Midget
Technical
Data

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Lubrication Points
Daily
1. Engine Inspect the oil level, and top up if necessary with oil
Every 3,000 Miles (5000 Km)
2. Steering Tie-Rod Ball Joints (2 nipples) Give three or four strokes of a gun filled with grease
3. Swivel Axles and Suspension
Lower Joints (6 nipples)
Give three or four strokes of a gun filled with grease
4. Propeller Shaft (2 nipples) Give three or four strokes of a gun filled with grease
5. Hand Brake Cable (1 nipple) Give three or four strokes of a gun filled with grease
6. Hand Brake Compensator Lever (1 nipple) Give three or four strokes of a gun filled with grease
7. Carburetters Top up damper assembly reservoirs with oil
8. Engine Drain off the old oil and refill with fresh oil
9. Gearbox Top up if necessary to the filler plug level with oil
10. Rear Axle Top up if necessary to the filler plug level with oil
11. Distributor Lubricate all parts if necessary
12. Oil Filter Wash the bowl in fuel and fit a new element
13. Dynamo Add a few drops of oil through the oil hole in the commutator end bearing
Every 12,000 Miles (20000 Km)
14. Steering-Rack Apply the grease gun filled with oil to the nipple on the
steering rack and give 10 strokes only
15. Water Pump Remove the plug and add grease; replace the plug
General Data
Engine
Engine type 10CG (4-cylinder overhead-valve)
Stroke 3.296 in (83.72 mm)
Cubic capacity 67 in³ (1098 cc)
Compression ratio 8.9 : 1 or 8.1 : 1
Firing order 1, 3, 4, 2
Valve rocker clearance (cold) 0.012 in (0.305 mm)
Oil pressure:
Normal (approx.) 30 - 60 lb/in² (2.1 - 4.2 kg/cm³)
Idling (approx.) 10 - 25 lb/in² (0.7 - 1.7 kg/cm³)
Ignition
Sparking plugs Champion N5 (14mm)
Sparking plug gap 0.024 - 0.026 in (0.625 - 0.660 mm)
Static ignition timing (H.C.) 5° B.T.D.C.
(L.C.) 3° to 5° B.T.D.C.
Contact breaker gap 0.014 - 0.016 in (0.35 - 0.40 mm)
Fuel System
Carburetters HS2
Carburetter needles Standard GY, Weak GG, Rich M
Spring Blue
Pump AC 'Y' type (mechanical)
Wheels and Tyres
Wheel size 3.5D x 13
Tyre size 5.20 - 13
Tyre pressures:
All conditions Gold Seal Gold Seal C41
Front 18 lb/in² (1.27 kg/cm²) 18 lb/in² (1.27 kg/cm²)
Rear 20 lb/in² (1.41 kg/cm²) 24 lb/in² (1.69 kg/cm²)
For sustained speeds in excess of 80 - 85mph (129 - 137kmph):
Front 24 lb/in² (1.69 kg/cm²) 22 lb/in² (1.55 kg/cm²)
Rear 26 lb/in² (1.83 kg/cm²) 28 lb/in² (1.97 kg/cm²)
Transmission
Rear axle ratio 4.22 : 1
Overall gear ratios: First 13.504 : 1
With synchromesh Second 8.085 : 1
Third 5.726 : 1
Fourth 4.22 : 1
Reverse 17.395 : 1
Dimensions Wire wheels Disc wheels
Track: Front 3 ft 10 15/16 in (1.17 m) 3 ft 10 15/16 in (1.17 m)
Track: Rear 3 ft 9 1/4 in (1.15 m) 3 ft 8 3/4 in (1.14 m)
Turning circle: Left lock 32 ft 1 1/2 in (9.79 m)
Right lock 31 ft 2 1/2 in (9.51 m)
Front wheel alignment Parallel to 1/8 in toe-in (0 to 3.2 mm)
Wheelbase 6 ft 8 in (2.03 m)
Overall length 11 ft 5 1/4 in (3.45 m)
Overall width 4 ft 5 in (1.35 m)
Overall height 4 ft 1 3/4 in (1.25 m)
Ground clearance 5 in (12.7 cm)
Weight
Dry weight 1,466 lb 665 kg
Capacities
Fuel tank 6 gallons (7.2 US gallons, 27.3 litres)
Engine sump (including filter) 6 1/2 pints (7.8 US pints, 3.7 litres)
Gearbox 2 1/4 pints (2.7 US pints, 1.3 litres)
Rear axle 1 1/2 pints (1.8 US pints, 0.85 litres)
Cooling system (without heater) 10 pints (12 US pints, 5.68 litres)
Heater 1/2 pint (0.6 US pints, 0.253 litres)
Engine Data
Valves
Head Diameter:
