Engine Coolant; Engine Coolant Specifications; Coolant (Closed Cooling System) - Yanmar 4JH45 Operation Manual

12/05

ENGINE COOLANT

Engine Coolant Specifications

Note: In the U.S., LLC is required for
the warranty to be valid.
• Texaco Long Life Coolant (LLC), both
standard and premixed, product code
7997 and 7998
• Havoline Extended Life
Antifreeze/Coolant, product code 7994
Following the manufacturer's
recommendations, use a proper LLC
which will not have any adverse effects on
the materials (cast iron, aluminum, copper,
etc.) of the engine's cooling system.
Always use the mixing ratios specified by
the antifreeze manufacturer for the
temperature range.
JH Series Operation Manual
BEFORE YOU OPERATE

Coolant (Closed Cooling System)

Always add LLC to soft water especially
when operating in cold weather. Never use
hard water. Water should be clean and
free from sludge or particles. Without LLC,
cooling performance will decrease due to
scale and rust in the coolant system.
Water alone may freeze and form ice; it
expands approximately 9% in volume. Use
the proper amount of coolant concentrate
for the ambient temperature as specified
by the LLC manufacturer. LLC
concentration should be a minimum of
30% to a maximum of 60%. Too much LLC
will decrease the cooling efficiency.
Excessive use of antifreeze also lowers
the cooling efficiency of the engine. Never
mix different types or brands of LLC, as a
harmful sludge may form. Mixing different
brands of antifreeze may cause chemical
reactions, and may make the antifreeze
useless or cause engine problems.
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