Coolant; Radiator Hoses; Radiator And Cooling Fan - Triumph Thunderbird Service Manual

Cooling
Coolant
A year-round, Hybrid Organic Acid Technology (known as
Hybrid OAT or HOATI 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).
Always change the coolant at the intervals specified in the
scheduled maintenance chart.
The standard coolant mixture contains toxic chemicals
that are harmful to the human body. Never swallow neat
anti-freeze or any of the coolant mixture.
The anti-freeze incorporated in the coolant mixture
contains a corrosion inhibitor that helps prevent damage
to the cooling system and engine. Without this inhibitor,
the coolant would 'attack' the metals and the resulting
corrosion would cause blockages in the cooling system
leading to engine overheating and damage.
Always use the anti-freeze listed in the Specification
section and never use a methanol based anti-freeze as
this does not contain the required corrosion inhibition
properties.
Note:
• HD4X Hybrid OAT coolant, as supplied by
Triumph, is pre-mixed and does not need to be
diluted prior to filling or topping up the cooling
system.
Radiator Hoses
Regularly check all radiator hoses and hose clips for
cracks, leaks or deterioration.
Radiator and Cooling Fan
The motorcycle is fitted with a thermostatically controlled
electric fan situated behind the radiator. When the fan
operates with the motorcycle stationary or at slow speed,
cool air is drawn through the radiator from the front of the
motorcycle.
Check the radiator fins for obstruction by insects, mud,
leaves and general debris. Clean off any obstructions by
hand or with a stream of low-pressure water.
Using high-pressure water, such as from a pressure-
washer, can damage the radiator fins and impair the
radiator's efficiency.
Do not obstruct or deflect airflow through the radiator
by installing unauthorised accessories in front of the
radiator or behind the cooling fan. Interference with the
radiator airflow can lead to overheating and consequent
engine damage.
11.4 Service Manual - Thunderbird