PART 8: MAINTENANCE AND SERVICE
PB1319 (CAT. NO. 5296 ) —141— 22-01691 (R02/02)
Engine Cooling System
What to Add to Your Cooling System
Water
Water must be clean & free of corrosive and scale-forming chemicals.
Your drinking water may not be good for your vehicle. Approved addi-
tives help neutralize water’s harmful effects on your cooling system.
Ask your dealer to recommend the best ones for you.
If the cooling system in your truck has a treated spin-on water filter,
install the service filter on all B checks. See the Preventive Mainte-
nance Schedule in this manual. For more detailed recommendations
check with the service department at your dealership or check the
engine manufacturer’s operation and maintenance manual.
If, in an emergency, the radiator was filled with water known to contain
gypsum, sulfur, or chlorine:
1. Drain the cooling system as soon as possible.
2. Flush the system.
3. Replace the filters.
4. Refill with premixed coolant. Consult your maintenance manual
for the correct filters to install.
Low Silicate Antifreeze
Always install a low silicate antifreeze. Premix your coolant to main-
tain the correct proportion of antifreeze and coolant conditioner
chemicals. Install only enough low silicate antifreeze to provide the
required protection against freezing.
The chart on the next page shows the temperature protection pro-
vided by low silicate ethylene glycol antifreeze in relation to the pro-
portion mixed with water.
WARNING! Removing the radiator cap on a hot engine
can cause scalding coolant to spray out and burn you
badly. If the engine has been in operation within the
previous 30 minutes, be very careful in removing the
radiator cap.
Protect face, hands, and arms against escap-
ing fluid and steam by covering the cap with a large, thick
rag.
If you see any steam or coolant escaping, don’t try
to remove it until the radiator cools down. If you see
nothing escaping, still remove the cap very slowly and
carefully. Be ready to back off if any steam or coolant
begins to escape.
WARNING! Handle coolant and antifreeze carefully. Ethyl-
ene glycol antifreeze is poisonous. Store in original fluid
container only, and always keep out of reach of children.
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