REPLACEMENT SPARES CATALOGUE

Parts Available Only to Club Members

Prescott HillGotheringtonCheltenham

Glos. GL52 9RDwww.prescott-hillclimb.com

Bugatti Replacements Parts Catalogue

Contents List

A Sections:-

1. Engine Parts2. Axles, Wheels and Brakes3. Steering4. Clutch5. Gearbox and transmission6. Chassis7. Engine Valves and Guides8. Springs9. Instruments and Miscellaneous Items10. Leather Items11. Washers and Gaskets12. Tools13. Fasteners14. Publications and Drawings15. Castings Numerical List with Photographs

B Data on:-

a. Bugatti Screw threadsb. Bugatti Steelsc. Tyre Gearingd. Lubrication Recommendations

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Some Parts Shown may be ‘Special Order Items Only’,Please Enquire for Availability and Latest Price

The Spares department functions as a service to Club members and can only operate with your support.Our prices remain competitive in relation to the quality standards that we insist upon from our suppliers.Stock items are readily available. Over the years much information has been compiled with regard toa source of supply for many parts which are not listed in the spares catalogue. If you cannot find theparts you require in the catalogue then please do contact us giving full details of your requirementsand we will pursue the matter for you.

The Spares Department is open Tuesday and Thursday between 0900 and 1630 hours UK time. Whenthe Department is closed, please do fax or e-mail your orders or inquiries and we will contact you onre-opening.

Trish Davis, Spares Controller.E-mail: spares@bugatti.co.ukTel: 0044 (0)1242 675496Fax: 0044 (0)1242 677001

Spares Department, Bugatti Owners’ Club, Prescott Hill, Gotherington, Cheltenham, Glos. GL52 9RD.

1. Engine Parts

Stock Code Description Model

1.1 Crankcase Castings

A129 Crankcase top 37, 37A, 40A151 Bearing Cap rear 37, 40A152 Bearing Cap front (bronze) 37,40A160 Bearing Cap centre 37, 40A14 Cap for Crankcase Breather (item 13)A55 Dynamo Cradle, at front of Crankcase 37A120 Dynamo Housing 44A141 Dynamo Housing 40A8 Oil Filler Cap, not lettered SeveralA98 Oil Filler Elbow 40A105 Front Engine Cover 35A150 Oil Pipe Take-off Fitting (bronze) 35, 37, 43A147 Oil Level Cover, R.H. side, square 35, 37, 43A155 Oil level float casing. Various

1.2 Cylinder Blocks and Pistons

Cylinder block castings for the following models are usually available, as the club owns appropriate patterns.Bare castings are sold on the basis that an approved machine shop does the machining under a separatecontract between the purchaser and the shop. Due to the risk of defects being found during machining theClub does not wish to sell castings direct for machining by other shops. Regularly available, but confirm:

37MOT60 T37 Block T37-4057MOT37 T57 Block T57

Normally blocks are supplied with standard bores (69mm), except Type 57 (72mm), but oversize can oftenbe arranged (e.g. T37 at 69.5 so that standard Volkswagen Polo Pistons (which are stocked) can be used)

Aluminium Plates, top of cylinder block, fully drilled.

C10A Aluminium Closing Plate 37, 40, 44, 49C10B Aluminium Closing Plate 35, 35B, 35C, 43C10C Aluminium Closing Plate 30, 35A, 38

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1.3 Cambox Castings

A126 Cambox Casing, less bushes 30, 35, 38, 43A86 Cambox lid for A126 30, 35, 38, 43A148 Cambox Casting, less bushes 37, 40A97 Cambox Lid (4 cylinder) 37, 41A79 Cover for Vertical Drive, front of block 37, 40A56 Air Pump Drive Housing, bronze, rear of

cambox, on which air pump sits 35A, 37A17 Step Up Gear Housing, rear of cambox 35, 43A99 Air Pump Body (bronze), remove one boss 35, 37A9 Water Elbow on cambox, circular flange

to make square at various angles 30, 35, 37A, 43, 44,49

A84A Water Elbow on cambox, RH 37, 40A84B Water Elbow on cambox, LH 37, 4057AC01 Cambox Casing 57, 5957AC02 Cambox Casing 57, 5957AC21 Cambox lid 57, 5957AC22 Cambox lid 57, 5957AC17 BRG Cap for the above 57, 5957AC18 BRG Cap for the above 57, 5957AC19 BRG Cap for the above 57, 5957AC20 BRG Cap for the above 57, 59

1.4 Blower And Drive

A20 Blower Drive Housing, rear casing 35B, 35C, 37A, 43, 51, 55A21A Front Cover for Blower Housing A20 35B, 35C, 37A, 51A21B Front Cover for Blower Housing A20,

G.P. models 43, 55A16 Nose Piece on Blower Drive Casing (bronze) 35B, 35C, 37A, 51

1.5 Inlet Manifolds

A131 Inlet Manifold, single carburettor 37A108 Manifold Adaptor, twin 30 Solex to block 37, 40, BresciaA108 A Manifold Adaptor, 35 Solex to block 37, 40, BresciaA103 Inlet Manifold, on block (pairs) 30, 35, 38, 43A149 Inlet Manifold, later long type BresciaA18 Inlet Manifold, Y-piece for blown engine 35B, 35C, 43A19 Safety Valve Cap, for item 18

(and 37A Manifold) 35B, 35C, 43, 37AA36 Inlet Manifold above Blower 51, 55A37 Safety Valve Housing for A36 51, 55A106 Ignition Tube Support (on manifold) 35, 43A145 Ignition Tube Support (on manifold) 37

