HOW-TO SECTION
Coolant
Interval
1
Action
A.
20,000 Miles (32,000 km)
or 3 Months*
B.
500 Hours or 3 Months*
Test nitrite concentration
with test strip. Add
SCA or dilute coolant as
needed.
Antifreeze / Water +
SCA Inhibitor
(DDC
Power Cool
)
A.
300,000 Miles
(480,000 km)
B.
2 Years or 4,000 Hours*
Drain and clean system.
Replace with new
coolant.
A.
20,000 Miles (32,000 km)
or 3 Months*
B.
500 Hours or 3 Months*
Test nitrite concentration
with test strip. Add
SCA or dilute coolant as
needed.
Ethylene Glycol
/ Water + SCA
Inhibitor
or
Propylene Glycol
/ Water + SCA
Inhibitor
A.
300,000 Miles
(480,000 km)
B.
2 Years or 4,000 Hours*
Drain and clean system.
Replace with new
coolant.
A.
300,000 Miles
(480,000 km) or 2 Years*
B.
5,000 Hours
Add
Power Cool
Plus
Extender
Ethylene Glycol /
Water + OAT Inhibitor
or
Propylene Glycol /
Water + OAT Inhibitor
A.
600,000 Miles
(960,000 km)
B.
4 Years or 10,000 Hours*
Drain and clean system.
Replace with new
coolant.
A.
20,000 Miles (32,000 km)
or 3 Months*
B.
500 Hours or 3 Months*
Test nitrite concentration
with test strip. Add
SCA or dilute coolant as
needed.
Water Only + SCA
Inhibitor
A.
300,000 Miles
(480,000 km)
B.
2 Years or 4,000 Hours
Drain and clean system.
Replace with new
coolant.
A.
300,000 Miles
(480,000 km) or 2 Years*
B.
5,000 Hours
Add
Power Cool
Plus
Extender
Water Only + OAT
Coolant
A.
600,000 Miles
(960,000 km)
B.
4 Years or 10,000 Hours
Clean and drain.
Replace with new
coolant.
1
Maintenance interval based on application. Drain interval dependent
on proper maintenance.
A.
On-Highway Trucks and Motor Coaches, City Transit Coaches,
Pick-Up and Delivery, Short Trip and Emergency Vehicles
B.
Industrial, Generator Set and Other Applications
Table 26 Coolant Maintenance Intervals
106
All information subject to change without notice.
(Rev. 01/ 04)
6SE550 0401
Copyright © 2004 DETROIT DIESEL CORPORATION