Category Archives: Austin-Healey

Austin Healey Sprite – M. G. Midget CRITICAL NUT & BOLT TORQUES

Austin Healey Sprite – M. G. Midget

CRITICAL NUT & BOLT TORQUES

Dimensions are in lbs/foot unless otherwise stated.

(information from SPRITE, MIDGET, 1958-71 AUTOBOOK, by Kenneth Ball, Autopress Ltd. 1971)

Cylinder head nuts (except Sprite IV and Midget III) 40
Sprite IV and Midget III (studs 22 or small indent) 50
Sprite IV and Midget III (plain studs) 42
Main bearing cap bolts 60
Big-end cap bolts (except Sprite IV and Midget III) 35
Sprite IV and Midget III 45
Crankshaft pulley nut 70
Gudgeon pin clamp screw 25
Flywheel bolts 35 to 40
Rocker pedestal nuts 25
Sump to crankcase bolts 6
Rocker cover bolts 4
Oil pump securing bolts (Sprite IV and Midget III) 12
Oil filter 10 to 15
Steering column pinch bolt (Sprite IV and MidgetIII) 10
Deep-pressed cylinder side cover (Sprites III and IV, Midgets II and III) 5
Steering wheel nut 41
Disc to hub 40 to 45
Caliper to hub 45 to 50
  Steering column – top fixing bolts 12 to 17
    pinion pinch bolt 9 to12
  Steering wheel nut 37
  Master cylinder port adaptors 33
  Plastic reservoir fixing bolts 5
  Pressure failure switch (nylon) 15 lb in
  Pressure failure switch assembly end plug 200 lb in
Front hub nuts 25 to 65

Austin Healey Sprite – M. G. Midget IGNITION SYSTEM DETAILS

Austin Healey Sprite – M. G. Midget

IGNITION SYSTEM DETAILS

(information from SPRITE, MIDGET, 1958-71 AUTOBOOK, by Kenneth Ball, Autopress Ltd. 1971)

Spark plug type all capacities cxcept Sprite IV and Midget III Champion N5
Spark plug type (Sprite IV and Midget III) Champion N9Y
Spark plug gap 0.025
Contact breaker gap 0.014
Static setting, Premium fuel:  
  948 cc (high compression) Sprite I 5 deg. before TDC
  948 cc (high compression) Sprite II and Midget I 4 deg. before TDC
  1098 cc (high copression) Sprite III and Midget II 5 deg. before TDC
  1275 cc (high comression) Sprite IV and Midget III 7 deg. before TDC
  1275 cc (Sprite IV and Midget III) Exhaust emission control 4 deg. before TDC
Static setting (low compression):
  948 cc (Sprite II and Midget I) 1 deg. before TDC
  1098 cc (Sprite III and Midget II) 3 to 5 deg. before TDC
  1275 cc (Sprite IV and Midget III) 7 deg. before TDC
Stroboscope setting at 600 engine rev/min:
  1098 cc (Sprite III and Midget II) 8 deg. before TDC
  1275 cc (Sprite IV and Midget III) at 1200 rev/min 22 deg.
Stroboscope setting at 1000 engine rev/min:
  1275 cc (Sprite IV and Midget III) Exhaust emission control 10 deg. before TDC
Distributor type (lucas)
  Sprite I D.M.2-P.H.4
  948 cc Sprite II and Midget I D.M.2-P.4
  1098 cc and later 125 cc 25 D.4
  1275 cc (early – no vacuum control) 23 D.4
Coil type (Lucas):
  All models except Sprtie IV and Midget III L.A. 12
  Sprite IV and Midget III 11 C.12

Austin Healey Sprite – M. G. Midget SU CARBURETOR DETAILS

Austin Healey Sprite – M. G. Midget

SU CARBURETOR DETAILS

Dimensions are in inches unless otherwise stated.

