down, the screw tip may adjust according to
temperature and pressure changes. The torque
may need to be adjusted for individual applica-
tions.
7. Fill the radiator with coolant.
For Mercedes-Benz OM 366LA engines, maintain
a minimum of 50 percent by volume of a
corrosion-inhibiting antifreeze. Do not use more
than 55 percent by volume of corrosion-inhibiting
antifreeze, and do not add any other substances
to the coolant.
For all other engines, use a mixture of 50 per-
cent water and 50 percent corrosion-inhibiting
antifreeze to protect the engine to –34°F (–37°C)
year round.
See Table 1 and Table 2 for engine cooling sys-
tem capacities.
See Table 3 for approved antifreezes.
Coolant Capacities (all but FL112)
Engine Make and
Model
Radiator Core
and System Capacity
*
2Row
quarts (liters)
3Row
quarts (liters)
Caterpillar CFE
Series
28 (26.5) —
Cummins B Series 30.5 (28.9) 31.0 (29.3)
Cummins C Series
and M11
31.2 (29.5) —
Detroit Diesel
Series 50
31.4 (29.7) —
Dodge Magnum V-8 28 (26.5) —
Dodge Magnum V-10 36 (34) —
Mercedes-Benz
OM 366LA
29.5 (27.9) 30.0 (28.4)
*
System capacity includes all hoses, fittings, and the heater core.
Table 1, Coolant Capacities (all but FL112)
Coolant Capacities (FL112 only)
Engine Make and
Model
Radiator Core
and System Capacity
*
1000 Sq. In.
quarts (liters)
1200 Sq. In.
quarts (liters)
Caterpillar C10
Series
30.8 (29.1) 33.7 (31.9)
Caterpillar C12
Series
30.8 (29.1) 33.7 (31.9)
Cummins M11 30.0 (28.4) 32.9 (31.1)
Detroit Diesel
Series 55
35.1 (33.2) 38.0 (36.0)
*
System capacity includes all hoses, fittings, and the heater core.
Table 2, Coolant Capacities (FL112 only)
Approved Coolants
Engine Type
Coolant
Manufacturer
Coolant
Designation
*
Diesel Texaco JC04 Antifreeze
Van Waters and
Rogers Ltd.
(Canada)
Diesel Antifreeze
No. 6038
Gasoline
†
Chrysler Mopar
*
Freightliner-approved antifreeze must meet one of the following condi-
tions: A. Ethylene glycol solution that meets GM 6038–M Engineering Stan-
dards. B. Ethylene glycol solution that has less than 0.1% anhydrous so-
dium metasilicate, and meets either GM 1825–M or GM 1899–M
Engineering Standards.
†
Because Dodge Magnum Engines use aluminum parts, the coolant used
with these engines must contain Alugard 340-2
™
.
Table 3, Approved Coolants
NOTE: You can mix purple-pink coolant (pre-
charged with a borate/nitrate-based additive)
with the common green coolant, although some
color change will be apparent.
Engine Cooling/Radiator 20
Business Class Trucks Maintenance Manual, August 2003 20/3
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