Dodge RAM TRUCK 1500 1995 Service Manual page 287

COOLING SYSTEM DIAGNOSIS 7 -17
COOLING SYSTEM DIAGNOSIS—DIESEL ENGINE—CONTINUED
Condition Possible Causes
Correction
STEAM IS COMING FROM
FRONT OF VEHICLE NEAR
GRILL AREA WHEN
WEATHER IS WET, ENGINE
IS WARMED UP AND
RUNNING, AND VEHICLE IS
STATIONARY.
TEMPERATURE GAUGE IS
IN NORMAL RANGE
1. During wet weather, moisture
(snow, ice or rain condensation)
on the radiator will evaporate
when the thermostat opens.
This opening allows heated
water into the radiator. When
the moisture contacts the hot
radiator, steam may be emitted.
This usually occurs in cold
weather with no fan or airflow
to blow it away.
1. Occasional steam emitting from this
area is normal. No repair is necessar
COOLANT COLOR 1. Coolant color is not necessarily
an indication of adequate
corrosion or temperature
protection. Do not rely on
coolant color for determining
condition of coolant.
1. Refer to Coolant in this group for
antifreeze tests. Adjust antifreeze-to-
water ratio as necessary.
COOLANT LEVEL CHANGES
IN COOLANT RESERVE/
OVERFLOW TANK.
TEMPERATURE GAUGE
IS IN NORMAL RANGE
1. Level changes are to be
expected as coolant volume
fluctuates with engine
temperature. If the level in the
tank was between the FULL
and ADD marks at normal
engine operating temperature,
the level should return to
within that range after operation
at elevated temperatures.
1. A normal condition. No repair is
necessary.
J9507-55