MG MGB User Manual

GENERAL
DATA
(GHN4/GHD4 CARS,
18GD
ENGINE—GHNS/GH‘DS
CARS,
18GG
ENGINE)
The
following
information is
applicable
to
the
GHN4
and GHD4 series
cars
■tted with
18GB engines and
Gl-lNS/GHDS
cars
fitted
with 18GG engines
and
should be used in conjunction
with the preceding
speci■cations.
‘
ENGINE
Type
Pistons
Type
..
..
.. .. ..
Clearance
of skirt
in
cylinder: Top
..
Bottom
Number
of
rings
.. .. ..
..
Width
of
ring
grooves:
Compression
Oil control
..
Piston rings
Type: Compression:
Top
..
Second
..
Oil control
Fitted
gap:
Compression
Oil control
..
Width: Compression
Oil control
..
Thickness:
Compression:
Top
Second
Gudgeon
pin
Type
..
Diameter
Fit
in:
Piston
..
Small end
..
Connecting
rods
Type
..
.. .. ..
Length
between
centres
Locking
method big-end
COOLING SYSTEM
Fan belt: Width
Length
Thickness
..
Tension
Thermostat:
Normal
Hot
climates
Cold
climates
FUEL SYSTEM
Carburetter
needles
..
MGB. Issue
3. 80619
18GD—18GG.
Aluminium
solid
skirt,
three
rings.
.0021
to
.0033
in.
(.053
to
.084
mm.).
.006
to
.0012 in.
(.015
to
.030
mm.).
Three;
2 compression.
1
oil
control.
.064
to-
.065
in.
(1.625
to
1.651
mm.).
.1578
to
.1588
in.
(4.01
to
4.033
mm.).
Plain,
sintered alloy.
Tapered, sintered alloy—marked
‘TOP’.
Two
chrome-faced
rings
with expander, Apex.
.012
to
.022
in.
(.305
to
.600
mm.).
'
.015
to
.045
in.
(.38
to
1.14
mm.).
.0615
to
.0625
in.
(1.56
to
1.59
mm.).
.152
to
.158
in.
(3.86
to
4.01
mm.).
.124
to
.127
in.
(3.14
to
3.22
mm.).
.104
to
.111 in.
(2.64
to
2.81
mm.).
Press
■t
in
connecting
rod.
.8125
to
.8127
in.
(20.63
to
20.64
mm.).
Hand push
fit
at
16°C.
(60°F.).
12
lb. ft.(1.7 kg.
m.)
minimum using
ISO
1150 and
adaptor
type
C.
Horizontal split
big-end,
solid
small-end.
6.5
in.
(165.1 mm.).
Multi-sided
nut.
km.
(11.9 mm.).
35%
in.
(90.2 cm.)
at
gin.
width equivalent.
■in.
(10.7
mm.).
1A
in.
(12.8 mm.)
movement at
midway
of longest
run.
82°
c.
(180° F.).
74°
0.
(165° F.).
88°
C.
(190°
F.).
FX
(Standard),
No. 6
(Rich),
GZ
(Weak).
General
Data 13
1

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English