Target Audience:
Jaguar XJ40 owners, independent repair shops, automotive enthusiasts
Value Proposition:
Empowers owners to perform professional-level maintenance and repairs, saving time and money.
Differentiation:
Official factory documentation, providing precision and accuracy far beyond generic guides.
Content Highlight:
Step-by-step instructions, diagrams, illustrations, wiring schematics, specifications
Practicality:
Printable pages for workshop use, digital format for easy storage and access.
Primary Coverage:
All XJ40 models
Repair Scope:
A-Z repairs, maintenance, diagnostics
Estimated Page Count:
Extensive (specific count not provided, but described as 'complete')
Type:
Service and Repair Manual
Source:
Factory Technician Manual
Primary Language:
English
Powertrain:
Engine, Fuel Service, Emission Control, Intake/Exhaust/Cooling, Lube, Ignition, Starting, Charging, Auto Transmission, Manual Transmission, Transfer Propeller Shaft, Drive Shaft, Differential, Axle
Chassis:
Suspension, Tire & Wheel, Brake Control, Brake, Parking Brake, Steering Column, Power Steering
Electrical:
Electrical System, Wiring Schematics, Multiplex/CAN Communication
Comfort And Convenience:
Air Conditioning, Supplemental Restraint System (SRS), Seat Belt, Engine Immobilizer, Cruise Control, Wiper & Washer, Door Lock, Meter/Audio/Visual, Horn, Windshield/Glass/Mirror, Instrument Panel
Body:
Seat, Engine Hood/Door, Exterior & Interior Trim
Maintenance:
Routine checks, fluid changes, filter replacements, lubrication
Diagnostics:
Troubleshooting guides, fault code interpretation (where applicable to the era)
Repair:
Step-by-step repair instructions for all major and minor components
Adjustment:
Component adjustments and calibrations
Overhaul:
Engine and transmission overhaul procedures
Depth:
Comprehensive: From basic maintenance to advanced diagnostics and full rebuilds
Content Type:
Vehicle-specific, not generic
Compatibility:
Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac
Software Requirements:
Adobe PDF Reader, Winzip (free)
Printability:
Fully printable, with option to enlarge images
Binding:
N/A (Digital PDF)
Paper Quality:
N/A (Digital PDF)
Navigation:
Single PDF for easy access, no page flipping
Engine Type 1981:
3.6L AJ6 Inline-6 (EFI)
Horsepower 1981 3.6L:
Approx. 225 bhp (at 5500 rpm, depending on specific market tune)
Torque 1981 3.6L:
Approx. 270 lb-ft (at 4000 rpm, depending on specific market tune)
Fuel Delivery:
Electronic Fuel Injection (EFI), Bosch LH-Jetronic or similar
Bore Stroke 3.6L:
91 mm x 92 mm
Compression Ratio 3.6L:
9.0:1 (typical)
Engine Oil Type Recommendation:
API SF or SG, SAE 10W-30 or 10W-40 (refer to manual for precise viscosity based on temperature)
Engine Oil Capacity 3.6L:
Approx. 6.5 liters (with filter)
Transmission 1981 Standard:
ZF 4HP22 Automatic Transmission
Transmission 1981 Optional:
TWR Manual Transmission (less common, specific availability for 1981 model year needs verification via VIN)
Automatic Transmission Features:
Four-speed, electronic control (in later versions of XJ40, early models may have hydraulic control)
Automatic Transmission Fluid:
Dexron III or Mercon (or equivalent specification as per manual)
Automatic Transmission Fluid Capacity:
Approx. 8.5 liters (total fill)
Wheelbase Xj40:
2870 mm (113 inches)
Length Xj40:
4965 mm (195.5 inches)
Width Xj40:
1790 mm (70.5 inches)
Height Xj40:
1370 mm (53.9 inches)
Curb Weight Xj40 3.6L:
Approx. 1700 kg (3750 lbs)
Gross Vehicle Weight Rating Xj40:
Typically around 2200 kg (4850 lbs)
Wheel Size Standard 1981:
15-inch alloy wheels
Tire Size Standard 1981:
205/70 VR 15 or similar (check manual for exact fitment)
Wheelbolt Pattern:
5 x 120.65 mm (5 x 4.75 inches)
Safety Ratings Era:
N/A (Modern standardized crash testing not prevalent for 1981 models)
Braking System:
Four-wheel Anti-lock Braking System (ABS)
Steering:
Power-assisted rack and pinion steering
Occupant Restraint:
Front seat belts, reinforced passenger cell
Audio System:
Factory fitted stereo system (e.g., Clarion, Nakamichi in later models), often with cassette player. Manual covers head unit, speakers, and wiring.
ABS:
Four-wheel ABS system, described in detail in the manual.
Wiring Schematics:
Comprehensive wiring diagrams for all electrical systems, including engine management, lighting, and accessories.
Air Conditioning System:
Manual covers operation, maintenance, and repair of the A/C system.
Oil Change Interval:
Every 5,000 miles or 6 months (typical for the era, consult manual for precise schedule)
Filter Replacement Interval:
Oil filter with every oil change, air filter every 12,000-15,000 miles, fuel filter every 24,000 miles (typical)
Transmission Service Interval:
Every 24,000-30,000 miles or 24 months (fluid and filter change)
Coolant Type:
Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. (Consult manual for specific Jaguar specification).
Brake Fluid Type:
DOT 3 or DOT 4 (check manual for exact specification)
Common Xb Problems Era:
Electrical gremlins ( Lucas systems ), rust corrosion (especially around wheel arches and sills), cooling system leaks, suspension bush wear, gearbox issues (ZF 4HP22).
Specific Engine Issues:
AJ6 engine can be sensitive to oil quality and maintenance; potential for timing chain wear if neglected.
Part Numbers:
Manual contains specific part numbers for all components.
Jaguar Philosophy:
Luxury, performance, refinement, distinctive styling
Xj40 Introduction:
Introduced in 1986 (Note: The manual is for a 1981 XJ, indicating it may cover the preceding XJ-S or Series III XJ models which precede the XJ40. The prompt specifies '1981 Jaguar XJ (XJ40)' which is a discrepancy, as XJ40 started in 1986. Assuming the manual covers the 'Jaguar XJ' range for 1981, likely the Series III).
Xj Series Iii Introduction:
The Series III XJ was produced from 1979 to 1992. The 1981 model would fall within this generation.
Production Location:
Coventry, England
Production Years Series Iii
Production Years:
1979-1992
