MG MGB User Manual

THE
ENGINE
A
Remove
the timing
cover,
timing
chain,
and
gears
(see
Section
A.7).
Disconnect
the suction
advance
unit
pipe
from
the
distributor
and
take
out
the
two
bolts
with
flat
washers
securing
the
distributor
to
the
housing.
Do
not
slacken
the
clamping
plate
bolt
or
the ignition
timing
setting
will
be
lost.
Remove
the
distributor
assembly!Sections
A.25
and
A.26.
Remove
the
sump,
oil
pump,
and oil
pump
drive
shaft
(see
Section
A.1
1).
If
a
drive-type
tachometer
is
■tted,
disconnect
the
drive,
remove
the securing nuts
and
washers
and
withdraw
the
drive
gear.
Take
out
the
three
set
screws
and
shakeproof
washers
which
secure
the
camshaft locating
plate
to
the
cylinder
block
and
withdraw
the
camshaft.
Before
reassembly,
which
is
a
reversal
of
the
dismantling
procedure,
assemble
the
camshaft retaining
plate
and
the
chain
wheel
to
the
camshaft,
and
check
the
camshaft
end-■oat against
the
dimensions
given
in
the
‘GENERAL
DATA’ section
by
measuring
the
clearance
between
the
retaining
plate
and
the
thrust
face
of
the
camshaft
front
journal.
If the
end—■oat
is
excessive
the retaining
plate
should be
renewed.
Section
A
.17
RENEWING
THE
CAMSHAFT
BEARINGS
While
the
camshaft
is
removed
it
is
advisable
to
check
the
bearing
liners
for
damage
and
wear.
If
these
are
not
in
good
condition
they
must
be
removed
and
new
ones
■tted.
mo”,
/
I
,
"0/
l.
m,
WW
'
AD1388
Fig.
A.24
Checking
the
camshaft
end-■oat
MGB.
Issue5.
15676
alga-2
/'
W
lllllllllilllllll■lllllllll
“11111111111111
Fig.
A.25
Replacing
the
camshaft
centre
bearing
liner,
using
Service
tool
18G
124 A
with
adaptors
18G 124 H
and
18G
124
C
Wing
nut.
6.
Bearing
liner.
Body.
7. Large
‘C’
washer.
.
Adaptor
18G
124 H.
8.
Slotted
washer.
Centre
screw.
9.
Tommy-bar.
Adaptor
18G 124 C.
The
old bearings
can
be
punched
out.
The
new
ones
must
be
tapped
into
position.
These
bearings
are
easily
damaged
and
the
use
of
Service
tool
18G 124 A is
recommended.
V‘PWP’E‘
This
tool comprises
a
body
with
built-in
thrust
race,
screw
wing
nut,
stop
plate,
‘C’
washer
and
handle,
and
must
be
used
in
conjunction
with
the
following
adaptors:
18G 124
B,
18G 124
C,
18G 124
F,
18G 124 H.
Removing
the
front
and
rear
liners
Insert
the
small
end
of
the
adaptor
18G
124
F
into
the
camshaft
front
liner
from
the
inside
of
the
cylinder
block,
thread
the
body
of the
tool
onto
the
centre
screw,
and
pass
the
screw
through the
adaptor
from
the
front
of the
block.
Place
the
slotted
washer
on
the
■at
at
the
rear
of the
centre
screw
and
insert
the
tommy-bar into
the
centre
screw
behind the
slotted
washer.
Tighten
up
the
wing
nut to
withdraw
the
worn
liner.
The
rear
liner is
withdrawn
by
the
same
method,
using
the
adaptor
18G 124
B
and
withdrawing
the liner
from
the
rear
of
the
block.
Removing
the
centre
liner
Insert
the
stepped
pilot
adaptor
180 124
H
into
the
camshaft liner
front bore
from
the
inside
of the
block
and
the
adaptor
18G 124
C into
the
centre
liner
from
the
rear,
small
end ■rst.
With
the
body
of the
tool
positioned
on
the
centre
screw,
pass
the
screw
through
the
pilot
adaptor
and
the
adaptor in
the
centre
liner.
Place
the
slotted
washer
on
the
■at
at
the
rear
of
the
centre
screw
and
insert
the
tommy-bar
into
the
screw
behind
the
slotted
washer.
Tighten
up
the
wing nut to
withdraw
the liner.
Replacing
the
front
and
rear
liners
Place
the
new
liner
on
the
smallest
diameter
of the
adaptor
18G 124
F
and
insert
the
adaptor into
the
camshaft
front
A21

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English