SM01-002-0
Page 3
DESC R IPT IO N
against corrosion. If antifreeze is used, follow the
The cooling system consists of the radiator, engine
antifreeze manufacturers requirements for proper
cooling circuit, and the connecting hoses. Its
protection in regards to cooling system capacity,
capacity v aries according to the engine being used.
and only ethylene glycol base permanent antifreeze
The temperature is controlled by a 180 degree F (82
should be used. Engines equipped with cooling
degrees C) thermostat located between the top of
system filters should not use antifreeze with anti-
the engine and the top of the radiator. The radiator,
leak additiv es because the additiv es will clog the
in addition to cooling the engine, also contains a
filter.
cooler which cools the automatic transmission oil.
At all times, the coolant should be properly inhibited
M A IN T EN AN C E
T R O U B L ESH O O T IN G .
SYMPTOM
PROBABLE CAUSE
SOLUTION
Coolant Loss.
1. Engine overheating.
a. Leaks at any of the following:
a. Check, locate, and repair leaks.
gaskets, hose connections, water
Replace hoses, clamps, and other parts
pump, radiator, heater, core plugs,
as required.
drain cock or plugs, cracked head or
block.
NOTE
Internal leakage is indicated by the
presence of coolant in the engine
crankcase, or oil in the radiator.
Check for cracked cylinder head
or block, or a blown head gasket.
Boiling.
a. Drain and flush cooling system.
a. Radiator or other parts of cooling
system clogged with rust or scale.
b. Clear obstructions.
b. Grille or bug screen clogged.
c.
Straighten fins.
c.
Radiator core fins damaged.
d. Replace thermostat.
d. Thermostat damaged - stuck
closed.
e. Repair or replace water pump.
e. Water pump leaking air into
system.
f.
Replace radiator hoses.
f. Radiator hose collapsed or rot-
ting inwardly.
