Positioning:
Targeted at owners and independent repair facilities seeking detailed technical information for a classic British luxury grand tourer.
Value Proposition:
Provides a cost-effective alternative to expensive factory paper manuals and specialized diagnostic software for servicing and repairing the 1991 XJS.
Feature Set:
Hundreds of pages, detailed repair/maintenance procedures, part layouts, wiring schematics, part numbers, comprehensive coverage.
Overall Coverage:
Comprehensive Service and Repair for all 1991 Jaguar XJS models.
Estimated Page Count:
Undisclosed, described as 'hundreds of pages'.
Type:
Service and Repair Manual
Format:
Digital (Multiple PDF sections)
Powertrain:
Engine mechanical, fuel system, ignition system, cooling system, exhaust system, transmission (automatic), drivetrain components.
Chassis:
Suspension (front and rear), steering system, braking system (hydraulic and mechanical components), wheels and tires.
Electrical:
Complete wiring diagrams, lighting systems, starting and charging systems, instrumentation, accessories, diagnostic procedures.
Body:
Body panels, trim, interior components, glass, climate control system.
Maintenance:
Scheduled maintenance, fluid changes, filter replacements, lubrication, inspection routines.
Repair:
Detailed step-by-step repair procedures for all major components, including engine overhaul, transmission service, brake caliper replacement, and electrical component repair.
Diagnostics:
Troubleshooting guides, diagnostic flowcharts, symptom-based problem solving.
Technical Data:
Specifications, tolerances, torque values, clearances, test procedures.
Depth:
Extensive, covering everything from basic owner maintenance to complex engine and transmission rebuilds, suitable for professional mechanics and advanced DIY enthusiasts.
Format:
PDF (Over 70 separate sections)
Quality:
Printable, allowing users to print specific pages as needed.
Binding:
N/A (Digital format, printable)
Paper Type:
N/A (Digital format, user-printable)
Engine Type:
V12, naturally aspirated
Engine Code:
Jaguar AJ6 5.3L V12 (later variants like HE - High Efficiency)
Displacement:
5.3 liters (5343 cc)
Horsepower:
Approx. 270-295 hp (SAE Net) depending on market and specific tune.
Torque:
Approx. 317-330 lb-ft (SAE Net) depending on market and specific tune.
Fuel Delivery:
Bosch L-Jetronic fuel injection (likely the 5.3L HE variant common in '91).
Fuel Type:
Unleaded Premium Gasoline
ECU Type:
Bosch electronic engine control unit (ECU)
Block Material:
Cast Iron
Head Material:
Aluminum Alloy
Type:
Pressurized liquid cooling system
Transmission Type:
ZF 4HP22 EH 4-speed automatic transmission
Optional Transmission:
Manual transmission was largely phased out for the V12 by this era, primarily automatic.
Transmission Control:
Electronic control (EH - Elektronische Hydraulik) for smoother shifts and adaptive programming.
Transmission Fluid Type:
Typically DEXRON-II or equivalent automatic transmission fluid (ATF), specific part numbers would be in the manual.
Wheelbase:
Approx. 102.7 inches (2609 mm)
Length:
Approx. 195.2 inches (4958 mm)
Width:
Approx. 70.1 inches (1780 mm)
Height:
Approx. 50.0 inches (1270 mm)
Curb Weight:
Approx. 3,900 - 4,200 lbs (1769 - 1905 kg), varying by coupe/convertible and options.
Gross Vehicle Weight Rating:
Information typically found in manual or vehicle placard.
Trunk Capacity:
Limited due to styling and V12 packaging, specific volume not readily available but modest.
Crash Test Data:
While official NHTSA/IIHS ratings for this era are scarce, the XJS featured a robust body structure for its time.
Braking System:
4-wheel anti-lock braking system (ABS) standard.
Steering:
Power assisted rack and pinion.
Restraints:
Seat belts (likely inertia reel, 3-point front), possibly early driver airbag depending on market/options (though less common on '91 V12s).
Body Structure:
Reinforced passenger cell, crumple zones.
Audio System:
Likely a premium factory-installed AM/FM stereo with cassette player, possibly with amplifier. Features would be basic by modern standards.
Cruise Control:
Standard feature on most models.
System Type:
Automatic climate control system, potentially with air conditioning and heater core service.
Headlights:
Rectangular halogen headlights, typically with manual leveling adjustment.
Oil Change:
Typically every 6,000 miles or 6 months, but the manual will specify exact interval and oil type.
Major Service:
Detailed intervals for spark plug replacement, timing chain checks, cooling system flushes, and transmission service will be outlined.
Engine Oil Type:
Likely a 20W-50 or 10W-40 synthetic or semi-synthetic oil, manual will confirm specific API/ACEA ratings and capacity.
Coolant Type:
Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Manual will specify Jaguar part number or equivalent.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid, manual will specify.
Common Problems V12:
Overheating due to cooling system complexity, fuel system component aging (injectors, pumps), distributor and ignition module issues, gearbox oil leaks, wiring harness degradation, rust in sills and wheel arches.
Common Problems General:
Electrical gremlins are common in many cars of this era, particularly with complex systems. Upholstery and trim wear.
Oil Filter Part Number:
Part numbers are specific and would be detailed within the manual (e.g., Fram PH2 or equivalent).
Air Filter Part Number:
Part numbers are specific and would be detailed within the manual (e.g., AC-Delco A267C or equivalent).
Manufacturer:
Jaguar Cars, a historic British marque renowned for luxury, performance, and elegant design.
Development:
Evolved from the iconic E-Type, launched in 1975. The 1991 model represents a significantly updated version with fuel injection, improved aerodynamics, and modernizations over its early iterations.
Production Period:
1975-1996. The 1991 model falls within the later 'facelifted' or Series III era, with significant mechanical updates post-1987.
Manufacturing Location:
Coventry, England
Period Awards:
While specific awards for the '91 model year are not commonly cited, the XJS consistently received praise for its styling and V12 engine performance in automotive press during its production run.
Automotive Press Reviews:
Often lauded as a comfortable GT car with effortless V12 power, though sometimes criticized for serviceability and reliability compared to German rivals.
