Engine Coolant; Engine Coolant Specifications; Coolant (Closed Cooling System); Checking And Adding Coolant - Yanmar 8LV320 Operation Manual

ENGINE COOLANT

Engine Coolant Specifications

• Texaco Long Life Coolant (LLC), both standard
and premixed, product code 7997 and 7998
• Havoline Extended Life Antifreeze/Coolant,
product code 7994
Note: In the U.S., LLC is required for the warranty
to be valid.
NOTICE
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.

Coolant (Closed Cooling System)

NOTICE
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.
8LV Series Operation Manual
BEFORE YOU OPERATE

Checking and Adding Coolant

NOTICE
The 8LV series engine has filter port on the coolant
tank.
1. Ensure all drain cocks are closed.
Note: The drain cocks are opened before
shipping from the factory.
2. Loosen the filler cap (1, Figure 6) of the coolant
tank to relieve the pressure, then remove the
filler cap.
Never remove the coolant filler cap if the
engine is hot. Steam and hot engine coolant
will spray out and seriously burn you. Allow
the engine to cool down before you attempt
to remove the cap.
3. Pour coolant slowly into the coolant tank
(2, Figure 6) to avoid air bubbles. Fill until
coolant overflows from the filler port.
Never pour cold coolant into a hot engine.
DANGER
2
037415-00X00
Figure 6
NOTICE
1
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