MG MGB User Manual

GENERAL
DATA—continued
(18G/18GA~co,ntinued)
Valve guides
Length: Inlet
..
Exhaust
. ..
Outside diameter:
Inlet
and
exhaust
Inside diameter: Inlet and exhaust
Fitted height above head: Inlet and exhaust
..
Interference
fit
in
head: Inlet and exhaust
(Later
cars)
Length: Inlet
.. .. .. ..
Fitting height above head: Inlet
..
Valve
springs
Free length: Inner
..
Outer
Fitted
length:
Inner
..
Outer
..
Load
at
fitted length:
Inner
Outer
Load
at top
of lift:
Inner
..
Outer
Valve crash speed
Valve
timing
Timing marks
.. ..
Rocker clearance: Running
Timing
Inlet
valve: Opens
Closes
Exhaust
valve:
Opens
Closes
ENGINE LUBRICATION
System
..
.. ..
System
pressure:
Running
..
Idling
Oil
pump
Capacity
Oil filter
..
..
By-pass
valve
opens
Oil
pressure
relief
valve
.. ..
Relief
valve
spring:
Free length
Fitted length
.. ..
Load
at
■tted length
FUEL SYSTEM
Carburetters
Choke diameter
Jet
size
Needles
Piston
spring
Air cleaners
Fuel
pump
Type
(Early cars)
..
Minimum
■ow
MGB. lssue6. 69615
livin.
(41.275
mm.).
2
g
in.
(55.95 mm.).
.5635
to
.5640
in.
(14.30
to
14.32
mm.).
.3442
to
.3447
in.
(8.73
to
8.74
mm.).
%in.
(15.875
mm.).
.0005
to
.00175
in.
(.012
to
.044
mm.).
1%‘in.
(47.63 mm.).
3%:
in.
(19 mm.).
1%
in.
(50.0
mm.).
2
&
in.
(54.4 mm.).
1%
in.
(36.5 mm.).
11%
in.
(39.7 mm.).
28
to
321b.
(12.7
to
14.5
kg.).
72 lb.
(32.7
kg.).
48
to
52
lb.
(21.7
to
23.6
kg.).
117
lb.
(53 kg.).
6,200
rpm.
Dimples
on
camshaft
and
crankshaft
wheels.
.015
in.
(.38 mm.)
cold.
.055
in.
(1.4 mm.).
16°B.T.D.C.
56°A.B.D.C.
51°B.B.D.C.
21‘°A.T.D.C.
Wet
sump, pressure
fed.
’1
Between
50
and
801b./sq.
in.
(3.51
and 5.6
kg./cm.2).
Between 10 and 25
lb./sq.
in.
(.7
and
1.7
kg./crn.2).
Hobourn-Eaton
0r
eccentric rotor.
7“.
3%
gal./min.
at
2,000
rpm.
Tecalemit full-■ow felt
element.
13
to
17
lb./sq.
in.
(.9
to
1.1
kg./cm.2).
70
lb./sq.
in.
(4.9 kg./cm.2).
3 in.
(76.2 mm.).
2
%
in.
(54.7 mm.).
15.5
to
16.5 lb.
(7.0
to
7.4
kg.).
Twin S.U.
type
HS4.
11A
in.
(38.1 mm.).
.090
in.
(2.2 mm.).
No.
5
(Standard),
No. 6
(Rich),
N
o.
21
(Weak).
Red.
Copper
paper
element.
S.U. electric
HP.
7
gal/hr. (31.8
litres/ha,
8.4
US.
gal./hr.).
GeneralData 3'

MG MGB Specifications

General

Brand	MG
Model	MGB
Category	Automobile
Language	English