Dodge RAM TRUCK 1500 1995 Service Manual page 58

0 - 22 LUBRICATION AND MAINTENANCE
Fig. 4
Remove
Oil Filter—Typical
Fig. 5 Install Oil Filter—Typical
used e n g i n e OIL d i s p o s a l
Care should be exercised when disposing used en­
gine oil after it has been drained from a vehicle en­
gine. •
ENGINE COOLING SYSTEM
WARNINGS AND PRECAUTIONS
WARNING: ANTIFREEZE IS AN ETHYLENE GLYCOL
B A S E COOLANT AND I S HARMFUL IF S W A L ­
L O W E D OR INHALED. IF S W A L L O W E D , DRINK
TWO G L A S S E S O F WATER AND INDUCE VOMIT­
ING. IF INHALED, MOVE TO F R E S H AIR A R E A .
S E E K MEDICAL ATTENTION IMMEDIATELY. DO NOT
S T O R E IN O P E N OR UNMARKED CONTAINERS.
W A S H SKIN AND CLOTHING THOROUGHLY A F T E R
COMING IN CONTACT WITH ETHYLENE GLYCOL.
K E E P OUT O F R E A C H O F CHILDREN.
D I S P O S E O F GLYCOL B A S E COOLANT P R O P ­
ERLY, CONTACT YOUR D E A L E R OR GOVERNMENT
A G E N C Y FOR LOCATION O F COLLECTION C E N T E R
IN YOUR A R E A .
DO NOT O P E N A COOLING S Y S T E M W H E N T H E
ENGINE IS AT RUNNING T E M P E R A T U R E , P E R ­
SONAL I N J U R Y CAN RESULT.
AVOID RADIATOR COOLING FAN W H E N ENGINE
COMPARTMENT RELATED S E R V I C E IS P E R ­
FORMED, P E R S O N A L INJURY CAN R E S U L T
BR
CAUTION: Do not use straight antifreeze as engine
coolant, inadequate engine running temperatures
can result.
Do not operate vehicle without proper concentra­
tion of recommended ethylene glycol coolant, high
running temperatures and cooling system corrosion
can result.
The engine cooling system will develop internal
pressure of 97 to 123 kPa (14 to 18 psi) at normal op­
erating temperature. Allow the vehicle approximately
one half hour to cool off before opening the cooling
system. As an indicator of pressure, squeeze the up­
per radiator hose between index finger and thumb. If
it collapses with little effort the system would have
low internal pressure and should be safe to open to
the first safety notch of the radiator cap. Refer to
Group 7, Cooling System.
COOLING SYSTEM INSPECTION
Coolant level should be inspected when other en­
gine compartment service is performed or when cool­
ant leak is suspected. Coolant recovery tank level
should read between the ADD and FULL marks, lo­
cated on the side of recovery tank, when the engine
is at normal operating temperature. Normal coolant
level maintenance does not require the removal of ra­
diator cap.
• Cooling system freeze protection should be tested
at the onset of the winter season or every 12 months.
Service is required if coolant is low, contaminated,
rusty or freeze protection is inadequate. To properly
test cooling system, see Group 7, Cooling System.
The cooling system factory fill is a mixture of 50%
Ethylene Glycol based antifreeze and 50% water. Us­
ing a suitable hydrometer, measure antifreeze con­
centration in the radiator when the engine is cool. If
the cooling system has recently been serviced, allow
coolant to circulate for at least 20 minutes before
taking hydrometer reading. Properly mixed coolant
will protect the cooling system to -37°C (-35°F). If the
freeze protection is above -28°C (-20°F), drain enough
coolant from the cooling system to allow room to add
antifreeze to achieve adequate protection. A mix table
on the coolant container indicates the amount of an­
tifreeze required to winterize the cooling system
based on the capacity, see Capacity Chart in General
Information section of this group.
ANTIFREEZE SPECIFICATION
Chrysler Corporation recommends Mopar Anti­
freeze/Coolant or a high quality, ethylene glycol base
antifreeze/coolant, with a silicate inhibitor.
RADIATOR CAP
The radiator cap must be secure to provide proper
pressure