MG MGB User Manual

THE
ENGINE
IGG|23AC
IBGI23B
IBGIZBAB
ISGI23E
IBGIZSL
IBG
123A
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.
7
r
M121
AD
con:
II
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coo:
13A
AIOZSA
Fig. A.26
Showing
the
cutters
and pilots
positioned for
reaming the front
and
rear
liners.
Inset
are
the pilots
and
cutter
positioned for
reaming the
centre
liner
A. Position
No. 6
liner bore from
the
inside of the
block,
largest
diameter
first.
Line
up
the oil
holes
in
the
liner
and
the
cylinder
block
and
make
certain
that
they
remain correctly
positioned during
the whole
operation.
Thread the
body
of
the
tool
onto
the
centre
screw
and
pass
the
screw
through
the
adaptor
located
in
the front
liner
from the
front
of
the
block.
Position
the larger
of
the
two
‘C’
washers
on
the
centre
screw
with the
cut-away
portion
turned
away
from
the
butt.
joint
of
the
liner; this
joint
must
be
covered by the
washer.
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
the
wing
nut to
pull
the
liner
squarely
into
position.
The
rear
liner
is replaced
by the
same
method,
using
the
adaptor
18G
124
B and pulling
the
liner
into
position
from
the
rear
of the
block.
Replacing the
centre
liner
Insert
the
stepped
pilot adaptor
into
the
camshaft front
liner from the
inside of the
block.
Place
a new
centre
liner
on
the
small
end of
the
adaptor
18G
124 C and
position
the adaptor
in
the
centre
liner
bore
from
the
rear,
largest
diameter ■rst.
Ensure
that
the
oil
holes
in
the
liner and the
cylinder
block
are
lined
up
and
remain
so
during the
whole
operation.
With the body of
the tool
positioned
on
the
centre
screw
insert
the
screw
through
the
pilot
adaptor and
the
adaptor
in
the
centre
liner bore.
Position
the larger of
the
two
‘C’ washers
on
the
centre
screw
with the
cut-away
portion
turned
away
from
the
butt
joints
of
the liner; this
joint
must
be
covered by the
washer.
Place
the slotted washer
and the
tommy-bar
in
the
centre
screw
and tighten
up
the
wing
nut
to
pull the liner
into
position.
A.22
hi.
B. Position
No.
10
C. Position
No. 9
Reaming
the liners
Before
the
camshaft
can
be
reassembled
the
liners
must
be
reamed
in
line
in order
to
obtain the
correct
clearance
between
the
shaft
journals
and their
bearings.
For
this
purpose
use
tool
18G
123
A,
which
comprises
an
arbor
with
tommy-bar
and
Allen
key,
and
must
be
usedtwith
the
following
adaptors:
18G
123 B,
18G
123 E,
18G
123 F,
18G
123 L,
186
123 T, ISO
123 AB,
18G
123 AC,
ISO
123 AD.
Reaming
the
front
and
rear
liners
Insert
the
taper
pilots
18G
123 AB
and 18G
123 AC
into
the
centre
and
rear
liners
respectively.
Place
the
plain
pilot
18G
123 L
on
the
arbor,
followed
by
the
cutter
18G
123 E.
Pass
the
arbor
through
the
front
liner
and
the
pilot
located
in
the
centre
liner.
Place
the
cutter
ISO
123 B
on
the
arbor
and push
the
arbor
through
the
taper
on
the
rear
liner.
Secure
the
cutters
and
pilots
in
their
respective
positions
(see
illustration),
ensuring that the
cutter
locating
pins
are
engaged
in
the
correct
numbered
hole
provided
in
the
arbor.
The
cutter
for
the front
liner
will
cut
■rst
with
the
arbor
piloting
in
the
centre
and
rear
liners.
Clear
away
the
swarf
frequently
during
the
operation.
The
cutter
for
the
rear
liner
will follow
with the
arbor
piloting
in
the
front
and
centre
liners.
Clear
away
all the
swarf
before
the
plain
pilot
is
allowed
to
enter
the front
liner.
When
the
cut
in
the
rear
liner
is
■nished
free
the
cutters
and withdraw
the
arbor.
Reaming the
centre
liner
Set
up
for
the
second
part
of the
operation
by
inserting the
pilots
18G
123 T and
18G
123 AD
in
the front
and
rear
liners.
Pass
the
arbor
through
the
pilot
in
the
front
liner
and place
the
cutter
for
the
centre
liner
on
the
arbor. Push
the
arbor
MGB.
Issue
5.
15676

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English