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1.6 Water Pump Castings

A1A Water Pump Body. 35, 43A1B Water Pump Body. 51, 55A2 Water Pump Body, Large blown T37A. 37AA75 Water Pump Body, small pump. 37, 40A118 Water Pump Body (late type) 44A95 Water Pump Body (57 MOT 10) 57A3 Water Pump, Outer Cover, with water inlet

connection (large pump) 30, 35, 37A, 43, 44, 46A76 Outer Cover for small pump A75,

aluminium alloy 37, 40A76A Outer Cover for small pump A75, (bronze) BresciaA96 Outer Cover for A95 57A5 Impeller, water pump, large LH spiral 30, 35, 43, 46, 51, 55A6 Impeller, water pump, large RH spiral 37A, 44A77 Impeller, water pump, small aluminium alloy 37, 40A77A Impeller, water pump, small (bronze) Brescia

1.6 Water Pump Spindles

C39A Water pump spindle, short. 35, 43C39B Water pump spindle, medium. 37, 40C39C Water pump spindle, long, for integral

gear type. 35, 43, 51, 55C39D Water pump pkg- 100% Graphited PTFE -

1 metre

1.7 Water Manifolds

A102 Water Manifold, long RH side of engine 30, 35, 38, 43A138 Counterpiece for A102 30, 35, 38, 43A146 Water Manifold, cranked end 37, 40A91 Water Pipe, front of engine 35A100 Water Pipe, front of engine, early type

with extra offset (no recess in front cover) 35A88 Water Manifold, left side of engine 44A7 Water Manifold, right side of engine,

large inlet 37AA4 Water Pipe, front. 37AA39 Water pipe, lower to radiator (T57 solid engine) 57A73 Water Gallery Manifold, on block 57A80 Top Water pipe, Y piece, for thermometer. 57A72 Top Water pipe, Y piece, for thermometer. 51A132 Top Water pipe, Y piece, for thermometer. 55

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1.8 Oil Pumps

A139 Oil Pump Body 35, 38, 43, 51A142 Oil Pump Body 37, 40A140 Cover for A139, A142A144 Oil Pump Body BresciaA157 Oil Pump Body 44A158 Cover for A157 44A159 Relief Valve Cover 44A156 Oil Pump/Water Pump Drive Housing 4457MOT13 Oil Filter Base 57

1.9 Engine Gears

46MOT93 Oil Pump Drive, Fibre 46, 5057AC53 Camshaft Gear, Fibre 57, 57C57MOT317 Camshaft Gear, lower intermediate, fibre 5757MOT317(S) Camshaft Gear, Lower Intermediate, STEEL 57S57MOT318 Camshaft Gear, upper intermediate, c.iron. 57

1.10 Ball races

98202 Ball Race - Vertical drive Brescia6208 Ball Race - Rear Hub98209 Ball Race - Inside Clutch, Trunnion 45x85x11 Several Models4207 Ball Race - Output Shaft9202 Ball Race

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2. Axles, Wheels, Brakes

Steel Parts

C36 Front Axle Die Forging, for G.P. 35A, 37C38A Hand Forging for Brescia front axle BresciaC38B Hand Forging for Brescia front axle,

dropped for T13BresciaC35A Brake Drum Pressing, 270mm dia. Brescia, 35A, 37, 40C35B Brake Drum Pressing, large brakes,

uses fin casting A 128 44, 49C35C Shock Absorber DrumC23 Brake Lever Forging - Universal SeveralC27 Differential cruciform. 30-35C15A/L Wheel Nut, 4 eared, L/H.C15A/R Wheel Nut, 4 eared, R/H.C15B/L Wheel Nut, 2 eared, L/H. 37C15B/R Wheel Nut, 2 eared, R/H. 37C40A Tab Washer, between stub axle nuts SeveralC40B Tab Washer, front spring pivot block Touring, 57C44 Stub Axle Forging, from accurate, RH type,

remove one boss for LH G.P., BresciaC46 Front Brake Steel Backplate Spinning,

large brakes G.P., 43C51 Front Brake Backplate Spinning, small brakes Brescia, 37C47 Brake Cable Eye Forging SeveralC48 Brake Pulley SeveralC49 Brake Sprocket SeveralC50 Brake Chain (price per metre) Several6208 Ball Race, rear hub

Castings

A11 Hub End Cover, small 35A, 37, 40, 44, 49A12 Hub End Cover, large 35, 43, 51, 55A89 Brake Shoe, double, cast iron,

machines to two widths 35A, 37, 40, BresciaA32 Brake shoe ring, makes 2, aluminium, for

330mm SeveralA128 Brake Drum Fin Ring Casting, large brakes 44, 49, some 37A45 Brake Pedal Pad 35, 37, 51A82 Brake Pedal Pad Touring carsA64 Back Plate for rear brakes, large diameter,

machines to 35 or 43 35, 43, 51A101 Jacking Wedge, rear axle 35, 51A121 Jacking Pad on rear axle TouringA143 Thrust Collar, rear axle, H/T bronze Several57EA87 Brake Shoe, makes 2. 57 (Hydraulic)64EA1 Back plate, front. 57(Hydraulic)57PA140 Back plate, rear, RH 57(Hydraulic)57PA141 Back plate, rear, L.H. 57(Hydraulic)

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3. Steering Parts

C18 Steering Wheel, nickel plated centre,walnut rim G.P.

