Positioning:
High-performance, low-volume exotic sports car.
Competitors:
Ferrari 308/328, Porsche 911, Lamborghini Jalpa, Aston Martin V8 Vantage.
Design Philosophy:
Mid-engined, rear-wheel-drive, fiberglass monocoque chassis, distinctive wedge styling.
Manual Value Proposition:
Provides comprehensive, accurate, and easy-to-follow repair and maintenance information essential for preserving the performance and value of a classic Lotus Esprit.
Target Audience:
Do-it-yourself enthusiasts, independent workshops, and professional mechanics.
Engine Mechanical:
Complete overhaul, disassembly, assembly, diagnostics, tuning, lubrication, cooling system, fuel system (carburetor or early injection depending on specific build date within the range), exhaust system.
Engine Electrical:
Ignition system, starter, alternator, wiring diagrams, ECU diagnostics (if applicable), sensors, emissions control systems.
Transmission Manual:
Overhaul, removal, installation, clutch system, gearbox internals, maintenance.
Chassis Suspension:
Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications, geometry.
Brakes:
Disc brake systems (front and rear), hydraulic lines, master cylinder, calipers, bleeding procedures, parking brake.
Steering:
Steering rack, tie rods, steering column, power steering system (if equipped).
Electrical System:
Lighting, instrumentation, power windows, door locks, wipers, horn, battery, fuses, relays, wiring harness repair.
Body And Trim:
Body panel removal/installation, interior trim, doors, windows, bumpers, aerodynamics, glass replacement.
Fuel System:
Fuel tank, fuel lines, fuel pump, fuel filters, carburetor identification and adjustment (for carbureted models), early fuel injection system troubleshooting (for fuel injected models).
Cooling System:
Radiator, coolant hoses, water pump, thermostat, fan operation, coolant specifications and capacity.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement.
Troubleshooting:
Diagnostic flowcharts, common fault identification, symptom-based repair guides.
Repair:
Step-by-step instructions for component removal, overhaul, and reinstallation for all covered systems.
Rebuilds:
Detailed procedures for engine and transmission rebuilds, including specifications and tolerances.
Diagnostics:
In-depth diagnostic procedures for mechanical, electrical, and fuel systems.
Depth:
Comprehensive (covers complete disassembly and rebuilds).
Detail Level:
Highly detailed, with exploded diagrams and step-by-step instructions.
Engine Type:
Inline-4 Cylinder, DOHC, Turbocharged (most common for S3 in this range).
Engine Code Range:
Lotus 900 series engine family (e.g., Type 910 for turbocharged).
Displacement:
2.2 Liters (2174 cc)
Horsepower:
Approx. 215-220 bhp (for turbocharged S3 variants).
Torque:
Approx. 210-220 lb-ft (for turbocharged S3 variants).
Fuel Delivery:
Early models might feature Dellorto carburetors, later models (within the 1980-1987 range) could have fuel injection (e.g., Bosch L-Jetronic or similar).
Cooling Type:
Liquid-cooled
Oil Type Specification:
Typically SAE 10W-40 or 20W-50, API SG or equivalent. Specific recommendations in manual.
Ignition System:
Electronic Ignition, Distributor-based or early electronic ignition control.
Oil Change Interval:
Typically every 3,000-5,000 miles (4,800-8,000 km) or annually, whichever comes first. Manual will specify precise interval.
Timing Belt Replacement:
Crucial for these engines. Interval varies, often around 30,000-45,000 miles (48,000-72,000 km) or 4-5 years. Manual is definitive.
Spark Plug Replacement:
Typically every 15,000-30,000 miles (24,000-48,000 km), depending on plug type and wear.
Coolant Type:
Ethylene glycol-based antifreeze. Specific mix ratio and type (e.g., OAT, HOAT) to be confirmed in manual.
Brake Fluid Type:
DOT 3 or DOT 4, typically. Manual will specify the correct type and change interval.
Common Wear Items:
Clutch, suspension bushings, gearbox synchromesh, cooling system hoses and radiator, electrical connections, interior trim degradation due to age.
Turbocharger Maintenance:
Requires specific warm-up and cool-down procedures to prolong turbo life. Oil feed line and drain can become restricted.
Fiberglass Body:
Gelcoat crazing, minor impact damage repair, adhesion issues if not properly prepped.
Founder:
Anthony Colin Bruce Chapman (Lotus Cars)
Philosophy:
Lightweight, agility, 'add lightness'.
Predecessor:
Lotus Esprit (Series 1, 2, 2.2)
Successor:
Lotus Esprit (subsequent generations with more advanced styling and engines).
Production Years Covered:
1980-1987
Manufacturing Location:
Lotus Cars factory, Hethel, Norfolk, England.
Notable Changes Within Range:
Introduction of turbocharged engines, styling updates, potential for early fuel injection.