(information from SPRITE, MIDGET, 1958-71 AUTOBOOK, by Kenneth Ball, Autopress Ltd. 1971)

Type (Sprite I) SU H.1 (two)
Needle (normal) GG
Type (Sprite II and Midget I, 948 cc) SU H.S.2 (two)
Needle (Standard) V3
Needle (Rich) V2
Needle (Weak) GX
Spring Light Blue
Type (1098 cc Sprite II and Midget I) SU H.S.2 (two)
Needle (Standard) GY
Needle (Rich) GG
Needle (Weak) M
Spring Blue
Type (1098 cc Sprite III, Midget II, 1275 cc Sprite IV, Midget III SU H.S.2 (two)
Needle (Standard) AN
Needle (Rich) H6
Needle (Weak) GG
Spring blue
Spring (Sprite IV and Midget III) Light Blue
Fuel pump (all models except Sprite III and IV and Midget II and III) AC ‘Y’ type (mechanical)
Sprite III and IV, Midget II and III SU type A.U.F. (Electric)
Type (1275 cc Sprite IV, Midget III) Exhaust emission control SU H.S.2 (two)
Specification: Exhaust emission control:  
  Fixed needle type AUD 266
  Spring-loaded type AUD 328
Needle, fixed type, exhaust emission control AN
  Spring-loadaed type, exhaust emission control AAC
Piston spring, exhaust emission control Blue
Initial jet adjustment, exhausted emission control 11 flats from bridge
Idling speed, exhaust emission 1000 rev/min
Fast-idle speed, exhaust emission 1100 to 1200 rev/min

Dupont / BMC Paint Reference Page

Dupont / BMC Paint Reference Page

Here is a BMC Paint Chip page from 1964 through 1967 that I got from Dupont.  They scanned this page from their books, The great thing about this page is they update it with notes for modern colors.  Please note the “cmp” means closest match possible.   This page would cover Austin-Healey’s, MGs, Minis and others of the era.

Click to Enlarge

67dupontpaintcode

Big Healey Critical Nut & Bolt Torques

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


CRITICAL NUT & BOLT TORQUES  

Torque wrench settings:    
     A and B  Cylinder head studs 400 lb in (4.6 kg m)
     A and B  Cylinder head nuts 900 lb in (10.4 kg m)
     A and B  Main bearing nuts 900 lb in (10.4 kg m)
     A and B  Connecting rod screws 600 lb in (6.91 kg m)
     A and B  Front cover screws (less than) 150 lb in (1.73 kg m)
     A and B  Front mounting plate screws 200 lb in (2.30 kg m)
     A and B  Rear mounting plate screws 600 lb in (6.91 kg m)
     A and B  Flywheel bolts 600 lb in (6.91 kg m)
     A and B  Rocker shaft bracket nuts 324 lb in (3.72 kg m)
     A and B  Bell housing bolts 420 lb in (4.83 kg m)
     A and B  Clutch to flywheel 300 lb in (3.45 kg m)
     A and B  Differential cap nuts 780 lb in (8.99 kg m)
     A and B  Crown wheel bolts 680 lb in (7.83 kg m)
   Pinion bearing nut 1680 lb in (19.4 kg m)
            Wheel nuts (pressed steel wheel)  750 lb in (8.64 kg m)
   Steering wheel nut 492 lb in (5.76 kg m)

Big Healey Weights & Dimensions

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


WEIGHTS, AND DIMENSIONS 

 

Weights of components:    
     Engine   611 lbs (277 kg)
     Gearbox standard   79.5 lbs (36.227 kg)
     Gearbox with overdrive   117 lbs (52.907 kg)
     Rear axle   166 lbs (75.454 kg)
Dimensions:    
     Wheelbase   7 ft 8 (2.34 m)
     Overall length   13 ft 1 1/2 (4.00 m)
     Overall height   4 ft 1 (1.24 m)
               (hood down)   3 ft 10 (1.17 m)
     Overall width   5 ft 1/2 (1.54 m)
     Height over scuttle   3 ft (.091 m)
     Ground clearance   5 1/2 (.14m)
     Track front   4 ft 3/4 (1.24 m)
     Track rear   4 ft 2 (1.27 m)
     Turning circle   35 ft (10.67 m)
     Weight approx.   2436 lbs (1105 kg)

