MG 1930-1959
   
Midget J1 and J2 (1932-34)
Engine
Bore & Stroke 57mm x 83mm
Displacement 847cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 60 lb./sq. in.


Fuel Supply
Carburetor Twin SU 1" semi-D/D
Standard D8
Richer No. 1
Weaker M6


Valving
Intake tappet clearance 0.006" (hot)
Exhaust tappet clearance 0.008" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015" - 0.018"
Plug gap 0.018"
Ignition timing indication -
Ignition timing TDC


Clutch
Clutch type Single Dry Plate
Clutch linings Special


Brakes
Brake type Shoe and cam, cable-operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2½°
Caster angle 6°
King pin angle 6½°


Midget Series QA (Supercharged) (1934-35)
Engine
Bore & Stroke 57mm x 73mm
Displacement 746cc
Firing order 1,3,4,2
Oil pressure (hot) 60 - 80 lb./sq. in.


Fuel Supply
Carburetor Vertical 17⁄8
Standard RM2 with Zoller Q4 Supercharger


Valving
Intake tappet clearance 0.008" (hot)
Exhaust tappet clearance 0.014" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015"
Plug gap 0.018"
Ignition timing indication -
Ignition timing TDC


Clutch
Clutch type Single Dry Plate
Clutch linings Special


Brakes
Brake type Shoe and cam, cable-operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 3°
Caster angle 8°
King pin angle 7° 30'

Midget Series PA (1934-36)
Engine
Bore & Stroke 57mm x 83mm
Displacement 847cc
Firing order 1,3,4,2
Oil pressure (hot) 60 - 80 lb./sq. in.


Fuel Supply
Carburetor SU Twin semi-D/D
Standard M6
Richer M5
Weaker S


Valving
Intake tappet clearance 0.006" (hot)
Exhaust tappet clearance 0.008" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015" - 0.018"
Plug gap 0.015" - 0.018"
Ignition timing indication Flywheel
Ignition timing 20° BTDC


Clutch
Clutch type Single Dry Plate
Clutch linings Special


Brakes
Brake type Shoe and cam, cable-operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2° 30'
Caster angle 8° 30'
King pin angle 6° 30'

Midget Series PB (1936)
Engine
Bore & Stroke 60mm x 83mm
Displacement 939cc
Firing order 1,3,4,2
Oil pressure (hot) 60 - 80 lb./sq. in.


Fuel Supply
Carburetor SU Twin semi-D/D
Standard M6
Richer M5
Weaker S


Valving
Intake tappet clearance 0.006" (hot)
Exhaust tappet clearance 0.008" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015" - 0.018"
Plug gap 0.015" - 0.018"
Ignition timing indication Flywheel
Ignition timing 20° BTDC


Clutch
Clutch type Single Dry Plate
Clutch linings Special


Brakes
Brake type Shoe and cam, cable-operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2° 30'
Caster angle 8° 30'
King pin angle 6° 30'

Midget Series TA (1936-39)
Engine
Bore & Stroke 63.5mm x 102mm
Displacement 1292cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 80 lb./sq. in.


Fuel Supply
Carburetor Twin SU semi-D/D
Standard AC
Richer MI
Weaker S


Valving
Intake tappet clearance 0.010" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.015" - 0.018"
Ignition timing indication Pulley and timing chain case
Ignition timing TDC


Clutch
Clutch type Single Plate Oil
Clutch linings Cork Inserts


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 3°
Caster angle 6°
King pin angle 7° 30'

Midget Series TB (1939)
Engine
Bore & Stroke 66.5mm x 90mm
Displacement 1250cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 70 lb./sq. in.


Fuel Supply
Carburetor Twin SU semi-D/D
Standard ES
Richer EM
Weaker AP


Valving
Intake tappet clearance 0.019" (hot)
Exhaust tappet clearance 0.019" (hot)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.018"
Ignition timing indication Pulley and timing chain case
Ignition timing TDC


Clutch
Clutch type Single Dry Plate
Clutch linings Fabric


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 3°
Caster angle 6°
King pin angle 7° 30'

Midget Series TC (1945-49)
Engine
Bore & Stroke 66.5mm x 90mm
Displacement 1250cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 70 lb./sq. in.


Fuel Supply
Carburetor Twin SU semi-D/D
Standard ES
Richer EM
Weaker AP


Valving
Intake tappet clearance 0.019" (hot)
Exhaust tappet clearance 0.019" (hot)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.020" - 0.022"
Ignition timing indication Pulley and timing chain case
Ignition timing TDC


Clutch
Clutch type Single Dry Plate
Clutch linings Fabric


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR


Wheel Alignment
Toe-In ¼"
Camber 3°
Caster angle 6°
King pin angle 7° 30'

Midget Series TD (1950-53)
Engine
Bore & Stroke 66.5mm x 90mm
Displacement 1250cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 70 lb./sq. in.


