Remove radiator cap slowly and only
when engine is cool (120°F) or
painful burns could result.
Do not add cold coolant to a hot
engine or engine may be damaged.
Allow engine to cool to below 120 °F
before adding coolant.
Check coolant level in radiator. Coolant should
be 1 in. from bottom of filler neck (fig. 46).
Inspect the cooling system hoses and hose
connections for leaks or deterioration. Particles of
deteriorated hose can be carried through the cooling
system and slow or partially stop circulation.
Inspect water pump for drive pulley wobble, and
grease or water leakage around the water pump shaft.
Never pull or pry on the fan. This
can damage the fan blade and cause
fan failure, resulting in damage to
equipment and serious injury to
Inspect the cooling fan for cracks, loose rivets,
and bent or loose blades. Check the fan to ensure that
it is securely mounted. Check the fan hub for wobble
and grease leakage.
Inspect fan belts for cracks or frays. Belts that
have a glazed or shiny surface indicate belt slippage.
Belts correctly installed and tensioned will show even
pulley and belt wear.
Inspect thermostat housing and water manifold
for leaks or loose connections.
Figure 46. Radiator service.