SECTION
DB
THE
COOLING
SYSTEM
General Description.
Section No. DD.I Draining and filling
the
cooling system.
Section No.
00.2
To remove
the
radiator.
Section No.
00.3
The
water
pump-to
dismantle and reassemble.
DO
GENERAL
DESC"RIPTION
The cooling system of
the
M.G. Midget (Series
.. TF
")
is seaJed, and
the
water
circulation is assisted
by a pump attached
to
the
front
of
the
cylinder block
and driven by a
belt
from
the
crankshaft. The
water
circulates from
the
base of
the
radiator and passes
around
the
cylinders and cylinder head, reaching
the
header
tank
of
the
radiator via
the
thermostat
and
top
water
hose. From
the
header
tank
It passes down
the
core
to
the
base
tank
of
the
radiator. Air is drawn
through
the
radiator by a fan attached
to
the
water
pump pulley.
Seetion
DB.l
DRAINING
AND
FILLING
THE
COOLING
SYSTEM
The
cooling system is
under
appreciable pressure
While
the
engine is
hot
after
a run and
the
radiator
filler cap must
be removed '1ery carefully
or
left in
posltlcn until
the
water
has cooled.
If it is necessary
to
remove
the
filler cap while
the
engine is hot, it is absolutely essential
to
remove it
Fig.DD.r.
The filler Q.p showing the retaining cam on the spout
rim and
the
safety lobes.
M.G.
Midget.
luue
I (H & E)
81966-1
'54
gradually, and
the
filler
spout
is provlded with a
specially shaped cam
to
allow this to be done easily.
Unscrew
the
cap slowly until
the
retaining tongues
are
felt
to
engage
the
small lobes on
the
end of
the
filler spout cam and walt until
the
pressure in
the
radiator
Is fully released before finally ramovlng
the
cap.
Drain and refill
the
system as detailed In Section
D.I.
Seetion
OD.2
TO
REMOVE
THE RADIATOR
Take off
the
bonnet
by undoing
the
rear hinge
bracket and withdrawing
the
bonnet
rearwards from
the
front
hinge.
Detach
the
forward ends of
the
radiator stays.
Remove
the
bolt at each side bracket securing
the
radiator
to
the
valances at
the
top.
Remove
the
two
set
bolts screwing into captive nuts
in
the
radiator
grille at each side, accessible below
the
Wings.
Disconnect
the
by-pass hose at
the
thermostat,
the
hose on
the
elbow at
the
pump,
the
lower
hose at
the
radiator and
the
main hose at
the
top
of
the
thermo-
stat.
Unscrew and remove
the
nuts below
the
radiator
securing it
to
the
front
cross-member.
The
shell and radiator block will then come away
together.
Section
DD.3
THE WATER
PUMP-TO
DISMANTLE
AND
REASSEMBLE
The
water
pump used In
the
Series"
TF"
Is
the
same as
that
fitted
to
the
later
types of
the"
TO
..
and is illustrated in Fig. D.6:
Instructions for its removal, dismantling and
reassembly will be found in Section
0.4.
Disconnect
the
tie-bar between
the
valances.
DD.\
Wishvilles Classic
Automobile Library
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