Fuel Supply
Carburetor Twin SU 1¼" semi-D/D
Standard ES
Richer EM
Weaker AP


Valving
Intake tappet clearance 0.019" (hot)
Exhaust tappet clearance 0.019" (hot)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012" (Cars with high-lift cam distributor: 0.014"-0.016"
Plug gap 0.020" - 0.022"
Ignition timing indication Belt Pulley and timing chain case
Ignition timing TDC


Clutch
Clutch type Single Dry Plate
Clutch linings Fabric


Brakes
Brake type Lockheed Hydraulic 2LS front only
Brake linings Ferodo MR19


Wheel Alignment
Toe-In nil
Camber 0±1°
Caster angle 2°±½°
King pin angle 9° to 10° 30'

Midget Series TF (1953-55)
Engine
Bore & Stroke 66.5mm x 90mm
Displacement 1250cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 70 lb./sq. in.


Fuel Supply
Carburetor Twin SU 1½" dia. semi-D/D H4
Standard GJ
Richer HI
Weaker GL


Valving
Intake tappet clearance 0.012" (hot)
Exhaust tappet clearance 0.012" (hot)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 5° BTDC


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.020" - 0.022"
Ignition timing indication Belt Pulley and timing chain case
Ignition timing TDC


Clutch
Clutch type Borg & Beck Single Dry Plate (8" dia.)
Clutch linings Wound yarn


Brakes
Brake type Lockheed Hydraulic 2LS front only
Brake linings Ferodo DM7


Wheel Alignment
Toe-In nil
Camber 1° positive to ½° negative on full bump
Caster angle 2°±0.5° with side member parallel with road
King pin angle 9° to 10° 30' full bump

Magnette Series KN and NA (1934-36)
Engine
Bore & Stroke 57mm x 84mm
Displacement 1286cc
Firing order 1,4,2,6,3,5
Oil pressure (hot) 60 - 80 lb./sq. in.


Fuel Supply
Carburetor Twin SU
Standard No. 3
Richer H4
Weaker V2


Valving
Intake tappet clearance 0.006" (hot)
Exhaust tappet clearance 0.008" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015" - 0.018"
Plug gap 0.015" - 0.018"
Ignition timing indication Flywheel
Ignition timing 20° BTDC


Clutch
Clutch type Single Dry Plate
Clutch linings Special, moulded in plate


Brakes
Brake type Shoe and cam, cable operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 3°
Caster angle 8° with 2° taper packing plate fitted
King pin angle 7° 30'

Magna Series L (1933-34)
Engine
Bore & Stroke 57mm x 71mm
Displacement 1087cc
Firing order 1,4,2,6,3,5
Oil pressure (hot) 60 - 80 lb./sq. in.


Fuel Supply
Carburetor Twin SU
Standard L
Richer R3
Weaker O7


Valving
Intake tappet clearance 0.006" (hot)
Exhaust tappet clearance 0.008" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015" - 0.018"
Plug gap 0.018"
Ignition timing indication -
Ignition timing TDC


Clutch
Clutch type Double Dry Plate
Clutch linings Ferodo MR


Brakes
Brake type Shoe and cam, cable operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2° 30'
Caster angle 7°
King pin angle 6° 30'

Magnette K3 Supercharged (1933-34)
Engine
Bore & Stroke 57mm x 71mm
Displacement 1087cc
Firing order 1,4,2,6,3,5
Oil pressure (hot) 80 - 100 lb./sq. in.


Fuel Supply
Carburetor SU 17⁄8"
Standard RM1 - RM2


Valving
Intake tappet clearance 0.008" (hot)
Exhaust tappet clearance 0.014" (hot)
Valve-timing indication Camshaft drive wheels
Intake valve opens 15° BTDC


Ignition
Breaker gap 0.015"
Plug gap 0.018"
Ignition timing indication -
Ignition timing TDC (fully retarded)


Clutch
Clutch type Special, in preselector gearbox
Clutch linings -


Brakes
Brake type Shoe and cam, cable operated
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 3°
Caster angle 6°
King pin angle 7° 30'

Magnette Series ZA (1953-56)
Engine
Bore & Stroke 73.025mm x 89mm
Displacement 1489cc
Firing order 1,3,4,2
Oil pressure (hot) 50 - 60 lb./sq. in.


