Cooling System; Coolant Level Inspection - Triumph Bonneville Bobber 2018 Owner's Handbook Manual

Cooling System

To ensure efficient engine cooling, check
the coolant level each day before riding
the motorcycle, and top up the coolant
if the level is low.
Note:
• A year round, Hybrid Organic Acid
Technology (known as Hybrid OAT or
HOAT) coolant is installed in the
cooling system when the motorcycle
leaves the factory. It is coloured
green, contains a 50% solution of
ethylene glycol based antifreeze,
and has a freezing point of -35°C
(-31°F).
Corrosion Inhibitors
Warning
HD4X Hybrid OAT coolant contains
corrosion inhibitors
suitable for aluminium engines and
radiators. Always use the coolant in
accordance with the instructions of
the manufacturer.
Coolant that contains anti-freeze and
corrosion inhibitors
chemicals that are harmful to the
human body. Never swallow antifreeze
or any of the motorcycle coolant.
and antifreeze
contains toxic
Note:
• HD4X Hybrid
supplied by Triumph, is premixed
and does not need to be diluted
prior to filling or topping up the
cooling system.
To protect the cooling system from
corrosion, the use of corrosion inhibitor
chemicals in the coolant is essential.
If coolant containing
inhibitor is not used, the cooling system
will accumulate rust and scale in the
water jacket and radiator. This will block
the coolant passages, and considerably
reduce the efficiency of the cooling
system.

Coolant Level Inspection

Note:
• The coolant level should be checked
when the engine is cold (at room or
ambient temperature).
1
2
cjwi
1. Maximum mark
2. Minimum mark
Maintenance
OAT coolant,
a corrosion
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