TRIUMPH TR7 Service Repair Manual

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🏷️ Basic Information Identification Make: Triumph Model: TR7 Body Style: Sports Car (Coupe and Convertible) Codes Chassis Code Prefix: TR7 Vin Code: TR7 👋 Introduction Market Position Segment: Affordable British...

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Type: Car

Vendor:

Sku: 196484

Tags: Car Cars TR Models TR7 Triumph

Product variants

Description

🏷️ Basic Information

Identification

Make:

Triumph

Model:

Body Style:

Sports Car (Coupe and Convertible)

Codes

Chassis Code Prefix:

Vin Code:

👋 Introduction

Market Position

Segment:

Affordable British sports car, competing with models like the Datsun 240Z/260Z, Mazda RX-7, and some European GTs of the era.

Target Audience:

Enthusiasts seeking accessible, sporty motoring with a British character.

Competitive Analysis

Competitors:

Datsun 240Z/260Z, Toyota Celica GT, Alfa Romeo GT Veloce, Fiat 124 Sport Spider, MGB GT.

Key Features

Design:

Wedge-shaped styling by Harris Mann, available as coupe and convertible, distinctive pop-up headlights.

Performance Oriented:

Rear-wheel drive, sporty handling characteristics, powerful (for its class) 4-cylinder engine.

📋 Manual Details

Coverage Areas

Primary Coverage:

Mechanical, Electrical, Body, and Maintenance

Secondary Coverage:

Troubleshooting, Diagnostics, Specifications, Wiring Diagrams

Page Count

Estimated Page Count:

300-400 pages (typical for comprehensive service manuals of this era)

Manual Type

Type:

Factory Service Repair Manual / Workshop Manual

Language

Language:

English

Format

Format:

Print (Original) / Digital (PDF reproduction likely)

📖 Manual Coverage

Systems Covered

Engine:

2.0L Inline-4 (Triumph Dolomite Sprint derived), including fuel injection (Lucas) and carburetion variants, engine assembly, tuning, and overhaul.

Transmission:

4-speed manual (standard), 5-speed manual (optional overdrive), 3-speed automatic (Borg-Warner BW35 optional). Includes gearbox overhaul, clutch service, drive shafts.

Suspension:

Front: MacPherson struts, independent, anti-roll bar. Rear: Live axle, four-link, trailing arms, coil springs. Includes shock absorbers, bushings, alignment.

Brakes:

Front: Disc brakes (solid or ventilated depending on year/market). Rear: Drum brakes. Includes hydraulic system, calipers, wheel cylinders, parking brake.

Steering:

Rack and pinion, power steering optional. Includes steering column, linkages, steering rack assembly.

Electrical System:

12-volt negative ground. Includes battery, alternator, starter motor, ignition system, lighting, instruments, power windows, wipers, horn.

Bodywork And Chassis:

Monocoque construction. Includes body panel repair, corrosion prevention, door mechanisms, window mechanisms, seat adjustment, trim.

Fuel System:

Carburetor (Stromberg CD175, Zenith) or Lucas electronic fuel injection. Includes fuel pump, fuel lines, fuel tank, filters.

Cooling System:

Pressurized system with radiator, fan (mechanical), thermostat, water pump, coolant hoses.

Exhaust System:

Single exhaust manifold, catalytic converter (later models), muffler, tailpipe.

Procedures Included

Maintenance:

Regular service intervals, oil changes, filter replacements, spark plug checks, brake fluid changes, coolant flushes, lubrication points.

Diagnostics:

Troubleshooting guides for common faults, electrical circuit diagnosis, mechanical system checks, performance issue resolution.

Repair:

Step-by-step instructions for component removal, overhaul, and installation of major systems like engine, transmission, brakes, suspension, steering.

Adjustment:

Carburetor tuning, ignition timing adjustment, brake adjustment, valve clearance adjustment, clutch free play.

Engine Rebuild:

Detailed procedures for engine disassembly, component inspection, machining specifications, reassembly, and break-in.

Wiring Diagrams:

Comprehensive and detailed electrical wiring schematics for all vehicle systems, crucial for electrical troubleshooting.

Technical Depth

Depth:

Comprehensive, covering everything from basic preventative maintenance to complete engine and transmission overhauls, including factory specifications and tolerances.

📊 Manual Specifications

File Format

Digital Format:

PDF (commonly available for reproduction), potentially searchable text for ease of use.

Print Quality

Print Quality:

Originals: High quality, detailed line drawings and photographs. Reproductions: Variable, but good quality PDFs aim to preserve original detail.

Binding Type

Original Binding:

Hardcover or softcover, bound for durability in a workshop environment.

Paper Type

Original Paper Type:

Durable, matte finish paper to minimize glare in workshop lighting.

⚙️ Engine Specifications

Primary Engine

Engine Code:

LE (Federal USA), ES (UK/Europe)

Displacement:

2.0 Liters (1996 cc)

Configuration:

Inline-4, overhead camshaft (OHC)

Bore X Stroke:

90.3 mm x 76.0 mm

Compression Ratio:

8.0:1 or 9.0:1 (depending on market and fuel grade)

Performance

Horsepower Gross:

105 bhp @ 5500 rpm (Federal USA, Stromberg carb)

Horsepower Gross Federal:

105 bhp @ 5500 rpm (US spec, Lucas EFI) or 105 bhp @ 5500 rpm (US spec, Carbureted)

Torque Gross:

170 Nm (125 lb-ft) @ 3500 rpm (approximate)

Fuel System

Fuel Delivery:

Twin Stromberg CD175 carburetors or Lucas electronic fuel injection (Federal models).