C18A Steering Wheel T57 57C18B Steering Wheel.- Brescia BresciaC29 Curved Steering Arm Die forging; in high

tensile material, with drawing and instructionsfor bending ball end after machining 35, 37

Castings

A38A Steering Extension Bracket (cast iron) 37AA38B Steering Extension Bracket (cast iron) 35B, 35C, 51A110 Steering Box Distance Block 44A70 Steering Box Housing 35, 37, 51A71 End Cover for A70 35, 37, 51A133 End Cover, heat treated for touring

steering box TouringA137 King pin Pulley Swivel/cover Several

4. Clutch Castings

A44 Clutch Tray below flywheel(larger radius than 35) 37, 37A

A87 Clutch Tray below flywheel 35, 51A74 Clutch Yoke Swinging Block 35, 37, 51A123 Clutch Cover (bronze) BresciaA85 Clutch Yoke Grunion, early cars (bronze) BresciaA153 Sliding Lever Yoke (bronze) SeveralA154 Adjusting Nut (bronze) SeveralA83 Clutch yoke swinging block 44, 4998209 Ball Race - Inside clutch trunnion, 45x85x11 Several

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5. Gearbox, Transmission Castings

A130 Gearbox case. BresciaA25 Gearbox Casing, G.P. 35, 37, 51A26 Gearbox Lid for item 25, 130 35, 37, 51, 30, late BresciaA34 Gearbox Top with provision for starter motor,

machines to 35 or 37 35, 37A27 Front Cover for item 25 35, 37, 51, 30, late BresciaA28 Layshaft End Cover for item 25 35, 37, 51, 30, late BresciaA29 Selector Box Housing for rear of

item 25 (bronze) 35, 37, 51, 30, late BresciaA30 Top Cover for item 29 (bronze) 35, 37, 51, 30, late BresciaA31 Front Cover for selector rods and

spring detents 35, 37, 51, 30, late BresciaA23 Gear Lever Gate, stainless steel casting 35, 37, 51, 30, late BresciaA122 Gearbox Filler Nut (to be threaded 50 x 1.5p) 35, 37, 51, 30, late Brescia57CV1 Gearbox Case Casting 57

Fabric heavy type couplings, propeller shaft,C33 Touring cars, 9mm bolts T57, 11mm bolts

(drill out)4207 Ball Race - output shaft 57

6. Chassis Castings

A42A Front Spring, Rear hanger, RH for G.P. 35, 37, 51A42B Front Spring, Rear hanger, LH for G.P. 35, 37, 51A92A Front Spring, rear hanger, RH Touring carsA92B Front Spring, rear hanger, LH. Touring carsA93 Cover for A92. Touring carsA49 Distance Block, rear shock absorber 35, 37, 51A10 Magneto Cradle on dash 35, 37A, 43, 51, 55A58 Magneto Cradle, twin type, on dash BresciaA47 Bracket, Aluminium, short, for A-R

mechanism. 35, 43A48 Bracket, Aluminium, long, for A-R mechanism. 37AA46 Bronze Pivot for A-R Lever 35, 37A, 43A50 Steering Column Bracket on dash, G.P. 35, 37, 51A81 Dynamo Cradle on dash, G.P. 35, 37A104 Accelerator Lever pivot Blocks 35, 37, 43A107 3-way Air Valve Body (bronze) 43A15 Tacho Pulley 35, 37A, 43, 51A78 Bonnet (hood) Hinge Bracket (bronze) Several

Tank - Castings

A40 Fuel tank collar, G.P. (bronze) 35, 37, 51A41 Fuel Tank Saddle Pieces, G.P. (bronze) 35, 37, 51A33 Tank Cap, eared, G.P. 35, 37, 51A59 Tank Cap, not eared, aluminium alloy TouringA60 Radiator Cap, for 65mm thread

(not T57) (bronze) Most cars

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7. Engine Valves And Guides (Not Angles)

G1-4I Inlet Valves for 69/72mm blocks (8 per block)G1-4E Exhaust Valves for 69/72mm blocks

(4 per block (x2 for 8 cylinder cars) 37, 40, 44, 49G1-3I Inlet Valve (23.5mm dia, stem 8, length 123mm,

30°) for 60mm blocks (not T30 or 38)G1-3E Exhaust Valves (35mm dia, stem 9, length

125mm, 45°) for 60mm blocks (not T30 or 38) 35, 43G1-3AI Inlet Valve (23.5mm dia, stem 8, length

123mm, 30°) for 60mm blocks Late 35G1-2 Valve for Brescia, all Exhaust Valve quality

(28mm dia, stem 8, length 113.5mm, 30°) BresciaG1-7 Valves T57, all Exhaust Valve quality

(41mm dia, stem 8, length 122.75mm, 45°) 57

Guides, Aluminium, Bronze

G2-4I Inlet Guides for valves G1-4G2-4E Exhaust Guides for valves G1-4G2-3I Inlet Guides for valves G1-3 or G1-3AG2-3E Exhaust Guides for valves G1-3 or G1-3AG2-2 Use T35 Inlet Guides and shorten upper

end G2 BresciaG2-7 Guides for valves G1-7 57

Valve Cotters

G3A Cotters for Valves, 8mm stem,G3B Cotters for 9mm stem.G3C Cotters for Valves, G1-7. 57, also 51

Valve Caps

G5A Valve Spring Top Cap with taper holefor cotter Inlet:30, 35, 38, 43

(8 per block)G5B Valve Spring Top Cap with taper hole

for cotter Exhaust: 30, 35, 38, 43(4 per block)

G5C Valve Spring Top Cap with taper holefor cotter Inlet: 37, 40, 44, 49

(8 per block)G5D Valve Spring Top Cap with taper hole

for cotter Exhaust: 37, 40, 44, 49(4 per block)

