Fuel, Oil and Coolant Specifications
DETROIT DIESEL
Inhibitor Compatability
Corrosion
Complete
Ethylene *Methoxy
Inhibitor or
Inhibitor
Inhibitor
Glycol
Propanol
Inhibitor System
System
Base
Base
Type
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
@Non-chromate
Yes
Yes
Yes
No
5030 (type OS)
S-331 (Spin-on)
@Non-chromate
Yes
Yes
No
Yes
5070 (type OS)
#Non-chromate
Yes
Yes
No
Yes
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
No
Yes
AC filter elements:
DCA (canister)
Non-chromate
Yes
Yes
No
Yes
DCA (Spin-on)
Non-chromate
Yes
Yes
No
Yes
Luber-Finer filter elements:
LW-4739 (canister)
Non-chromate
Yes
Yes
No
Yes
LFW-4744 (spin-on)
Non-chromate
Yes
Yes
No
Yes
Nalcool 2000 (liquid)
Non-chromate
Yes
Yes
No
Yes
Perry LP-20 (liquid)
Non-chromate
Yes
Yes
Yes
No
Lubercool (liquid)
Non-chromate
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.
Fig. 3 - Coolant Inhibitor Chart
use in Detroit Diesel engines. These systems can be used
Bulk Inhibitor Additives
with either water or permanent antifreeze solutions
and provide corrosion protection, pH control and
Commercially packaged inhibitor systems are availa-
water softening. Some non-chromate inhibitor systems
ble which can be added directly to the engine coolant
offer the additional advantage of a simple on-site test
or to bulk storage tanks containing coolant solution.
to determine protection level and, since they are added
Both chromate and non-chromate systems are
directly to the coolant, require no additional hardware
available and care should be taken regarding inhibitor
or plumbing.
compatibility with other coolant constituents.
All inhibitors become depleted through normal
Non-chromate inhibitor systems are recommended for
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