🏷️ Basic Information Identification Make: Jaguar Model: XJS Year: 1991 Generation Generation: Second Generation (XJS Facelift) Codes Chassis Code: XJ-S 👋 Introduction Market Position Market Segment: Luxury Grand Tourer Competitive Analysis Competitors 1991: BMW 8 Series, Mercedes-Benz SEC models, Porsche 928, Aston Martin Virage. Key Features V12 Engine: The iconic Jaguar 5.3L V12 HE (High Efficiency) engine remains a defining characteristic. Styling: Elegant and timeless coupe and convertible styling, penned by Malcolm Sayer and refined over years. Handling: Sophisticated independent rear suspension and well-balanced chassis provide excellent ride and handling for its class. Luxury Appointments: High-quality leather, wood trim, and advanced (for the era) features contribute to a luxurious interior. 📋 Manual Details Coverage Areas Language: English Manual Type: Service and Repair Manual Page Count Estimated Page Count: High (Comprehensive - specific count not provided in product info) Format Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Engine Mechanical: V12 Engine (5.3L HE - Jaguar AJ6/7/8 family precursor), including disassembly, assembly, inspection, and overhaul. Engine Management: Fuel Injection System (likely Lucas/Jaguar electronic fuel injection), Ignition System, Emissions Control Systems. Transmission: Automatic Transmission (likely ZF 4HP22/24), including operation, maintenance, and repair procedures. Brakes: Hydraulic Brake System, ABS (Anti-lock Braking System) if equipped, including component testing, bleeding, and repair. Suspension Steering: Front and Rear Suspension Systems, Power Steering System, including component replacement and alignment. Electrical System: Wiring Diagrams, Lighting System, Starting System, Charging System, Accessory Electricals, Instrument Panel. Cooling System: Radiator, Fan, Water Pump, Thermostat, Hoses, and Coolant specifications. Fuel System: Fuel Tank, Fuel Pump, Fuel Lines, Filters, and Injection System components. Exhaust System: Exhaust Manifolds, Catalytic Converters (if fitted), Mufflers, and Piping. Body And Chassis: Body Panel Repair, Door Mechanisms, Window Regulators, Interior Trim, Chassis Frame inspection and repair (limited). Procedures Included Maintenance: Scheduled maintenance procedures, fluid checks and changes, filter replacements, lubrication. Troubleshooting: Diagnostic charts and procedures for common problems, fault finding based on symptoms. Repair: Component removal, installation, adjustment, and overhaul for all major systems. Technical Specifications: Torque specifications, clearance measurements, tolerances, electrical specifications. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds, suitable for professional mechanics and experienced DIYers. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable (common for professional PDFs) Print Quality Diagram Quality: Top Quality Diagrams and Illustrations Text Clarity: Accurate, Clear, and Concise Text Binding Type Binding: Not Applicable (Digital PDF) Paper Type Paper: Not Applicable (Digital PDF - reusable without damage) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated V12 Displacement: 5.3 Liters (5343 cc) Bore X Stroke: 87.0 mm x 77.0 mm Compression Ratio: 9.5:1 (approximate for HE engines) Valvetrain: Overhead Valve (OHV), Pushrod actuated (though often referred to as OHC in historical context due to complex manifolding, it's fundamentally pushrod). Power Output: Approx. 260-270 bhp (194-201 kW) at 4750-5000 RPM (varies by market and emission controls). Torque Output: Approx. 320-330 lb-ft (434-447 Nm) at 3000-3250 RPM. Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), typically Lucas/Jaguar system. Fuel Type: Unleaded Premium (91 Octane or higher recommended). Ignition System Ignition Type: Electronic Ignition, often with twin distributors. 🔧 Transmission Standard Transmission Type: ZF 4HP22/24 4-Speed Automatic Optional Manual Transmission: Rarely fitted, but a 5-speed manual (Getrag) was an option on some earlier models, less common by 1991. Features Torque Converter Lockup: Yes, provides improved fuel economy at cruising speeds. Fluid Specifications Transmission Fluid Type: Dexron II (or equivalent specification for ZF 4HP22/24). Fluid Capacity Transmission Fluid Capacity: Approx. 10.5 liters (check manual for exact fill procedure). 📐 Dimensions Exterior Length: Approx. 4900 mm (192.9 in) Width: Approx. 1795 mm (70.7 in) Height: Approx. 1260 mm (49.6 in) Wheelbase: Approx. 2730 mm (107.5 in) Weights Curb Weight: Approx. 1800-1900 kg (3968-4189 lbs) depending on body style and equipment. 🛡️ Safety Features Ratings Crash Test Data: Limited official crash test data available for this era of vehicle compared to modern standards. Primarily relied on internal testing and design principles. Active Features ABS: Anti-lock Braking System (ABS) often standard or optional on 1991 models. Traction Control: Rarely fitted, not a common feature for this model year. Passive Features Airbags: Driver airbag typically standard on 1991 models, passenger airbag less common. Seat Belts: 3-point inertia-reel seat belts front and rear. 💡 Technology Features Infotainment Audio System: Premium sound system, often with cassette player and radio. CD players were becoming available as options or aftermarket. Driver Assistance Cruise Control: Electronic cruise control typically standard. Climate Control: Automatic climate control system for cabin temperature management. Connectivity Exterior Antennas: Power-retractable radio antenna. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000 miles or 6 months, whichever comes first (refer to manual for exact spec). Major Service Interval: Intervals for spark plug changes, coolant flush, and other major services vary; consult the manual. Fluid Specifications Engine Oil Type: API SG/SH,...