G5E Valve Spring Top Cap 57G4A Valve Adjustment Cap, 8mmG4B Valve Adjustment Cap, 9mm

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7. Engine Valves And Guides

Flanged Washers For Under Springs

G6A Flanged washer - 35 Inlet 35G6B Flanged - 35 Exhaust, 37 Inlet 35, 37G6C Flanged washer - 37 Exhaust 37G6D Flanged washer - '57 Inlet, Exhaust 57

8. Springs

F1A Inlet Double Valve Spring 30, 35, 43F1B Exhaust Double Valve Spring/Inlet

Double Valve 30, 35, 43F2B Exhaust and Inlet Double Valve Spring 37, 40F3 Prop. Shaft Coupling Spring (sets of 4)F4 Track Rod End Spring (sets of 4) 40F4A Track Rod End Spring (sets of 4) 38, 43, 44F5 Crankshaft Vibration Damper Spring

(sets of 12) 57F6 Clutch Springs (pairs) G.P.F7A Shock Absorber Springs 5.5 dia Section G.P.F7B Shock Absorber Springs 6.0dia Section G.P.F8 Brescia Double Valve Spring Brescia F10 Air Pump Spring (on cambox) G.P.F11 Inlet/Exhaust Double Valve Spring - T57 57F12 Inlet/Exhaust Triple Valve Spring 51F13 Water Pump Greaser Spring

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9. Miscellaneous Items Including Kits of Parts And Accessories

C4/700 Tacho Belt 700mm G.P.C4/710 Tacho Belt 710mm G.P.C4/720 Tacho Belt 720mm G.P.C4/730 Tacho Belt 730mm G.P.C4/740 Tacho Belt 740mm G.P.C4/750 Tacho Belt 750mm G.P.C4/760 Tacho Belt 760mm G.P.C4/785/35 Dynamo Drive Belt -T35 37A, 43C4/820 Dynamo Drive Belt -T35 37A, 43C5A Radiator Badge - Round DotC5B Radiator Badge - Square DotC6 Patent Plate for dash, brass, black

enamel on etchingC7 Mirror and drawing for holder G.P.C9 Brass Disc for end of rear spring cross

tube, embossed Bugatti TouringC11 Replica Repusseau (Boyce sports model

radiator thermometer: kit of parts includingringcasting, thermometer and engraved platewith instructions)

C12 Hand Operated Air Pump KitC13 Spare Wheel ‘Bull Ring’C16 Garage Wallplate - Replica of Molsheim original

with Bugatti in correct colours and styleC17 Official B.O.C. Colour Card.C20 Purolator Oil Filter Element. VariousC21 Walnut Knob for hand brake lever G.P.C22A Tool Holders, GP Spare Wheel, 330mm

Brake DrumC22B Tool Holders, GP Spare Wheel, 270mm

Brake DrumC24A Pressure Gauge Huile, 2kg G.P.C24B Pressure Gauge, Essence calibration G.P.C25 Hand Operated Oil Transfer Pump KitC31A Headlamp Bulb, 12v double contactC31B Headlamp Bulb, 12v single contactC31C Headlamp Bulb, Halogen, 12v 40/45WC31D Headlamp Bulb, (Yellow) 12v single contact.C31E Festoon Bulb, 12v, 18w, 15mm x 44mmC31F Headlamp Bulb, Halogen-12v 50wC32A Grease nipple - aluminium - No Longer StockedC32B Grease nipple - brassC34 Windscreen Frame with apron strip,

screws and G.P.C34A Windscreen glass G.P.C35C Shock Absorber Drum G.P.C40C Tab Washer for shackle pinsC42A Ignition Tube. High voltage resin coated, with 35, 43C42B Ignition Tube. (Small diameter). 37, 40C45 Bonnet Hinge VariousC53 Brass Plug for cambox Various

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Other Miscellaneous Items Normally Stocked

M1 Beru spark plug terminalsM2 Beru hose clipsM3 Throttle ball joint, G.P.M4 Eyelets for body screwsM5/A6 Sparking PlugM5/A7 Sparking PlugM5/A8 Sparking PlugM6 Spring clip coverM7 Drain tapM8 Wax Filled Thermostat T57M9 Thermometer Bulb As Supplied in C11 KitM10 Silent Bloc Bush TouringM11 Throttle Ball Joints T44/49M12 Wiring Grommet for Dash SeveralM13 Bulkhead Wiring Grommet T57

10. leather Items

Leather Discs

C1A Steering Column, 110 x 10.4 holes on 95 p.c.d.-C1B Steering Column Leather discC1C Blower Coupling, 105 x 40 x 12, 8 holes

Leather Links

C2A S/Abs. & Torque Arm Leather Link G.P.C2B S/Abs. Leather Link BresciaC2C Torque Arm Leather Link, 60mm centres,

16mm Various TouringC2D Shock Absorber Leather Link, 120mm centres. BresciaC2E Torque Arm Leather Link, 110mm centres.(T57) 57

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C53 Brass Plug for cambox VariousC55A/8 Oil Union Banjo, 7mm Bolt, 8mm Feed PipeC55B/6 Oil Union Banjo, 9mm Bolt, 6mm Feed PipeC55B/9 Oil Union Banjo, 9mm Bolt, 8mm Feed PipeC55C/12 Oil Union Banjo, 16mm Bolt, 12mm Feed PipeC55C/16 Oil Union Banjo, 16mm Bolt, 16mm Feed PipeC57 Grand Locking Plate T37/37A/40

