Vehicle Class:
Classic British Sports Car
Target Audience:
Triumph TR4 owners, classic car enthusiasts, mechanics specializing in British sports cars.
Competitors:
MG MGB, Austin-Healey Sprite/Midget, Jaguar E-Type (higher end).
Vehicle Strengths:
Robust chassis, potent straight-six engine, enjoyable driving dynamics, distinctive styling.
Manual Value Proposition:
Essential resource for maintaining and repairing the TR4, enabling owners to preserve its originality and performance.
Engine Systems:
Engine overhaul, tuning, carburetor adjustment, ignition system, cooling system, lubrication system
Transmission Systems:
Gearbox overhaul, clutch operation, driveshaft and differential maintenance
Chassis Systems:
Suspension overhaul (front and rear), steering system, brake system (hydraulic and mechanical), wheel alignment
Electrical Systems:
Wiring diagrams, lighting, ignition, starter, dynamo/alternator, dashboard instruments, accessories
Bodywork And Trim:
Body panel repairs, interior trim, convertible top mechanism, glass replacement
Estimated Pages:
300-400 (typical for comprehensive workshop manuals of this era)
Type:
Workshop Service Repair Manual
Format:
PDF (assumed for modern digital reproduction)
Comprehensive Coverage:
Engine, drivetrain, suspension, steering, brakes, electrical, fuel, cooling, exhaust, body, interior
Maintenance And Tune Up:
Regular servicing, lubrication, filter changes, ignition timing adjustment, carburetor tuning, valve clearance adjustment
Troubleshooting And Diagnosis:
Identification of common faults, diagnostic flowcharts, symptom-based troubleshooting for engine, electrical, and mechanical issues
Rebuilding And Overhaul:
Detailed step-by-step instructions for engine rebuild, gearbox rebuild, differential overhaul, brake system overhaul, carburetor rebuilding
Adjustment And Calibration:
Carburetor synchronization, brake adjustment, clutch adjustment, steering box adjustment
Wiring And Electrical Repair:
Detailed wiring diagrams, component testing, repair of electrical faults
Depth:
Comprehensive, covering everything from basic maintenance to full mechanical and electrical component overhauls and rebuilds.
Digital Format Quality:
High-resolution scans, searchable text (OCR'd if available), clear image reproduction of diagrams and illustrations.
Print Quality Standard:
Professional quality printing, clear black and white line drawings and diagrams, legible text.
Binding Type Standard:
Spiral-bound or perfect-bound (for printed versions), allowing for lay-flat use in a workshop environment.
Paper Type Standard:
Durable, semi-gloss or matte paper stock to withstand workshop conditions.
Engine Type:
Inline 6-cylinder, Overhead Valve (OHV)
Displacement:
2138 cc (130.4 cu. in.)
Bore X Stroke:
74.6 mm x 81.3 mm (2.94 in. x 3.20 in.)
Compression Ratio:
8.5:1 (typical)
Horsepower Gross SAE:
105.5 bhp @ 4,750 rpm (approximate)
Torque Gross SAE:
127.5 lb-ft @ 3,000 rpm (approximate)
Carburetors:
2 x SU HS6 Semi-Downdraft Carburetors
Fuel Type:
Leaded Gasoline (or equivalent modern unleaded with additive)
Cooling Type:
Water-cooled, pressurized
Oil Capacity:
7 pints (approx. 3.3 liters)
Recommended Oil Viscosity:
20W-50 (e.g., Castrol Classic XL 20W-50)
Transmission Type:
4-speed Manual with Laycock Overdrive (optional)
Overdrive Availability:
Optional Laycock de Normanville overdrive (typically on 3rd and 4th gears)
Clutch Type:
Single dry plate, hydraulically operated
Gear Ratios Manual:
3.45:1 (1st), 2.21:1 (2nd), 1.41:1 (3rd), 1.00:1 (4th) - may vary slightly by production date.
Gearbox Oil Type:
EP 90 Gear Oil (API GL-4)
Gearbox Oil Capacity:
3.5 pints (approx. 1.65 liters)
Crash Safety Era:
Pre-modern safety standards; designed in the late 1950s/early 1960s.
Braking System:
Front Disc Brakes (Girling), Rear Drum Brakes.
Parking Brake:
Mechanical, operating on rear wheels.
Seat Belts:
Optional; typically lap belts were available.
Windscreen:
Laminated safety glass (optional on early models, standard on later ones).
Roll Over Protection:
None inherent to standard design; aftermarket roll bars often fitted by enthusiasts.
Audio System:
Optional push-button radio (e.g., Lucas, Motorola), typically mono speaker.
Nil:
No modern driver assistance systems were available or standard.
Nil:
No external connectivity features (e.g., Bluetooth, USB) were present.
Oil Change Interval:
Every 3,000 miles (4,800 km) or 6 months, whichever comes first.
Grease Points Interval:
Every 1,000 miles (1,600 km) or before long journeys.
Tune Up Interval:
Annually or every 6,000 miles (9,600 km).
Coolant Type:
Water with anti-freeze/anti-corrosion additive (e.g., ethylene glycol based).
Brake Fluid Type:
DOT 3 or DOT 4 Hydraulic Brake Fluid (Glycol-based).
Clutch Fluid Type:
DOT 3 or DOT 4 Hydraulic Brake Fluid (shared reservoir with brakes).
Radiator Cap Pressure:
7 psi (approximate)
Common Engine Problems:
Oil leaks (especially from rear crankshaft seal), carburetor icing (in cold weather), potential valve seat recession on unleaded fuel without additive.
Common Transmission Problems:
Worn synchromesh rings (difficulty engaging gears), overdrive switch failure, output shaft seal leaks.
Common Chassis Problems:
Corrosion (especially sills, floors, wheel arches), worn kingpins and bushes, weak rear springs, steering box wear.
Common Electrical Problems:
Wiring harness degradation, dynamo/alternator output issues, switch failures, Lucas electrics quirks.
Oil Filter Part Number:
Fram PH4, Purolator L10000, Champion P131 (or equivalent modern equivalent like Wix 51334).
Spark Plug Part Number:
Champion L11Y, Lodge RS, NGK BPR5ES (or equivalent).
Manufacturer:
Standard-Triumph Motor Company, later part of British Leyland.
Key Models:
TR series (TR2, TR3, TR4, TR5, TR6, TR7, TR8), Herald, Spitfire, Stag.
Predecessor:
Triumph TR3A
Successor:
Triumph TR5 (fuel-injected) / TR250 (US market)
Design Inspiration:
Designed by Giovanni Michelotti, based on TR4 styling cues but sharing chassis components with TR2/3.
Production Years:
1961-1965
Production Volume:
Approximately 40,000 units
Manufacturing Locations:
Coventry, England
