MAINTENANCE
Item 4 – Cooling System
The cooling system must be full for
proper operation of the engine.
HOT COOLANT
To avoid scalding from the
expulsion of hot coolant, never
remove the cooling system
pressure cap while the engine is
at operating temperature. Wear
adequate protective clothing
(face shield, rubber gloves,
apron, and boots). Remove the
cap slowly to relieve pressure.
Check the coolant level daily and
maintain it near the bottom of the
filler neck on the radiator. On some
installations this is done by checking
an overflow bottle or sight glass. Add
coolant as required, but do not overfill.
Before adding coolant, refer to How to
Select Coolant in this guide.
Coolant Level —
Make a daily
visual check for cooling system leaks.
Look for an accumulation of coolant
when the engine is running and when
it is stopped. Coolant leaks may be
more apparent on a engine when it is
cold.
Coolant Inhibitors —
The
inhibitors in antifreeze solutions must
be replenished with a non-chromate
corrosion inhibitor supplement when
indicated by testing the coolant.
Refer to How to Select Coolant in this
guide for required test intervals and
inhibitor levels.
NOTICE:
Coolant must be inhibited with the
recommended SCA's (supplemental
coolant additives) listed in this
guide. In addition, the engine
can be equipped with a coolant
filter/inhibitor system as an
installed option or as an after-sale
item. Failure to check and
maintain SCA levels at required
concentrations will result in
severe damage (corrosion) to
the engine cooling system and
related components.
Coolant Drain Interval —
Detroit Diesel recommends
replacing coolant at the intervals
listed in Table 17.
66
All information subject to change without notice. (Rev. 01/04)
6SE484
0401
Copyright © 2004 DETROIT DIESEL CORPORATION