11. Washers And Gaskets

C3A Copper Washer for 7mm union.C3B Copper Washer (folded) for 9mm unions.C3B-ALUM Alum Washers for 9mm Oil Unions (SEE C3P)C3C Copper Washer (folded) for 16mm unions.C3D Copper Clad Exhaust Flange Joint. 30, 25, 37, 40, 43, 44 etc.C3L Copper Clad Exhaust Flange Joint,

for 52mm dia.C3A Copper Washer for 7mm union.C3B Copper Washer (folded) for 9mm unions.C3B-ALUM Alum Washers for 9mm Oil Unions (SEE C3P)C3C Copper Washer (folded) for 16mm unions.C3D Copper Clad Exhaust Flange Joint. 30, 25, 37, 40, 43, 44 etc.C3E/E Gasket, Exhaust Manifold. 35, 43C3E/I Gasket, Inlet Manifold. 35, 45C3F/E Gasket, Exhaust Manifold 35, 46C3F/I Gasket, Inlet Manifold.C3G/E Gasket, Exhaust Manifold- Copper Clad - T57 57C3G/I Gasket, Inlet Manifold. 57C3H Water manifold, rubber seal,C3J Copper Clad Exhaust flange Joint 57C3K Felt Washers for rear axle. Sets of 8 per axle T30-55

12. ToolsA few, difficult to find tools, are stocked for Members’ convenience

Taps and Dies for Bugatti special threads.

T1 5mmx0.75 TapT2 7mmx1.0 TapT3 9mmx1.25 TapT4 11mmx1.25 TapT5 5mmx0.75 DieT6 7mmx1.0 DieT7 9mmx1.25 DieT8 11mmx1.25 DieT9 5mm Body DrillT10 7mm Body DrillT11 See T11/5:T11/6:T11/8:T11/A.T12 See T12/5:T12/6:T12/8.T13 Peg Spanner for brass plugs on camboxT14 Tool for body screwsT15 Oil Union SpannerT16 HUB PULLER smallT17 HUB PULLER largeT18 18mm plug spannerT19 Valve spring compressorT20 Grease Gun, Wanner type, for hexagonal nipplesT21A Bugatti Vice, large type, Exact replica of worksT21B Bugatti Vice, small type. Exact replica of works

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13. Fasteners

Plain Nuts

B1A 5 x 0.75 8 Hex - plain nutB1B 7 x 1 10 Hex, H.T.-plain nutB1C 9 x 1.25 13 Hex plain nutB1D 11 x 1.25 16 Hex - plain nutB1E 9 x 1 13 Hex, H.T.- plain nutB1F 14 x 1 25 20 Hex,.- plain nut

Castellated Nuts

B2A 7 x 1 10 Hex - castle nutB2B 9 x 1.25 13 Hex - castle nutB2C 11 x 1.25 16 Hex - castle nutB2D 14 x 1.25 20 Hex - castle nutB2E 12 x 1.5 17 Hex - castle nutB2F M6 x 1, 9 Hex Castle Nut (For Steering Taper

Brass Nuts

B6A 7 x 1 10 Hex (Exhaust) - brass nutB6B 9 x 1.25 13 Hex - brass nut (Cambox)

Fasteners

B3A 5 x 0.75(Countersunk square head 13 long) boltB3B 5 x 0.75 Square Head 20 long - boltB3C 5 x 0.75 Body ScrewB3E 5 x 0.75 Square Head 50 long - boltB3F 5 x 0.75 Countersunk Screw 18 long - boltB3G 5.x 0.75 Countersunk Square Head 22 long - boltB3H 5 x 0.75 Square Head 13 long boltB3J 5 x 0.75 Countersunk Square Head, stainless, 13

6x1

B3AA 6 x 1 Countersunk Square Head 13 long - boltB3D 6 x 1 Body ScrewB4N 6 x 1 Countersunk Slotted Wheel ScrewB4P 6 x 1 Countersunk Square Head Wheel Screw

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7x1

B4A23 7 x 1 Square Head 23 longB4A30 7 x 1 Square Head 30 longB4A43 7 x 1 Square Head 43 longB4A55 7 x 1 Square Head 55 longB4F 7 x 1 10mm Hex 35 longB4G 7 x 1 9mm Hex 20 long (Shock absorber)B4H 7 x 1 Stepped Slotted Head long (Steering coupling)B4Q 7 x 1 Countersunk Slotted Head screw 20 longB4S 7 x 1 12mm Hex 20 long (Brake backplate)B4J 7 x 1 10mm Hex 118 long (Cambox)B4K 7 x 1 10mm Hex 118 long with threaded extensionB4U 7 x 12 long inter block boltB6C Cambox centering screwB6F 7 x 1 Semi-finished Stud 50 longB6J 7mm x 35cm long steel bar.

