How To Drain And Flush The Cooling System - Detroit Diesel 60 Series Operator's Manual

NOAT Coolant. A properly main-
tained NOAT coolant may be oper-
ated 4 years, 600,000 miles
(960,000 km), or until overhaul,
whichever comes first. At this time,
the system must be completely
drained, thoroughly cleaned, and
refilled.
NOAT Coolants require the addi-
tion of an extender at 2 years,
300,000 miles, (480,000 km), or
5,000 hours, whichever comes
first. Use 1 pint of extender for
every 20 gallons of coolant.
Other properly
coolants may be operated up to 2
years, 250,000 miles, (400,000
km), or 4,000 operating hours,
whichever comes first. At that
time, the system must be com-
pletely drained,
cleaned, and refilled.
11. Do not use the following in Detroit
Diesel engine cooling systems:
Soluble oil
High silicate, automotive type
antifreeze
Chromate SCA's
Methoxy propanol-base coolant
Methyl alcohol-base coolant
Sealer additives or coolant con-
taining sealer additives
HVAC coolant
Phosphated coolants
H. How to Drain and Flush
the Cooling System
To avoid injury from the expulsion
of hot coolant, never remove the
cooling system pressure cap
while the engine is at operating
temperature. Remove the cap
slowly to relieve pressure. Wear
adequate protective clothing (face
shield or safety goggles, rubber
gloves, apron, and boots).
maintained
1. With the engine cool, drain the previ-
ous solution from the engine and
radiator. Dispose of the solution in
an environmentally responsible man-
ner according to state and/or federal
(EPA) recommendations.
thoroughly
2. Refill the cooling system with clean,
soft water and a good cooling sys-
tem cleaning compound, such as
those listed in Table 29 If the engine
is warm, fill slowly to prevent the
rapid cooling and distortion of the
metal castings.
3. Start the engine and operate it for fif-
teen minutes to circulate the solution
thoroughly.
4. Stop the engine and allow it to cool.
5. With the engine cool, drain the cool-
ing system completely.
6. Refill the cooling system with clean,
soft water and operate it for fifteen
minutes.
7. Stop the engine and allow it to cool.
60
CAUTION: