Fuel, Oil and Coolant Specifications
DETROIT DIESEL
COOLANT INHIBITOR CHART
Inhibitor
Compatability
Corrosion
Complete
Ethylene
*Methoxy
Inhibitor or
Inhibitor
Inhibitor
Glycol
Propanol
Base
Base
Inhibitor System
Type
System
Water
Antifreeze
Antifreeze
Sodium chromate
Chromate
No
Yes
No
No
Potassium dichromate
Chromate
No
Yes
No
No
Perry filter elements:
5020 (type OS)
Chromate
Yes
Yes
No
No
S-453 (Spin-on)
Chromate
Yes
Yes
No
No
5030 (type OS)
@Non-chromate
Yes
Yes
Yes
No
S-331 (Spin-on)
@Non-chromate
Yes
Yes
Yes
No
5070 (type OS)
#Non-chromate
Yes
Yes
Yes
No
S-473 (Spin-on)
# Non-chromate
Yes
Yes
Yes
No
Lenroc filter element
Non-chromate
Yes
Yes
Yes
No
Fleetguard filter elements:
DCA (canister)
Non-chromate
Yes
Yes
Yes
No
DCA (Spin-on)
Non-chromate
Yes
Yes
Yes
No
AC filter elements:
DCA (canister)
Non-chromate
Yes
Yes
Yes
No
DCA (Spin-on)
Non-chromate
Yes
Yes
Yes
No
Luber-Finer
filter
elements:
LW-4739 (canister)
Non-chromate
Yes
Yes
Yes
No
LFW-4744 (spin-on)
non-chromate
Yes
Yes
Yes
No
Nalcool 2000 (liquid)
Non-chromate
Yes
Yes
Yes
No
Perry LP-20 (liquid)
Non-chromate
Yes
Yes
Yes
No
Lubercool (liquid)
Nonchromate
Yes
Yes
Yes
No
Dowtherm cooling sys-
tem conditioner
Non-chromate
Yes
Yes
Yes
Yes
*Dowtherm 209, or equivalent.
(@Perry "Year Around" formula.
# Perry "Universal" formula.
Figure 2
chemical
compounds
which
provide
corrosion
Coolant Filter Elements
protection, pH control and water softening ability.
Corrosion protection has been discussed earlier under
Replaceable elements are available with various
the section on Corrosion Inhibitors. The pH control is
chemical inhibitor systems. Care should be used in the
used to maintain an acid free solution. The water
selection of elements relative to inhibitor compatibility
softening ability deters formation of mineral deposits.
with coolant solutions shown in Figure 2.
Inhibitor systems are available in various forms such as
coolant filter elements, liquid and dry bulk inhibitor
Problems have developed from the use of the
additives and as an integral part of permanent
magnesium lower support plate used by some
antifreeze.
manufacturers in their coolant filters. The magnesium
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