL” level mark. Reinstall reser-
voir tank cap.
9) Loosen air bleeding bolt “A” on engine side and after
making sure that coolant has come out through the air
bleeding hole of bolt “A”, tighten bolt “A”. (Radiator
should be always kept full of coolant).
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