OPERATOR'S MANUAL

Cooling System Preventive Maintenance
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PB1318 3/01 Model 330
• Replace the filters
• Refill with premixed coolant. Consult the Medium Duty
Maintenance Manual for the correct filters to install.
Additives
If you add supplemental coolant additives to the radiator,
maintain them at the recommended levels. Read the label
carefully. Too much additive could harm your vehicle.
Approved additives help neutralize the water's harmful
effects on your vehicle's cooling system. Ask your dealer to
recommend the best ones for you.
• Do not add rust inhibitors, radiator sealants, or water
pump lubricants containing soluble oil to the coolant.
These additives can cause the anti-corrosion chemicals
not to work.
• If the cooling system in your truck has a treated spin-on
water filter, install the service filter on all “B” or “E” sched-
uled service intervals. See Table 3, “Maintenance
Schedule,” Page 124. For more detailed recommenda-
tions, check with your Peterbilt Dealer, an Authorized
Service Center, or check the manufacturer's
Engine
Operation and Maintenance Manual
.
• Antifreeze solutions containing anti-leak additives will
quickly restrict the water filter. If this happens, the filter
will not work. So stay away from anti-leak additives.
CAUTION: Do not add inhibitor if the engine has
a Dry Charge Additive (DCA4) water filter car-
tridge containing corrosion inhibitor—engine
damage from overconcentration of silicates may
occur.
• The water filter cartridge containing DCA4 inhibitor must
be periodically changed. Refer to the
Engine Operation
and Maintenance Manual
for details.
CAUTION: Do not mix inhibitor types. Improper
mixing of coolant may damage the engine.
• For coolant conditioner recharge intervals see the
Engine Operation and Maintenance Manual or the
Medium Duty Maintenance Manual.
Change and Refilling
The coolant must be changed periodically. When draining
coolant, capture old coolant and dispose of it properly.