Big Healey Electrical Components

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


ELECTRICAL SYSTEMS

Electrical equipment:    
     Battery:    
     A Type (home standard) GTW.9A
  Dry charged export  GTZ.9A
     B Series BN7 standard  SLG.11 E(two)
  Dry charged export SLGZ.11 E (two)
  Series BT7, BJ7, BJ8 standard BT.9A
  Dry charged export BTZ.9A
     A and B Capacity 58 amp/hr
     A and B Voltage 12 positive earth
     A and B Electrolyte per cell 1 pint (.57 litre)
     A and B Initial charge 3.5 amp
     A and B Normal recharge 5 amp
     A and B Master Switch Lucas ST.330
Generator    
     A and B Type Lucas C.45 Pv-5
  Mks I and II Lucas C.45 PV-6
  MkIII  Lucas C.42
     A and B Cutting in speed 1100 to 1250 rev/min
                  MkIII 1250 rev/min
     A   Maximum Output 22 amps, 13.5 volts (1700 to 1900 rev/min)
     B   25 amps, 13.5 volts (1700 to 1900 rev/min)
     MkIII   30 amps, 13.5 volts (1250 rev/min)
     A and B  Field resistance 6 ohms
     MkIII   4.5 ohms
Starting motor;    
     A and B   Lucas M.418.G
     A and B Lock Torque 17 lb ft (1.2858 kg m)
                 at 440 to 460 amps and 7.0 to 7.4 v
     A and B Lock current draw 430 to 450 amps at 7.0 to 7.4 volts
     A and B Light running current 45 amps at 7400 to 8500 rev/min
     A and B Solenoid switch Lucas ST.950
     A and B Brush length (minimum) .3125 (7.94 mm)
  Spring tension (max.) 30 to 40 ozs (850 to 1133 gm)
Overdrive:    
     A and B Control switch Lucas 2TS
     A  Transmission solenoid Lucas TGS.1
     B   Lucas 11.S
     A and B  Relay Lucas SB.40/1
     A  Interrupter switch Lucas 5510/1
     B   Lucas SS.10
     A and B  Rotary throttle switch Lucas RTS.1
Control box:    
     A and B Mks I and II Lucas RB.106/2
  Mk III Lucas RB.340
     A and B Cut in voltage 12.7 to 13.3v
  Drop off voltage 8.5 to 11 v
  Mk III 9.5 to 11 v
     A and B Reverse current 3.5 to 5 amps
  Mark III 3.0 to 5 amps
     A and B Regulator setting @ 68F (20C) 16.0 to 16.6 v at 3000 rev/min
     A and B  For temperatures above add .1 v for 10C
   For temperatures below subtract .1 v for 10C
     MkIII 10C (50F) 14.9 to 15.5v
  20C (68F) 14.7 to 15.5v
  30C (86F) 14.5 to 15.1v
  40C (104F)  14.3 to 14.9v
     MkIII Current regulator  30 ?1 amp
Windscreen wiper:    
     A and B Mks I and II Lucas DR.2
               Mks II and III from #60792  Lucas DR.3.A
     A and B Normal running current 2.3 to 3.1 amp
     A and B                Stall Current (hot) 8 amp
  (cold) 14 amp
     A and B Armature resistance .34 to .41 ohm
     A Field Resistance 12.8 to 14 ohm
     B   8.0 to 9.5 ohm
  High output (red mark) 8.0 to 11.5 ohm
  Mk III running current 2.7 to 3.4 amp
  Mk III wheelbox drive Rack and cabie
  Mk III armature float .008 to .012 (.20 to .30 mm)
  Mk III wiping speed  45 to 50 cycles per min
Fuses:    
     A and B   Lucas SF.6
     A and B  A1 to A2 50 amp
                A3 to A4 35 amp
Sidelamps:    
     A and B   Lucas 594
Headlamps:    
     A and B   Lucas F.70.0
Stop/tail lamps   Lucas 594
Number plate lamp   Lucas 467/2
Flashing indicator unit   Lucas FL.5