Inlet 1.307 - 1.312 in (33.198 - 33.21 mm)
Exhaust 1.1515 - 1.1565 in (29.243 - 29.373 mm)
Stem Diameter:
Inlet 0.2793 - 0.2798 in (7.094 - 7.107 mm)
Exhaust 0.2788 - 0.2793 in (7.081 - 7.094 mm)
Stem to guide clearance - inlet and exhaust 0.0015 - 0.0025 in (0.0381 - 0.0778 mm)
Valve to rocker clearance (cold) 0.012 in (0.03 mm)
Valve Springs
Free Length:
Inner spring 1.703 in (43.26 mm)
Outer spring 1.828 in (46.47 mm)
Valve lift - inlet and exhaust 0.318 in (8.076 mm)
Valve Guides
Length:
Inlet 1.6875 in (42.87 mm)
Exhaust 1.6875 in (42.87 mm)
Fitted height above seat:
Inlet 0.540 in (13.72 mm)
Exhaust 0.540 in (13.72 mm)
Valve Timing
Timing marks Dimples on timing gears
Rocker clearance: timing only 0.029 in (0.72 mm)
Inlet valve:
Opens BTDC
Closes 45° ABCD
Exhaust valve:
Opens 51° BBDC
Closes 21° ATDC
Lubrication
System Pressure:
Running 40 - 70 lbf/in² (2.81 - 4.92 kgf/cm²)
Idling 20 lbf/in² (1.4 kgf/cm²)
Oil pump Eccentric rotor; splined from camshaft
Oil filter Full-flow type, renewable element, differential
pressure switch; cars, disposable cartridge type
Oil pressure relief valve 50 lbf/in² (5.3 kgf/cm²)
Relief valve spring:
Free length 2.86 in (72.64 mm)
Torque Wrench Settings lbf ft kgf m
Cylinder head nuts:
948 cc 40 5.5
1098 and 1275 cc:
Plain studs 42 5.8
Studs stamped '22' or with drill point 50 6.9
Connecting rod nuts (1098 and 1275 cc):
Plain nuts 40 5.5
Nylon nuts 32 - 34 4.4 - 4.7
Connecting rod bolts (948 cc) 35 4.8
Crankshaft pulley bolt 70 9.6
Flywheel bolts 40 5.5
Main bearing bolts 60 8.7
Manifold nuts 15 2
Oil filter retaining nut 16 2.2
Oil pump retaining nuts/bolts (except 1098 cc) 12 1.6
Oil pump retaining nuts/bolts (1098 cc) 9 1.2
Oil pipe union adaptor (oil filter head) 19 - 21 2.6 - 2.9
Rocker cover retaining bolts 4 0.6
Rocker pedestal nuts 25 3.5
Sump retaining bolts 6 0.8
Tappet chest side covers (except deep presses type) 2 0.3
Tappet chest side covers (deep presses type) 5 0.7
Thermostat housing nuts 8 1.1
Timing cover 1/4 in bolts 6 0.8
Timing cover 5/16 in bolt 14 1.9
Water pump nuts 17 2.3
Distributor clamp:
Fixed nut type 4 0.6
Fixed bolt type 3 0.4
Fan securing bolt (1275 cc) 8 1.1
Exterior Paint Colours
Colour Paint Code Year Used
Old English White wt3 1967 - 68
Snowberry White wt4 1968 - 69
Glacier White blvc59 1970 - 77
Leyland White blvc206 1977 - 78
Porcelain White blvc243 1978 - 79
Black
Black bk1 1967 - 72
Black blvc23 1975 - 79
Red
Tartan Red rd9 1967 - 69
Blaze blvc16 1970 - 74
Flame Red blvc61 1970 - 72
Damask Red blvc99 1971 - 77
Flamenco blvc133 1975 - 77
Carmine blvc209 1977 - 79
Vermillion blvc118 1977 - 79
Pale Primrose yl12 1967 - 70
Bronze Yellow blvc15 1970 - 73
Harvest Gold blvc19 1971 - 76
Citron blvc73 1973 - 76
Chartreuse blvc167 1976 - 77
Inca Yellow blvc207 1977 - 79
Green
British Racing Green gn29 1967 - 70
Racing Green 70 blvc25 1970 - 72
Green Mallard blvc22 1971 - 73
Limeflower blvc20 1972 - 73
Tundra blvc94 1973 - 76
Brooklands Green blvc169 1976 - 79
Blue
Basilica bu11 1967 - 68
Mineral Blue bu9 1968 - 69
Blue Royale bu38 1969 - 70
Midnight Blue blvc12 1970 - 72
Teal Blue blvc18 1972 - 74
Aqua blvc60 1971 - 72
Tahiti blvc65 1975 - 77
Pageant Blue blvc224 1977 - 79
Brown
Bedouin blvc4 1970 - 72
Bracken blvc93 1973 - 76
Sandglow blvc63 1976 - 77
Russet Brown blvc205 1977 - 79
Purple
Black Tulip blvc23 1972 - 74
Mirage blvc11 1973 - 75
Aconite blvc95 1973 - 75

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