Fuel Supply
Carburetor Twin SU semi-D/D
Standard GM
Richer M
Weaker GO


Valving
Intake tappet clearance 0.015" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Adjoining gearteeth marked
Intake valve opens 5° BTDC (TDC at 0.021" clearance)


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.019" - 0.021"
Ignition timing indication -
Ignition timing Static setting 8° BTDC (3⁄8" on pulley OD)


Clutch
Clutch type Borg & Beck Single Plate Dry
Clutch linings Wound yarn


Brakes
Brake type Lockheed Hyd. 2LS front only
Brake linings Ferodo DM12


Wheel Alignment
Toe-In nil
Camber 1°
Caster angle 3° positive
King pin angle 6°


1½ litre Series VA (1937-39)
Engine
Bore & Stroke 69.5mm x 102mm
Displacement 1548cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 80 lb./sq. in.


Fuel Supply
Carburetor Twin SU
Standard CO
Richer BK
Weaker CP


Valving
Intake tappet clearance 0.010" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Timing chain and wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.018"
Ignition timing indication Belt pulley and timing chaincase
Ignition timing TDC


Clutch
Clutch type Single Plate (Oil), later, dry
Clutch linings Cork inserts; later, fabric


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2°
Caster angle 4° 30'
King pin angle 8°


2 litre Series SA (1936-39)
Engine
Bore & Stroke 69mm; later 69.5mm x 102mm
Displacement 2288cc; later 2322cc
Firing order 1,5,3,6,2,4
Oil pressure (hot) 40 - 80 lb./sq. in.


Fuel Supply
Carburetor Twin SU
Standard CH
Richer CL
Weaker CK


Valving
Intake tappet clearance 0.015" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Timing chain and wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.018"
Ignition timing indication Belt pulley and timing chaincase
Ignition timing 7° BTDC


Clutch
Clutch type Single Plate (Oil)
Clutch linings Cork inserts


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2°
Caster angle 4°
King pin angle 8°


2½ litre Series WA (1939)
Engine
Bore & Stroke 73mm x 102mm
Displacement 2561cc
Firing order 1,5,3,6,2,4
Oil pressure (hot) 40 - 80 lb./sq. in.


Fuel Supply
Carburetor Twin SU
Standard EL
Richer EG
Weaker AM


Valving
Intake tappet clearance 0.015" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Timing chain and wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.018"
Ignition timing indication Belt pulley and timing chaincase
Ignition timing 4° BTDC


Clutch
Clutch type Borg & Beck Single Dry Plate
Clutch linings Fabric


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR


Wheel Alignment
Toe-In 3⁄16"
Camber 2°
Caster angle 4°
King pin angle 8°


1¼ litre Series Y (1947-50)
Engine
Bore & Stroke 66.5mm x 90mm
Displacement 1250cc
Firing order 1,3,4,2
Oil pressure (hot) 40 - 70 lb./sq. in.


Fuel Supply
Carburetor Single SU
Standard FI
Richer DK
Weaker EF


Valving
Intake tappet clearance 0.019" (hot)
Exhaust tappet clearance 0.019" (hot)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 11° BTDC


Ignition
Breaker gap 0.010" - 0.012"
Plug gap 0.020" - 0.022"
Ignition timing indication Belt pulley and timing chaincase
Ignition timing TDC


Clutch
Clutch type Borg & Beck Single Dry Plate
Clutch linings Fabric


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR19


Wheel Alignment
Toe-In nil
Camber -1°±1°
Caster angle 1°±½°
King pin angle 10° to 11½°


1¼ litre Series YB (1951-53)
Engine
Bore & Stroke 66.5mm x 90mm
Displacement 1250cc
Firing order 1,3,4,2
Oil pressure (hot) 50 lb./sq. in.


Fuel Supply
Carburetor Single SU
Standard FI
Richer DK
Weaker EF


Valving
Intake tappet clearance 0.019" (hot)
(Up to and including Engine No. XPAG/SC2/18096,
commencing at Engine No. XPAG/SC2/18097, 0.012)
Exhaust tappet clearance 0.019" (hot)
(Up to and including Engine No. XPAG/SC2/18096,
commencing at Engine No. XPAG/SC2/18097, 0.012)
Valve-timing indication Timing chain and timing wheels
Intake valve opens 5° BTDC


Ignition
Breaker gap 0.010" - 0.012" (0.014" - 0.016" for cars with high-lift cam distributor)
Plug gap 0.020" - 0.022"
Ignition timing indication Belt pulley and timing chaincase
Ignition timing TDC


Clutch
Clutch type Borg & Beck Single Dry Plate
Clutch linings Wound yarn


Brakes
Brake type Lockheed Hydraulic
Brake linings Ferodo MR19


Wheel Alignment
Toe-In nil
Camber 0°±1°
Caster angle 1°±½°
King pin angle 10°


ZB Magnette (1956-58)
Engine
Bore & Stroke 73.025mm x 88.9mm
Displacement 1489cc
Firing order 1,3,4,2
Oil pressure (hot) 50 lb./sq. in.