Big Healey Drivetrain Details

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


AXLES, HUBS, SUSPENSION, WHEELS, AND BRAKE DETAILS

Rear axle:    
     A and B  Type 3/4 floating
     A   Ratio Standard 3.91:1
     B   3.545:1
     A   With Overdrive 4.1:1
     B   3.909:1
     A and B  Final Drive Hypoid bevel
     A   Teeth on crownwheel and pinion,  
                standard 43/11
     B   39/11
     A   With overdrive 41/10
     B   43/11
     A and B Crownwheel/pinion backlash Marked on crownwheel
     A and B Adjustment Marked on crownwheel Shims
     A and B  Oil capacity 3 pints (1.704 litres)
Rear springs:    
     A and B  Type Semi-elliptic
     A   Number of leaves 7
     B   Mark I, II, and III 7
               Mark III from #26705 6
     A and B  Thickness of leaves 6 at .1875 (4.76 mm)
                 1 at .15625 (4 mm)
     B   MkIII 4 at .1875 (4.8 mm)
                 2 at .15625 (4 mm)
     A and B  Width 1 3/4 (44.5 mm)
     A and B  Deflection 4 ? 1/4 (101.6 mm)
                MkIII 5 1/4 (133.35 mm)
     A and B  Loaded camber 1/2 (12.70 mm) ?1/8
               Mk III 1 (25.4 mm)
     A and B   3 at .03125 (.80 mm)
Steering:    
     A and B  Type Cam gears and peg
     A Ratio   14:01
    15:01
From car BN4 #68960 and BN6 1995    
     A and B  Track toe-in .0625 to .125 (1.58 to 3.17 mm)
     B   Steering lock angle Outer 20 deg.
                 Inner 21 deg.
Suspension:    
     A and B  Front type Coil spring, wishbone
     A and B  Castor angle 2 deg.
     A and B  Camber angle 1 deg.
     A and B  Swivel pin inclination 6 1/4 deg.
     A and B  Rear type Semi-elliptic leaf underslung, Panhard rod
     A and B  Shock absorbers Armstrong lever hydraulic
Brakes    
     A and B  Type Girling hydraulic
     A   Front Two leading shoes
     B   Disc
     A and B  Drum diameter 11 (280 mm)
     B  Disc diameter 11 (285 mm)
     A and B  Shoe lining width 2 1/4 (57 mm)
     A   Shoe lining length 10.4 (265.6 mm)
     B   10.53 (267.4 mm)
     A   Thickness .167 to .174 (4.24 to 4.42 mm)
     B   .187 (4.76 mm)
            Disc pad thickness .40625 (10.32 mm)
     A and B  Pedal free movement .125 (3.175 mm)
     A   Frictional area 188 sq in (1213 sq cm)
     B   Rear 95 sq in
                Disc 4 x 4.25 sq in
                 4 x (10.8 sq cm)
     A and B  Handbrake Mechanical rear wheels
Tyre sizes and pressures;    
     A   5.90 x 15 tubeless
     B   5.90 x 15 road speed (with tubes)
     A and B  Front 20 lb/sq in (1.41 kg/sq cm)
              Rear 25 lb/sq in (1.76 kg/sq cm)
     Maximum performance speeds increase all   
     pressures by   5 lb/sq in (.35 kg/sq cm)
Wheels:    
     A and B   4J x 15 ventilated steel disc or
                 4J x 15 wire (optional)