9x1

B4M 9 x 1 Big end bolt with slotted nut

9x1.25

B4B30 9 x 1.25 Square Head 30 longB4B50 9 x 1.25 Square Head 50 longB4B65 9 x 1.25Square Head 65 longB4BB100 9x1.25 Square head, high tensile 100 longB6D 9mm Rocker screw

11x1.25

B4D 11x1.25 Square Head 105 long.B4E 11x1.25 Square Head 50 long.B4R 11 x 1.25 16mm Hex 55 long (Prop shaft)B4T 11 x 1.25 Countersunk slotted head screw 30 long

Oil Union Bolts

B5A 7 x 1 10 Hex 20 long - oil union boltB5B 9 x 1.25 6 Hole Knurled Head 40 long - oil unionB5C 9 x 1.25 6 Hole Knurled Head 52 long - oil unionB5D 9 x 1.25 6 Hole 7 x 1 Tapped Head 40 long - oilB5E 16 x 1.25 Hex 32 long - oil union bolt

Cotter Pins

B6E 10mm 7 x 1 thread cotter pin (Brake lever)B6G 9mm 5 x 0.75 thread cotter pin (Camshaft bevel)B6H 9mm 7 x 1 thread cotter pin (Vertical drive)

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15. Castings Numerical list

Material: Unless otherwise stated parts are cast in good commercialquality aluminium or bronze as appropriate

Stock Code Description Model

A1A Water Pump Body. 35, 43A1B Water Pump Body. 51, 55A1C Water Pump BodyA2 Water Pump Body, Large blown T37A. 37AA3 Water Pump, Outer Cover 30, 35, 37A, 43, 44, 46A3C Water Pump, Outer CoverA4 Water Pipe, front. 37AA5 Impeller, water pump, large LH spiral 30, 35, 43, 46, 51, 55A5C Impeller, Water Pump,75mm dia.A6 Impeller, water pump, large RH spiral 37A, 44A7 Water Manifold, right side of engine,

large inlet 37AA8 Oil Filler Cap, not lettered SeveralA9 Water Elbow on cambox 30, 35, 37A, 43, 44,49A10 Magneto Cradle on dash 35, 37A, 43, 51, 55A11 Hub End Cover, small 35A, 37, 40, 44, 49A12 Hub End Cover, large 35, 43, 51, 55A13 Crankcase Breather Elbow 37, 40A14 Cap for Crankcase Breather (item 13)A15 Tacho Pulley 35, 37A, 43, 51A16 Nose Piece on Blower Drive Casing (bronze) 35B, 35C, 37A, 51A17 Step Up Gear Housing, rear of cambox 35, 43A18 Inlet Manifold, Y-piece for blown engine 35B, 35C, 43A19 Safety Valve Cap, for item 18

(and 37A Manifold) 35B, 35C, 43, 37AA20 Blower Drive Housing, rear casing 35B, 35C, 37A, 43, 51, 55A21A Front Cover for Blower Housing A20 35B, 35C, 37A, 51A21B Front Cover for Blower Housing A20,

G.P. models 43, 55A22 Blower CasingA23 Gear Lever Gate, stainless steel casting 35, 37, 51, 30, late BresciaA24A Bronze cap without greaser bossA24B Bronze cap with greaser bossA25 Gearbox Casing, G.P. 35, 37, 51A26 Gearbox Lid for item 25, 130 35, 37, 51, 30, late BresciaA27 Front Cover for item 25 35, 37, 51, 30, late BresciaA28 Layshaft End Cover for item 25 35, 37, 51, 30, late BresciaA29 Selector Box Housing for rear of item 25

(bronze) 35, 37, 51, 30, late BresciaA30 Top Cover for item 29 (bronze) 35, 37, 51, 30, late BresciaA31 Front Cover for selector rods and spring

detents 35, 37, 51, 30, late BresciaA32 Brake shoe ring, makes 2, aluminium,

for 330mm Several

16

A33 Tank Cap, eared, G.P. 35, 37, 51A34 Gearbox Top with provision for starter motor 35, 37A36 Inlet Manifold above Blower 51, 55A37 Safety Valve Housing for A36 51, 55A38A Steering Extension Bracket (cast iron) 37AA38B Steering Extension Bracket (cast iron) 35B, 35C, 51A39 Water pipe, lower to radiator

(T57 solid engine) 57A40 Fuel tank collar, G.P. (bronze) 35, 37, 51A41 Fuel Tank Saddle Pieces, G.P. (bronze) 35, 37, 51A42A Front Spring, Rear hanger, RH for G.P. 35, 37, 51A42B Front Spring, Rear hanger, LH for G.P. 35, 37, 51A44 Clutch Tray below flywheel

(larger radius than 35) 37, 37AA45 Brake Pedal Pad 35, 37, 51A46 Bronze Pivot for A-R Lever 35, 37A, 43A47 Bracket, Aluminium, short, for A-R

mechanism. 35, 43A48 Bracket, Aluminium, long, for A-R

mechanism. 37AA49 Distance Block, rear shock absorber 35, 37, 51A50 Steering Column Bracket on dash, G.P. 35, 37, 51A55 Dynamo Cradle, at front of Crankcase 37A56 Air Pump Drive Housing 35A, 37A58 Magneto Cradle, twin type, on dash BresciaA59 Tank Cap, not eared, aluminium alloy 35, 37, 51A60 Radiator Cap, for 65mm thread (not T57)

(bronze) Most carsA61 Boyce Ring casting (part of C11)A62 Pump handle (part of C12)A63 Pump End Flange (part of C12)A64 Back Plate for rear brakes 35, 43, 51A70 Steering Box Housing 35, 37, 51A71 End Cover for A70 35, 37, 51A72 Top Water pipe, Y piece, for thermometer. 51A73 Water Gallery Manifold, on block 57A74 Clutch Yoke Swinging Block 35, 37, 51A75 Water Pump Body, small pump. 37, 40A76 Outer Cover for small pump A75,

aluminium alloy 37, 40A76A Outer Cover for small pump A75, (bronze) BresciaA77 Impeller, water pump, small aluminium alloy 37, 40A77A Impeller, water pump, small (bronze) BresciaA77B Impeller, Water Pump, Small BronzeA78 Bonnet (hood) Hinge Bracket (bronze) SeveralA79 Cover for Vertical Drive, front of block 37, 40A80 Top Water pipe, Y piece, for thermometer. 57A81 Dynamo Cradle on dash, G.P. 35, 37A82 Brake Pedal Pad Touring carsA83 Clutch yoke swinging block 44, 49A84A Water Elbow on cambox, RH 37, 40