Fuel Type:

Unleaded gasoline (87-91 octane recommended)

🔧 Transmission

Standard

Type:

4-speed manual transaxle (integrated gearbox and differential unit)

Optional

Type 1:

5-speed manual (Laycock de Normanville overdrive on 4th gear, optional)

Type 2:

3-speed automatic (Borg-Warner BW35)

Features

Clutch:

Hydraulically operated, single dry plate

Gear Ratios 4 Speed:

1st: 3.159, 2nd: 2.057, 3rd: 1.376, 4th: 1.000, Reverse: 3.223 (typical)

Fluid Type

Manual Transmission Fluid:

GL-4 Hypoid Gear Oil, SAE 90 (e.g., Castrol EPX 90, Mobilube GL-4 75W-90)

Fluid Capacity

Manual Transmission Capacity:

Approx. 2.0 liters (1.75 Imperial pints)

📐 Dimensions

Exterior

Length:

162.2 inches (4120 mm)

Width:

66.0 inches (1676 mm)

Height:

49.7 inches (1262 mm) (Coupe)

Wheelbase:

91.7 inches (2329 mm)

Front Track:

54.0 inches (1372 mm)

Rear Track:

54.0 inches (1372 mm)

Weights

Curb Weight:

Approx. 2500-2700 lbs (1135-1225 kg) depending on configuration

Gross Vehicle Weight Rating:

Approx. 3400 lbs (1542 kg)

Cargo

Trunk Volume:

Approx. 7-8 cubic feet

🛡️ Safety Features

Ratings

NHTSA Rating:

Not rated under modern NHTSA standards

Active Features

Brakes:

Front disc, rear drum. Parking brake operates on rear wheels.

Steering:

Rack and pinion steering, power steering available on some models.

Passive Features

Seatbelts:

3-point inertia reel seatbelts (front), lap belts (rear)

Headrests:

Integrated headrests on front seats

Rollover Protection:

Structural integrity and windshield frame for convertible models.

💡 Technology Features

Infotainment

Radio:

Factory fitted AM/FM radio, optional cassette player on later models.

Speakers:

Typically two dashboard-mounted speakers.

Driver Assistance

Cruise Control:

Not typically offered as standard or common option.

Power Windows:

Optional feature on many models.

Connectivity

Modern Connectivity:

None, as this is a classic vehicle. Modern audio head units with Bluetooth are common aftermarket upgrades.

🔧 Maintenance

Service Intervals

Oil Change:

Every 3,000 miles or 6 months

Oil Filter Replacement:

At every oil change

Spark Plug Replacement:

Every 12,000 miles or 12 months

Air Filter Replacement:

Every 6,000 miles or 12 months

Coolant Flush:

Every 24,000 miles or 24 months

Brake Fluid Change:

Every 12,000 miles or 12 months

Fluid Specifications

Engine Oil:

API SF/CD, SAE 20W-50 or 10W-40 (depending on climate), e.g., Castrol GTX 20W-50.

Engine Oil Capacity:

Approx. 4.5 Liters (4.7 US Quarts) with filter change

Coolant:

Ethylene Glycol based antifreeze, mixed 50/50 with distilled water.

Brake Fluid:

DOT 3 or DOT 4, glycol-based

Power Steering Fluid:

ATF Type F or Dexron II (if equipped with power steering)

Known Issues

Rust Prone Areas:

Wheel arches, sills, door bottoms, rear trailing arm mounts, battery tray area. Requires diligent rust prevention and repair.

Carburetor Issues:

Stromberg CD carburetors can be sensitive to vacuum leaks and require regular adjustment; potential for diaphragm failure.

Electrical Gremlins:

Lucas electrical components are known for reliability issues; wiring harness degradation can occur over time.

Suspension Wear:

Bushings, ball joints, and tie rod ends can wear, affecting handling and requiring replacement.

Cooling System Overheating:

Can be susceptible to overheating if cooling system maintenance is neglected; radiator efficiency and fan operation are critical.

Fuel Injection System:

Lucas EFI systems can be complex to diagnose; fuel pump, pressure regulator, and injector seals are common failure points.

📚 Vehicle History

Brand Heritage

Manufacturer:

British Leyland (Triumph division)

Previous Models:

Successor to the Triumph TR6, aimed at modernizing the sports car offering.

Model Evolution

Introduction Year:

Major Updates:

Introduction of fuel injection (Federal models), optional 5-speed transmission, revised suspension tuning, updated interiors.

Production

Production Years:

1975-1981

Production Locations:

Canley, Coventry, UK; Speke, Liverpool, UK; later built under license in the USA (Malta, Ohio - Triumph-Michelotti TR7/TR8).

Total Production Units:

Approximately 115,000 units (including TR8)

🏆 Awards & Recognition

Recognitions

Historical Acclaim:

While not a recipient of major awards in the traditional sense, the TR7 is recognized for its distinctive styling and its place in the lineage of Triumph sports cars.

Ratings

Consumer Reports Ratings:

Historical consumer reports often highlighted its sporty handling and styling, but also noted typical British Leyland build quality issues and reliability concerns.

Certifications

Emission Standards:

Designed to meet prevailing emission standards for the US and European markets during its production years. Manual will detail specific procedures for emissions control systems.