81
(XII) Malfunctioned Cooling System
Fault Characteristics & Causes
Elimination Approaches
1. Water temperature is too high.
a) Cooling water is insufficient.
b) Spring of radiator cap is soft.
c) Belt of water pump is loose or damaged.
d) Temperature saver malfunctioned.
e) Water pump works improperly.
f) Scale deposit in cooling water passage is
too much.
g) Radiator is clogged.
h) Water leaks from radiator.
i) Water leaks from water pump.
j) Connecting tube of radiator is loose or
broken.
a) Fill up cooling water into the tank.
b) Replace the spring.
c) Tighten or replace the belt.
d) Replace the temperature saver.
e) Repair or replace the water pump.
f) Clean the cooling water passage to get rid of the scale.
g) Clean the pipeline of radiator for clearing.
h) Repair or replace the radiator.
i) Replace the gasket or packing plate.
j) Tighten or replace the connecting tube.
2. Water temperature is too low.
a) Temperature saver malfunctioned.
b) Temperature saver is improper.
c) Ambient temperature is too low.
a) Replace the temperature saver.
b) Use as specified.
c) Set shelter from wind for protection.
