SM01-002-0
Page 4
SYMPTOM
PROBABLE CAUSE
SOLUTION
1. Engine overheating (continued)
g. Radiator pressure cap damaged.
g. Replace cap.
h. Cylinder head loose, causing
h. Check and tighten.
exhaust gas leakage into cooling
system.
i. Water pump impeller corroded or
i.
Repair or replace water pump.
loose on shaft.
j. Antifreeze protection inadequate,
j. Check and add antifreeze as
causing partial freeze-up.
required.
After Boil
a. Improper installation of thermo-
a. Check and correct.
stat.
b. Damaged thermostat.
b. Replace thermostat.
c. High temperature thermostat
c. Use thermostat of proper oper-
used with alcohol-type antifreeze.
ating range; use ethylene-glycol type
antifreeze.
d. Excessive sediment in cooling
d. Drain and flush cooling system.
system.
Foaming.
a. Drain and flush cooling system.
a. Excessive sediment in cooling
system.
b. Check, locate, and repair.
b. Air or exhaust leak into cooling
system.
Radiator Air Flow Obstructed.
a. Leaves, dirt and foreign material.
a. Clean away obstruction.
b. Bent fan blades.
b. Straighten blades or replace fan.
c. Improper valve timing or sticking
c. Check and
repair
or
retime
valves.
engine.
d. Clogged muffler or pipe.
d. Check and correct.
e. Check brakes and repair as
e. Dragging brakes.
required.
f.
Check and add oil as required.
f.
Low engine oil level.
