GENERAL UPKEEP-Lubrication
COOLING SYSTEM
Filling
(see page 11).
Draining
For the purpose of draining, taps are provided in the radiator bottom tank
and at the rear of the cylinder block on the right-hand side. As the
cooling system is pressurised it will be necessary, when draining, to
remove the radiator cap.
If a heater is fitted, ensure that the cock is open before draining.
Anti-Freeze Mixtures
We recommend owners to use Smith's
"
Rluecol
"
or Shell
"
Snowflake
"
anti-freeze (inhibited Glycol base compound) in order to protect the
cooling system during frosty weather and reduce corrosion to a minimum.
The cooling system is fitted with a thermostat and there is a risk of the
radiator block freezing while the engine is running during the warming up
period when the thermostat is shut, even though the car has been left in a
warm garage and water is not frozen at the start of the run.
We recommend that you provide for the cooling system ample protection
against a sudden fall in temperature down to
Or
F. during frosty weather
by using
3
pints of anti-freeze.
In countries where sub-zero temperatures prevail, consult your
Doretti
Agent in respect of the quantity of anti-freeze required.
Caution
Before adding the anti-freeze preparation, make sure that the water hose
clips are securely fitted and the cylinder head nuts are tight. If the
solution is able to escape through a leaking gasket into the cylinders it may
be burnt into a tacky substance capable of doing harm to the engine.
However, this could only happen in the rare event of a faulty gasket.
LUBRICATION
This is one of the most important subjects in connection with the upkeep of a
car, and careful attention to the following instructions will be amply repaid by
the results obtained.
For the recommended periods of lubrication, see the lubrication chart
folded inside the rear cover of this book. The correct lubricants to be
used are given on pages
51
and
52.
Draining
To drain the engine, gearbox or rear axle, remove the plug provided
beneath each unit. This process is assisted by opening the filler to allow
ingress of air, and by draining when the oil is warm after a run of at least
10
miles (16 km.). Under these conditions, impurities in the oil will be
well mixed and will flow away with the oil during the draining process.
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