Big Healey Gearbox Specs

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


CLUTCH & GEARBOX DETAILS

Clutch:    
      A and B make   Borg and Beck
     A   Mks I and II type Dry plate
     B   Mks II and III (from No. 29F.4898) 9 DSG diaphragm
     A   Diameter 9 (229 mm)
     B   Mks I and II 10 (254 mm)
     A   Friction area 2 x 36.5 sq in (235 sq cm)
     B   2 x 39 sq in (241.5 sq cm)
     A and B  Thickness .150 (3.8 mm)
     A and B  Release bearing Copper carbon graphite
     A   Number of springs 9
     B   12
     B   Colour of springs Yellow/light green
     A   Total axial spring pressure 1215 to 1305 lb (551 to 592 kg)
     B   1620 to 1740 lb (735 to 789 kg)
     A and B  Distance thrust race to thrust plate .10 (2.54 mm)
     A and B  Thrust plate travel to fully released .42 to .47 (10.66 to 11.93 mm)
     B        Mks II and III from No. 29F.4898    
               Clutch plate diameter   9.63 (203.2 mm)
               Material   Wound yarn
               Number of damper springs   6
               Damper spring load   110 to 120 lb (49.8 to 54.3 kg)
               Damper spring colour   Dark grey/light green
               Release bearing   Graphite (MY3D)
               Fluid   Castrol Girling Amber Brake Fluid
Transmission:    
     A and B  Gearbox type Synchromesh on 2, 3, top
     A and B  Gear type Helical constant mesh
     A and B  Overdrive type Laycock de Normanville (electric control)
     A                           Gear Ratios     First 3.076:1
     B   2.93:1
     From engine #10897 (overdrive)    
     Engine #11342 (without overdrive)   2.83:1
     MkIII   2.637:1
     A      Second 1.913:1
     B                            As above   2.053:1
                 2.06:1
                 2.07:1
     A      Third  1.333:1
     B   1.309:1
                 1.31:1
                 1.306:1
     A      Overdrive third  1.037:1
     A and B      Fourth  Direct
     A      Overdrive  .778:1
     B   .822:1
     MkIII   .820:1
     A      Reverse  4.16:1
     B   3.78:1
                 3.72:1
     MkIII   3.391:1
Standard box:    
     A      First  12.027:1
     B                           (3.545:1 axle)   10.386:1
     From engine #11342   10.209:1
     Mk III   9.348:1
     A      Second 7.48:1 
     B   7.877:1
                  7.302:1
                 7.341:1
     A      Third  5.212:1
     B   4.640:1
                 4.743:1
                 4.629:1
     A      Fourth 3.91:1
                 3.545:1
     A      Reverse 16.4:1
     B   13.4:1
                 13.127:1
                 12.021:1
Including overdrive:    
     A      First  12.6:1
     B                           (3.909:1 axle)    11.453:1
     From engine #10897   11.257:1
     MkIII   10.308:1
     A      Second  7.84:1
     B   8.025:1
                 8.052:1
                 8.095:1
     A      Third  5.47:1
     B   5.116:1
                 5.120:1
                  5.105:1
     A      Third, overdrive 4.24:1
     B   4.195:1
                 4.198:1
                 4.188:1
     A      Fourth  4.1:1
     B   3.909:1
     A      Fourth, overdrive 3.19:1
     B   3.205:1
                 3.205:1
                 3.207:1
     A      Reverse  17.1:1
     B    14.776:1
                 14.541:1
                 13.255:1
Layshaft bearing:    
     A and B Type Needle roller
     A and B Number of rollers 46
     A and B Length of roller 1.551 (39.6 mm)
     A and B Diameter of roller 3.118 (3 mm)
     B  End float .0120 (.30 mm)
Mainshaft bearing:    
     A and B Make R&M
     A and B Type MJ 35
     A and B Size 1.39 x 3.15 x .827 (35 x 80 x 21 mm)
First motion shaft bearing:    
     A and B Make R&M
     A and B Type IM.J40.G
     A and B Size 1.58 x 3.55 x .905 (40 x 90 x 23 mm)
Oil capacity standard box   5 pints (2.8 litres)
Oil capacity overdrive fitted   6 1/4 pints (3.6 litres)
   Synchromesh hubs end float      Second  .007 (.18 mm)
                    Third. fourth  .031 (.8 mm)

Big Healey Ignition System Details

Austin-Healey

Tech Data for 100/6 & 3000, Mk 1 – 2- 3

(information from AUSTIN-HEALEY: OWNERS WORKSHOP MANUAL, by Kenneth Ball, Autopress Ltd. 1973)


Dimensions are in inches unless otherwise stated

“A” refers to the 2639 cc engine with 2 port head
“B” refers to the 2912 cc engine 
“C” refers to the 2639 cc engine with 6 port head


While I have tried to be accurate as possible, it is very likely that there are typos and errors on this page.  Please note that no one associated with austin-healeys.com assumes any liability arising from the information presented here.  If you find a mistake, please let me know from the contact page and I will correct it.


IGNITION SYSTEM DETAILS

Ignition system:    
     Sparking plugs:    
               A and B type   Champion UN.12.Y
               A and B gap   .024 to .026 (.6 mm to .66 mm)
     Coil:    
               A and B type   Lucas HA12
     Distributor:    
               A and B type   Lucas DM6A
               B Mks II and III (from Engine #    
               29F.35630) (from Serial #40966B)  Lucas 25 D6
               C   Lucas DM6
               A and B   Direction of rotation-anticlockwise
               A and B  Contact points gap .014 to .016 (.356 to .406 mm)
               A and C  Static setting 6 deg. BTDC
               B Mk I 5 deg. BTDC
               Mks II and III 10 deg. BTDC
               A and B Maximum advance 35 deg. BTDC
               C   36 deg. BTDC
               B Stroboscopic timing 15 deg. BTDC (at 600 rev/min)
               B Dwell angle 35 deg. ?3 deg
               A Condenser capacity .2mF
               B Mk II (series BJ7) .1mF
                MkIII .18 to .23mF
               B Coil resistance 3.1 to 3.5 ohms
                 MkIII        34 to 38 deg. (at 6400 rev/min)
               Vacuum advance starts 5 (12.7 cm)
               Vacuum advance ends 16 deg. at 12 (30.4 cm)
               Decelerating check 28 to 32 deg. (at 4400 rev/min)
                 22 to 26 deg. (at 3400 rev/min)
                 15 to 19 deg. (at 2000 rev/min)
                 10 to 16 deg. (at 1500 rev/min)
                 2 to 8 deg. (at 1100 rev/min)