17

A84B Water Elbow on cambox, LH 37, 40A85 Clutch Yoke Trunnion, early cars (bronze) BresciaA86 Cambox lid for A126 30, 35, 38, 43A87 Clutch Tray below flywheel 35, 51A88 Water Manifold, left side of engine 44A89 Brake Shoe, double, cast iron, machines

to two 35A, 37, 40, BresciaA89A Brake Shoe, double, aluminium, machines

to twoA90 PistonA91 Water Pipe, front of engine 35A92A Front Spring, rear hanger, RH Touring carsA92B Front Spring, rear hanger, LH. Touring carsA93 Cover for A92. Touring carsA95 Water Pump Body (57 MOT 10) 57A96 Outer Cover for A95 57A97 Cambox Lid (4 cylinder) 37, 41A98 Oil Filler Elbow 40A99 Air Pump Body (bronze), remove one boss 35, 37A100 Water Pipe, front of engine, early type 35A101 Jacking Wedge, rear axle 35, 51A102 Water Manifold, long RH side of engine 30, 35, 38, 43A103 Inlet Manifold, on block (pairs) 30, 35, 38, 43A103A Water Inlet Manifold (narrow radiator) 35AA104 Accelerator Lever pivot Blocks 35, 37, 43A105 Front Engine Cover 35A106 Ignition Tube Support (on manifold) 35, 43A107 3-way Air Valve Body (bronze) 43A108 Manifold Adaptor, twin 30 Solex to block 37, 40, BresciaA108A Manifold Adaptor, 35 Solex to block 37, 40, BresciaA110 Steering Box Distance Block 44A111 Bonnet (hood) catch, Body castingA113 Oil transfer pump body.A118 Water Pump Body (late type) 44A120 Dynamo Housing 44A121 Jacking Pad on rear axle TouringA122 Gearbox Filler Nut (to be threaded 50 x 1.5p) 35, 37, 51, 30, late BresciaA123 Clutch Cover (bronze) BresciaA124 Switch leverA126 Cambox Casing, less bushes 30, 35, 38, 43A127 Water Pump Body (bronze)A128 Brake Drum Fin Ring Casting, large brakes 44, 49, some 37A129 Crankcase top 37, 37A, 40A130 Gearbox case. BresciaA131 Inlet Manifold, single carburettor 37A132 Top Water pipe, Y piece, for thermometer. 55A133 End Cover, heat treated for touring

steering box TouringA134A Crankcase bearer arm, r/h.A134B Crankcase bearer arm, l/h.

18

A136A Dash bracket RHA136B Dash bracket LHA137 King pin Pulley Swivel/cover SeveralA138 Counterpiece for A102 30, 35, 38, 43A139 Oil Pump Body 35, 38, 43, 51A140 Cover for A139, A142A141 Dynamo Housing 40A142 Oil Pump Body 37, 40A143 Thrust Collar, rear axle, H/T bronze SeveralA144 Oil Pump Body BresciaA145 Ignition Tube Support (on manifold) 37A146 Water Manifold, cranked end 37, 40A147 Oil Level Cover, R.H. side, square 35, 37, 43A148 Cambox Casting, less bushes 37, 40A149 Inlet Manifold, later long type BresciaA150 Oil Pipe Take-off Fitting (bronze) 35, 37, 43A151 Bearing Cap rear 37, 40A152 Bearing Cap front (bronze) 37,40A153 Sliding Lever Yoke (bronze) SeveralA154 Adjusting Nut (bronze) SeveralA155 Oil level float casing. VariousA156 Oil Pump/Water Pump Drive Housing 44A157 Oil Pump Body 44A158 Cover for A157 44A159 Relief Valve Cover 44A160 Bearing Cap centre 37, 40A161 Oil Filter Housing Casting.A162 Filter Base Casting 35A163 Brescia Water Pipe ( Inlet )A164 Brescia Water Pipe (Outlet )A165 Brescia Dumb Iron castingsA166 Brescia Rear Axle Castings (pair)A167 Aluminium FootplateA168A T35 Bulkhead Support Bracket L/HA168B T35 Bulkhead Support Bracket R/HA170 Solex Carburettor LeverA171 Throttle Pedal Lever - Bronze Most TypesA172 Block Tap Elbow T35/43 & OthersA173 Crank Nut Locking Ring T35/43 & OthersA174 Starting Handle Grip - Aluminium Most TypesA175 Marchal Dynamo Cover 100mm - AluminiumA176 Advance/Retard Lever 40A177 Marchal Switch Levers Various

19

Bugatti Steels

Apart from normal mild or medium carbon steels, Bugatti used widely on shafts, axles, and gears good qualitylow carbon nickel chrome based hardening steels, often not case hardened. Such parts are usually stampedwith the maker's reference number.

C4/700 Tacho Belt 700mm G.P.AD3 (Aubert & Duval)

Carbon 0.12% max.Nickel 3-3.5%Chrome 0.5 - 1%Modern equivalent SAE 3310, En 36B Typical strength 120,000 p.s.i., 55tons sq. in., 85kg mm_ Case when hardened, Diamond hardness 700,Rockwell61C

NCAV (Aubert & Duval) as AD3 with rather more caron, approachingMH2 (Marine) 140,000p.s.i. 65 tons sq in., 100kg mm2

CR-X (Holtzer)

897 (Aubert & Duval)

JC2 3% Ni. C - H steel

Case depths quoted on drawings are generally 0.8-1mm(.03-04 inches) before grinding. For valve caps do notexceed 0.25-0.3mm (-.010 - 012in) preferably by cyanide hardening.

