Cooling System; Draining; Flushing - Triumph Spitfire MK3 Handbook

COOLING SYSTEM

The pressurised "no loss" cooling system incorporates a
translucent plastic overflow reservoir (Fig. 45) which collects excess
coolant from the radiator as the coolant in the system expands with
heat. Depression created as the system cools, causes the coolant to
flow back from the reservoir into the radiator. The fluid level which
is visible through the translucent reservoir should be maintained at
least half full when cold.

Draining

To drain the system, move the heater control (16) Figs. 2 and 3,
to the hot position, remove the radiator filler cap Fig. 43, open the
tap in the bottom of the radiator (Fig. 42) and the tap at the rear
right-hand side of the cylinder block (Fig. 44).
Note. See "Caution", page 47.

Flushing

Efficient cooling is maintained by thoroughly flushing the
system once each year before adding anti-freeze. When carrying this
out, it is advantageous to remove the drain tap completely and to use
plenty of clean running water.
Allowing anti-freeze solution to remain in the system through-
out the summer period affords anti-corrosion protection. The
solution, however, should be changed at the beginning of each
winter period as the inhibitor becomes exhausted.
COOLING SYSTEM
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