Fuel Supply
Carburetor Twin SU H4
Standard EQ
Richer -
Weaker M5


Valving
Intake tappet clearance 0.015" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Pulley and longest pointer
Intake valve opens 5° BTDC (TDC at 0.021" clearance)


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.019" - 0.021"
Ignition timing indication Pulley and pointer
Ignition timing 4° BTDC


Clutch
Clutch type Borg & Beck hydraulically operated
Clutch linings Wound yarn


Brakes
Brake type Lockheed drum
Brake linings Ferodo DM12


Wheel Alignment
Toe-In nil
Camber 1°
Caster angle 3°
King pin angle 6°


Magnette III (1959)
Engine
Bore & Stroke 73.025mm x 88.9mm
Displacement 1489cc
Firing order 1,3,4,2
Oil pressure (hot) 75 lb./sq. in.


Fuel Supply
Carburetor Twin SU HD4
Standard FU
Richer -
Weaker -


Valving
Intake tappet clearance 0.014" - 0.016" (hot)
Exhaust tappet clearance 0.014" - 0.016" (hot)
Valve-timing indication Timing gears
Intake valve opens TDC at 0.021" clearance


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.024" - 0.026"
Ignition timing indication Pulley and pointer
Ignition timing 8° BTDC


Clutch
Clutch type Borg & Beck 8" dia. hydraulically operated
Clutch linings Wound yarn


Brakes
Brake type Girling drum
Brake linings Ferodo AM4


Wheel Alignment
Toe-In 1⁄16" to 1⁄8"
Camber ¾° to 1°
Caster angle 1½°
King pin angle 6½°


MGA (1955-59)
Engine
Bore & Stroke 73.025mm x 88.9mm
Displacement 1489cc
Firing order 1,3,4,2
Oil pressure (hot) 50 lb./sq. in.


Fuel Supply
Carburetor Twin SU H4
Standard GS
Richer CC
Weaker 4


Valving
Intake tappet clearance 0.017" (hot)
Exhaust tappet clearance 0.017" (hot)
Valve-timing indication Pulley and longest pointer, timing wheels
Intake valve opens 16° BTDC (TDC at 0.060" clearance


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.019" - 0.021"
Ignition timing indication Pulley and pointer
Ignition timing 7° BTDC


Clutch
Clutch type Borg & Beck hydraulically operated
Clutch linings Wound yarn


Brakes
Brake type Lockheed drum
Brake linings Ferodo DM12


Wheel Alignment
Toe-In Nil
Camber 1° pos. to ½° neg on full bump
Caster angle 4°
King pin angle 9° to 10½° on full bump

MGA 1600 (1959-60)
Engine
Bore & Stroke 75.416mm x 88.9mm
Displacement 1588cc
Firing order 1,3,4,2
Oil pressure (hot) 50 lb./sq. in.


Fuel Supply
Carburetor Twin SU H4
Standard No. 6
Richer CC
Weaker 4


Valving
Intake tappet clearance 0.015" (hot)
Exhaust tappet clearance 0.015" (hot)
Valve-timing indication Pulley and longest pointer, timing wheels
Intake valve opens 16° BTDC (TDC at 0.060" clearance


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.024" - 0.026"
Ignition timing indication Pulley and pointer
Ignition timing 6° BTDC


Clutch
Clutch type Borg & Beck hydraulically operated
Clutch linings Wound yarn


Brakes
Brake type Lockheed disc brakes (front); drums (rear)
Brake linings Pads Capex 4; drum lining Don 24


Wheel Alignment
Toe-In Nil
Camber 1° pos. to ½° neg on full bump
Caster angle 4°
King pin angle 9° to 10½° on full bump

MGA Twin Cam (1959)
Engine
Bore & Stroke 75.416mm x 88.9mm
Displacement 1588cc
Firing order 1,3,4,2
Oil pressure (hot) 50 - 60 lb./sq. in.


Fuel Supply
Carburetor Twin SU H6
Standard OA6
Richer -
Weaker -


Valving
Intake tappet clearance 0.016" - 0.017" (cold)
Exhaust tappet clearance 0.015" - 0.017" (cold)
Valve-timing indication Gears and camshaft sprockets, crankshaft pulley
Intake valve opens 20° BTDC; exhaust closes 20° ATDC; intake and exhaust tappet displacement 0.069" - 0.082" at TDC


Ignition
Breaker gap 0.014" - 0.016"
Plug gap 0.024" - 0.026"
Ignition timing indication Pulley and pointer
Ignition timing TDC


Clutch
Clutch type Borg & Beck 8" dia. hydraulically operated
Clutch linings Wound yarn (reinforced)


Brakes
Brake type Dunlop Disc
Brake linings VG98


Wheel Alignment
Toe-In Parallel
Camber 1°
Caster angle 4°
King pin angle 10°