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Section E
Contents
Description
Routine maintenance
Anti freeze
Operation 1 Draining the cooling system
Operation 2 Radiator removal and replacement
Operation 3 Water pump renewal and replacement
Operation 4 Fan belt adjustment
Operation 5 Fan belt removal and replacement
Operation 6 Thermostat removal and replacement
Testing the thermostat
Temperature gauge and sender unit
Description
The engine is water cooled, assisted by a four bladed fan. The system
is of the positive circulation type, incorporating a centrifugal water
pump driven by a "V" belt from the crankshaft pulley. The fan is
mounted on a pulley pressed on to the front of the water pump
spindle. To pressurise the system and raise the boiling point of the
coolant, the radiator filler cap has a spring loaded valve set to open at
0.49 kg/cm²(7.0 lb/in²
A wax type thermostat in conjunction with a by-pass hose assists rapid
warming up and maintains a constant operating temperature.
The water temperature is indicated by a meter, housed in the left-
hand gauge of the fascia. This is measured electrically by a
temperature sensitive sender unit screwed in to the thermostat
housing.
Routine maintenance
The coolant level should be regularly checked and topped up if
necessary. Check the cooling system periodically for leaks and ensure
the fan belt is correctly adjusted.
Anti-freeze mixture
In the winter months an anti-freeze must be added to the coolant in
the radiator to prevent damage to the cylinder block or radiator
caused by freezing.
Before refilling, the cooling system should be flushed out thoroughly.
Check the condition of all hoses and connections in the cooling and
heater systems.
It is advisable to pre-mix the anti-freeze with water in a separate
container before refilling the cooling system.
The percentage of anti-freeze solution in the cooling system will
determine the degree of protection and it is advisable to allow a
margin of safety in cases where lower temperatures than normal may
be encountered.
The quantities of anti-freeze for various degrees of protection are
given in a table at the end of this section.
Cooling system
Figure 1 Cylinder block drain plug
1. Drain plug
Figure 2 Radiator drain plug (if fitted)
1. Drain plug
The percentage of anti-freeze in the cooling system can be checked by
measuring the specific gravity of the coolant using a suitable
hydrometer.
It is permissible with modern anti-freeze formulation to leave the anti-
freeze solution in the cooling system throughout the year, provided
that the protection afforded at the onset of Winter has not been
reduced by routine topping up of the coolant water during the
summer months.
Note: During summer months, if no anti-freeze is used a solution of
water plus 3.35 fluid oz of Reliant Coolant Inhibitor "R" part number
10374 MUST
be used to maintain the system free of corrosion.
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