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ENGINE COOLANTS
(for engines with wet sleeve cylinder liners)
Preferred Coolants
The following pre-mix engine coolants are preferred:
• Northern Lights COOL-GARD™II
• Northern Lights COOL-GARD II PG
COOL-GARD II pre-mix coolant is available in several
concentrations with different freeze protection limits as
shown in the following table.
Cool-Gard II pre-mix
Cool-Gard II 20/80
Cool-Gard II 30/70
Cool-Gard II 50/50
Cool-Gard II 55/45
Cool-Gard II PG 60/40
Cool-Gard II 60/40
Not all COOL-GARD II pre-mix products are available in
all countries.
Use COOL-GARD II PG when a non-toxic coolant
formulation is required.
Additional Recommended Coolants
The following engine coolant is also recommended:
• Northern Lights COOL-GARD II Concentrate in a
40-60% mixture of concentrate with quality water.
IMPORTANT: When mixing coolant concentrate with
water, do not use less than 40% or greater than 60%
concentration of coolant. Less than 40% gives inadequate
additives for corrosion protection. Greater than 60% can
result in coolant gelation and cooling system problems.
Coolant
Freeze protection limit
-9
C (16
F)
o
o
-16
C (3
F)
o
o
-37
C (-34
F)
o
o
-45
C (-49
F)
o
o
-49
C (-56
F)
o
o
-52
C (-62
F)
o
o
OM-C3 11/21
Other Coolants
Other ethylene glycol or propylene glycol base coolants
may be used if they meet the following specification:
• Pre-mix coolant meeting ASTM D6210 requirements
• Coolant concentrate meeting ASTM D6210
requirements in a 40-60% mixture of concentrate with
quality water
WATER QUALITY FOR MIXING WITH
COOLANT CONCENTRATE
Engine coolants are a combination of three chemical
components: ethylene glycol (EG) or propylene glycol
(PG) antifreeze, inhibiting coolant additives, and quality
water.
Water quality is important to the performance of the
cooling system. Distilled, deionized, or demineralized
water is recommended for mixing with ethylene glycol
and propylene glycol base engine coolant concentrate.
All water used in the cooling system should meet the
following minimum specifications for quality:
Chlorides
Sulfates
Total solids
Total dissolved I hardness <170 mg/L
pH
IMPORTANT: Do not use bottled drinking water because
it often contains higher concentrations of total dissolved
solids.
IMPORTANT: Do not use water from reverse osmosis
water makers.
25
<40 mg/L
<100 mg/L
<340 mg/L
5.5 - 9.0
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