🏷️ Basic Information Identification Make: Ford Model: Sierra RS Cosworth Years Covered: 1986, 1987, 1988, 1989, 1990, 1991, 1992 Codes Engine Code Primary: YBG Chassis Code: GBC (3-door hatchback), GDF (Sapphire 4-door sedan) 👋 Introduction Market Position Positioning: The Ford Sierra RS Cosworth was a homologation special, designed to compete in Group A touring car racing. It was positioned as a high-performance, driver-focused sports sedan, targeting enthusiasts and those seeking motorsport pedigree. Competitive Analysis Competitors: BMW M3 E30, Mercedes-Benz 190E 2.3-16 Cosworth, Opel Kadett GSi, Audi Quattro. Key Features Performance Focus: The RS Cosworth was renowned for its aggressive styling, powerful turbocharged engine, advanced chassis dynamics, and motorsport heritage. Manual Value Proposition: This manual provides essential technical data and step-by-step procedures required for the proper maintenance, repair, and restoration of this iconic performance vehicle, enabling owners to keep their RS Cosworth in optimal condition. 📋 Manual Details Coverage Areas General Coverage: Comprehensive repair, maintenance, diagnostics, troubleshooting, and technical data for the Ford Sierra RS Cosworth. Page Count Total Pages: 1200+ Manual Type Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: 2.0L I4 DOHC (Cosworth YBG), Turbocharging System, Fuel Injection System (Bosch Motronic), Ignition System, Cooling System, Lubrication System. Drivetrain: 5-speed Manual Transmission (MT75), Limited Slip Differential (LSD), Clutch System, Driveshafts, Rear Axle. Suspension Steering: Front Independent Suspension (MacPherson Struts), Rear Independent Suspension (Multi-link), Power Assisted Steering System. Brakes: Front Ventilated Disc Brakes, Rear Disc Brakes, Anti-lock Braking System (ABS) - where equipped. Electrical Electronics: Battery, Charging System, Starting System, Lighting System, Ignition System, Instrumentation, Engine Control Unit (ECU), Wiring Diagrams, Fuses and Relays. Body Chassis: Body Construction, Exterior Panels, Doors, Hood, Trunk, Bumpers, Interior Trim, Seat Removal and Installation, Glass Replacement. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement. Repair: Engine overhaul, transmission repair, brake system service, suspension component replacement, electrical system diagnostics and repair, body panel repair. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable), symptom-based troubleshooting. Disassembly Assembly: Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation. Specifications: Torque specifications for all fasteners, fluid capacities, wear limits, adjustment procedures, critical measurements. Technical Depth Depth: From basic routine maintenance to complete engine and drivetrain rebuilds, including advanced diagnostics and component-level repair. 📊 Manual Specifications File Format Quality: High-resolution PDF, ensuring clarity of text and diagrams. Print Quality Printability: Fully printable, allowing users to create physical copies of sections or the entire manual. Binding Type Digital Binding: N/A (Digital Download) Paper Type Digital Paper Type: N/A (Digital Download) Software Requirement Required Software: Adobe Reader or compatible PDF viewer. Compatibility Operating Systems: Windows, macOS, Linux ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, turbocharged, DOHC (Dual Overhead Camshaft) Displacement: 1993 cc (2.0 Liters) Bore X Stroke: 90.8 mm x 77.0 mm Compression Ratio: 8.0:1 Valve Train: 4 valves per cylinder, belt-driven DOHC Performance Horsepower Ps: 204 PS (150 kW; 201 hp) at 6000 rpm Torque Lb-Ft: 214 lb-ft (290 Nm) at 3500 rpm Redline Rpm: 6500 RPM Fuel System Induction: Bosch L-Jetronic fuel injection with Garrett T03 turbocharger and intercooler. Fuel Type: Unleaded Premium (95 RON minimum recommended) Fuel Pump Pressure: Typically 3.0-3.5 bar (43.5-50.8 psi), refer to manual for exact specification. 🔧 Transmission Standard Type: Getrag MT75 5-speed manual transaxle. Optional Type: N/A (Only Manual Transmission was offered) Features Drivetrain: Rear-Wheel Drive (RWD) Differential: Limited Slip Differential (LSD) as standard. Clutch: Hydraulically operated single-plate dry clutch. 📐 Dimensions Exterior Length: 4420 mm (174.0 in) for 3-door hatchback, 4488 mm (176.7 in) for Sapphire sedan. Width: 1705 mm (67.1 in) Height: 1380 mm (54.3 in) for 3-door hatchback, 1375 mm (54.1 in) for Sapphire sedan. Wheelbase: 2600 mm (102.4 in) Weights Curb Weight Kg: Approximately 1270-1300 kg (2800-2866 lbs) depending on body style and equipment. Gross Vehicle Weight Rating: Refer to manual for specific GVWR, typically around 1700 kg. 🛡️ Safety Features Ratings Era Safety Standards: Met contemporary European safety standards for its time; advanced for its class. Active Features ABS: Anti-lock Braking System (ABS) available as an option on some models, standard on later Sapphire variants. Limited Slip Differential: Standard LSD enhances traction and stability during acceleration and cornering. Passive Features Seatbelts: Three-point inertia-reel seatbelts for front occupants, lap belts for rear occupants. Body Structure: Reinforced safety cage, energy-absorbing crumple zones. 💡 Technology Features Infotainment Audio System: Typically featured a Ford radio/cassette player, often with optional amplifier and uprated speakers. Aftermarket head units are common upgrades. Instrumentation: Comprehensive analogue gauges including tachometer, speedometer, oil pressure, oil temperature, boost gauge, and fuel level. Driver Assistance ABS: Optional or standard on later models, providing enhanced braking control. Power Steering: Hydraulic power-assisted steering for improved maneuverability. Connectivity Modern Connectivity: None from...