General Data - MG MGB TOURER GHN5 Handbook

GENERAL DATA
No. of cylinders
.
Capacity
. .
Compression ratio
:
High compression :
18V* (all types)
18GG, 18GD*
.
Low compression :
18V (earlv cars).
The vehicle specification may vary according to market requirements and from
model to model. The manufacturers reserve the right to alter specifications with
or without notice at any time. The policy of constant product improvement by
the manufacturers may involve major or minor changes to the vehicle specifica-
tion. Whilst every effort is made to ensure accuracy of the particulars contained
in this Handbook, no liability for inaccuracies or the consequences thereof can be
accepted by the manufacturer or the Dealer or Distributor who supplied the
Handbook.
During running-in from new certain adjustments vary from the specification
figures detailed. They will be set to specification by your Dealer or Distributor
at the After Sales Free Service and should thereafter be maintained throughout
the car's life.
Engine Type
. . . . . . . .
. .
18V 779F and 18V 780F*
Early cars
. . . . . . . .
18V 581F, 18V 582F and 18V 583F*
18V 581Y, 18V 582Y, and 18V 583Y*
18GG and 18GD*
. . . .
Bore
. . . . . .
3.16 in. (80.26 mm.)
Stroke
. .
. . . .
. .
3.5 in. (89 mm.)
. . . .
4
. .
. .
1798
C.C.
(109.8 cu. in.)
, ,
1 .
Firing order
:
. . .
.
. . .
1 , 3 , 4 , 2
Valve clearance (hot)
. .
.
.
0.015 in. (.038 mm.)
(cold)
. .
.
.
0.015 mm. (0.33 mm.)
Oil pressure: Idling
. .
. .
. .
10 to 25 lb./sq. in. (0.7 to 1.7 kg./~rn.~)
Normal
. .
. .
50 to 80 lb./sq. in. (3.5 to 5.6 kg./cma)
Idling setting:
18V 779F, 18V 780F*
. . . .
850 r,p.m.
18V* (early cars)
. . . . . .
750 to 800 r.p.m.
. . . .
18GG, 18GD*
.
.
500 r.p.m.
Fast idle setting:
18V779Fand18V780F*
. .
1,100to1,200r.p.m.
18V (early cars), 18GG, 18GD*.
.
1,100 r.p.m.
Ignition Static ignition timing:
High compression:
18V779F, 18V780F*
. . . .
6"B.T.D.C.
18V (early cars), 18GG, 18GD*
10" B.T.D.C.
Low compression :
18V* (early cars)
.
.
.
.
10" B.T.D.C.
1 8 G G , 1 8 G D * . .
..
.
.
8" B.T.D.C.
Stroboscopic timing (with vacuum disconnected):
High compression:
18V 779F, 18V 780F*
.
.
.
.
11" B.T.D.C. at 1,000 r.p.m.
18V* (early cars)
. .
. .
13" B.T.D.C. at 600 r.p.m.
..
18GG,18GD*..
. .
14" B.T.D.C. at 600 r.p.m.
Low compression :
18V* (early cars)
. . .
.
13" B.T.D.C. at 600 r.p.m.
. . . . . .
18GG, 18GD*
12" B.T.D.C. at 600 r.p.m.
Contact breaker gap
. .
. .
0.014 to 0.016 in. (0.36 to 0.41 mm.)
Sparking plugs
. .
. .
. .
Champion N-9Y
. . . .
Plug gap
. .
. .
0025 in. (0.64 mm.)
*
Denotes engine number prefix.
79