Tyre gearing

Modern Types Turns per mile

6.00 x 19 660Racing 6805.00 x 19 648Racing 6776.00/6.50 x 20 7105.50/5.25 x 19 7285.00/4.75 x 19 7444.50 x 19 7004.00 x 19 7355.50 x 18720 x 90 B.E.

Lubrication Recommendations

Engine: Roller bearing types Castrol R40Other Castrol GP50

Any "straight" 40(Modern SAE 20-50 oils are less suitable for single-cam engines, in the opinion of some experienced owners)

Gearbox: EP 90Rear Axle: EP140Steering box: EP 140Water pump: Heavy industrial grease, such as Mobil AA (not soft lithium-based chassis grease).

20

21

Bugatti Screw Threads

Dia x pitch (millimetres)

Usual Use Occasional Use Type of Thread

4 x 0.75 Old French standard5 x 0.75 Old French standard6 x 1 S.I.7 x 1 S.I.8 x 1.25 S.I.

9 x 1 e.g. conn. rod bolts9 x 1.25 S.I.

10 x 1 pipe threads10 x 1.5

11 x 1.2512 x 1.25 pipe threads12 x 1.5

14 x 1.25 S.I. spark plug15 x 1.5 Early Brescia pipe fittings

16 x 1.2518 x 1.5 S.I. spark plug20 x 1.5

Any mm diameter, usually 1.5 pitch, coarser on radiator cap etcN.B. Early 16 valve cars used Whitworth gas threads, e.g. 1/4 gas, 0.518 in x 19

Torques

Suggested torques for standard Bugatti nuts, based on experience.

Normal Maximum

5mm 4 lb. ft. 6 lb. ft.6mm 6 97mm 8 139mm 20 3011mm 33 56(1 lb. ft. = 0.14 m.k.g.)

22

HIA

HIB

HIC

HID

HIE

HIF

Also Available from Bugatti Trust

C15B

B4U

C40B

23

57 EA 87

A64

A11

A12

A32

A128

A121

A101

C39

A83

24

T11

T13

T12

T15(See T1-T4)

C 43G

C3A

C3B

C3C

C3E/I

C3F/I

C3G/I

C3D

C3E/E

C3F/E

C3G/E

25

C10A

C10B

C10C

C3H

C3K

C3J

C3L

26

T5

T6

T7

T8

T4

T3

T2

T1

T9

T10

A44(A87Similar)

A153

A154

A85

27

46MOT93

57MOT317

57AC53

57MOT318

A38A

A38B

A70

A110

A133

A71

A137

28

B 4JB 4K

B 4A23B 4A30B 4A43B 4A55

10mm B 6C11mm B 6C

B 6F

C 41

B 4FB 4GB 4SB 4HB 4Q

B 6D

B 4BB100

B 4B50B 4B65

B 4M

37MOT60

B 4B30

29

C24A C24B

98209

98202

6208

4207

30

C8 PistonBlank

T17 T16

31

C39C

C39B

C39A

B 4E

B 4D

B 5C

B 5B

B 5A

B 4R

B 4T

B 5D

B 5E

B 6G

B 6E

32

B 1D

B 1E

B 2D

B 2E

B 6B

B 1C

B 1B

B 1A

B 2A

B 2B

B 2C

B 6A

B 3A

B 3G

B 3J

B 3H

B 3AA

B 3D

B 3B B 3E

B 3F

B 3C

B 4N

B 4P

33

A40

A41

A60

A33

A59

M1

M6

M7

C3A

M5

M2

M4 C42C

34

C16

C45

C34A

C42A

C42B

C34

F1

F1B

F6

F7A

F7B

F2B

F3

F4

F5

F13

F8

35

G5A

G5B

G5C

G5D

G5E

G4A

G4B

G3A

G3B

G3C

G2-4I

G2-4E

G2-3I

G2-3E

G2-7

36

64EA1

57PA141

A89

57PA140

C1A

C1B

C2A

C2D

C1C

C2B

C2C

C2E

37

C11 (Kit*)

C21

C6

C7

C5

C9

C32A

C32B

C53

C31E

C31A

C20

*This Includes Holder Casting ‘A61’ and Thermometer Bulb’M9’, also the ‘Nameplate’ as Shown

38

C4

C36

39

G1-4I

G1-3E

G1-3AI

G1-3I

G1-4E

G1-2

G1-7

A92B

A49

A93

A10

A50

A47

A81

A78

A92A

A42

A58

A15

A104

40

C35A

C23

C47

C49

C48

C40A

C35B

C44

C50

C46

A25

A34

A29

A30

A31

A26

A27

A28

C33

A23

A122

41

57AC21/22

A84A

A84B

57AC17

57AC18

57AC19

57AC20

A138A10D

A73

A80

A88

A7

A72

42

A86

A148

A79

A56

A99

A126

A97

A9

A17

A129

A55

A120

A98

A8

A105

A151

A13

A141

A150

A147

A155

43

A142

A156

A158

A139

A140

A144

A131

A108A

A18

A19

A37

A108

A103

A36

A145

A106

44

A21A

A21B

A2

A75

A127

A3

A5

A6

A77

A77A

A1A

A1B

A95

A118

A76

A76A

A96