PREVENTIVE MAINTENANCE ENGINE COOLING SYSTEM
Regional Haul
(R05/10) Y53-6033 – 179 –
10. Operate the engine at high idle for another 10 minutes
and add coolant to raise the level back up to the base
of the fill neck.
11. Replace the surge tank pressure cap.
Check the coolant level after each trip when the
engine has cooled. Add coolant as necessary. You
may find your coolant level is not up to the correct
level soon after you have filled the radiator. This may
be because all the trapped air in the system has not
yet been purged. It takes a little time for all the air to
leave the system after you fill your radiator.
Engine (Block) Heater (option)
WARNING! Do not use the heater if there are
any signs of problems. Engine block heaters
can cause fires resulting in death, serious
personal injury and/or property damage if not
properly maintained and operated. Regularly
inspect the engine block heater wiring and
connector for damaged or frayed wires. Con-
tact your Authorized Service Center or the
manufacturer of the heater if you are in need
of repairs or information.
CAUTION: Always unplug the block heater
before starting your engine. Damage to the
cooling system could occur if not turned OFF
(unplugged).
Use a solution of half ethylene glycol antifreeze and half
water for best heater performance. Do not use more than
65 percent concentration of antifreeze, as a shortened
heater life will result.
After servicing the cooling system, operate the vehicle for
a day or two before using the heater. Trapped air inside
the engine needs time to escape.
PREVENTIVE MAINTENANCE (PM) INTERVALS
IABCDE
At the first
15,000
mi./
24,000 km
or at the
first PM
15,000
mi./
24,000
km/
Monthly
30,000
mi./
48,000 km
60,000
mi./
96,000
km/
6 months
120,000
mi./
192,000k
m / Annu-
ally
240,000
mi./
384,000
km
