Coolant - Holiday Navigator 2003 Owner's Manual

A fully formulated antifreeze or coolant containing
a precharge of Supplemental Coolant Additives (SCA)
is recommended to significantly simplify coolant
system maintenance. The difference between a fully
formatted antifreeze and a fully formatted coolant is
the percentage of water. Both contain balance amounts
of antifreeze, SCA, buffering compounds and a
percentage of good clean quality water. The antifreeze
of coolant must meet ethylene glycol or propylene
glycol recommendations. A good clean quality water in
a 50/50 ratio (40 to 60% working range) mixed with
fully formatted antifreeze will provide protection
from -34º F to 228º F. The 50/50 mix ratio must be
premixed prior to being put in the system. Placing
antifreeze and water in the cooling system is not
recommended. Consult the Cummins Operation &
Maintenance Manual for more details.
NOTE: An over concentration of antifreeze, or the use of
high silicate antifreeze, can cause damage to the coolant
system and engine. Antifreeze is essential in every climate.
WARNING: Do not continue engine operation when engine
temperature rises above 220º F. At 220º an engine warning
light will illuminate and the engine will begin to de-rate
in power output. Continued operation will result in
engine damage.
The coolant level and fluid freeze point should be checked with every oil
change interval, at 15,000 miles, 500 hours or six months, whichever comes
first. Also change the coolant filter at the same interval unless SCA concentration
is over three units. The coolant should be drained and flushed at 6,000 hours or
two years of service, whichever comes first.
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Chassis Information

COOLANT

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