Triumph TR8 - Page 56

COOLING SYSTEM
Header Tank (1. Fig 1)
The pressurlsed cooling system Incorporates a header lank
which provides a single pOint for coolant fltllng and level
checking The coolant level should be maintained 35 mm
(1 5 Inch) below the neck of the header tank
Pressure Cap (2, Fig 1)
A
pressure cap on the header tan\{ permits a budd up 01
pressure WIthin the system as engine temperature Increases
enabling the system to operate at temperatures higher than
the normal bOIling polnl of coolant under atmospheriC
pressure
II
IS elllremety dangerous 10 remove the pressure cap when
the engine IS hot as the coolant will boll Immediately when
pressure 1$ released
WARNING: If it is necessary to remove the pressure cap
when the engine is hot, exercise great care by protecting
the hands against escaping steam. Slowly turn the
pressure cap anti·clockwise until resistance of the safety
stop is felt. Leave the cap in this position until all
pressure is released. Press the cap downwards against
the spring to clear the safety stops, and continue turning
until it can be lifted off.
Draining (Fig 1)
When the engme IS cold. remove the pressure cap (2) and
open the cylinder block drain taps (3)
COOLING SYSTEM
Slacken the bottom hose clip and disconnect the hose from
the radiator
Filling
Refit the bottom hose. ensunng that all hoses are m good
condition and the hose connections are tight.
Close
both cylmder block dram taps (3)
Set
the mterlOr heater controls to the maximum heat
poSItion
Remove
the pressure cap (2) from the header lank (1) and fill
the system until the coolant level IS 35 mm (1 5 Inch) below
the neck of the header tank
Slacken
the hose clip (4) on the automatic choke body of the
nght hand carburettor (5)
Start the engme and re-lighten the hose clip as soon as waler
Issues from this connection
Rl:ln the engine at approxImately 1500 rev/min until the
temperature rises sufftclently to open the thermostat
(approximately 2 minutes)
Stop the engine Top up the coolant level in the header tank
to the- base of the filler neck and relit the pressure cap
When filling petrol injection vehicles ignore the reference to
the automatic choke.
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