Positioning:
The Jaguar XJ6 of 1987 represented Jaguar's commitment to luxury and performance in the executive sedan segment. This era marked the transition to the XJ40 platform, bringing modern engineering and design while retaining classic Jaguar elegance.
Competitors:
Competed with other luxury sedans of the era such as the Mercedes-Benz W124, BMW 5 Series (E28/E34), and higher-trim models from brands like Audi and Volvo.
Distinctive Attributes:
Known for its refined ride quality, powerful inline-six engine, sophisticated styling, and premium interior appointments.
Benefits:
Empowers owners and independent mechanics with the knowledge to perform a wide range of maintenance and repair tasks, potentially saving significant costs and ensuring quality workmanship.
Engine Service:
In-depth coverage of the Jaguar AJ6 inline-six engine, including disassembly, assembly, overhaul, timing, cooling, lubrication, and troubleshooting.
Transmission Service:
Detailed procedures for the automatic transmission (likely ZF 4HP22 or similar), including fluid changes, filter replacement, hydraulic system diagnostics, and overhaul.
Brakes:
Comprehensive coverage of the hydraulic brake system, including ABS diagnostics (if equipped), brake fluid specifications, caliper overhaul, disc/pad replacement, and parking brake.
Electrical System:
Extensive coverage of the vehicle's electrical architecture, including battery, charging system, starting system, lighting, and accessory circuits.
Wiring Diagrams:
Detailed and clearly laid out electrical wiring diagrams for all major systems, facilitating troubleshooting and repair.
Suspension:
Procedures for servicing and repairing the independent front and rear suspension systems, including shock absorbers, springs, bushings, and alignment specifications.
Steering:
Details on the power steering system, including fluid, pump, rack and pinion, and tie rod end replacement and adjustment.
Cooling System:
Information on radiator, water pump, thermostat, hoses, and fan operation, including coolant specifications and flush procedures.
Fuel Injection Fuel System:
Diagnosis and repair of the electronic fuel injection (EFI) system, including fuel pump, injectors, fuel pressure regulator, and ECU (Engine Control Unit) troubleshooting.
Emission System:
Details on emission control components, including catalytic converter, oxygen sensors, and EGR system operation and testing.
Engine Control System:
In-depth look at the engine management system, including sensor testing, diagnostic codes, and ECU functionality.
Chassis Body:
Information on body panel removal/installation, structural components, interior trim, and basic bodywork procedures.
Restraint System:
Coverage of seat belts and any early airbag systems (if applicable to specific 1987 models), including inspection and potential replacement procedures.
Axle:
Details on the rear axle assembly, including differential service and axle shaft replacement.
General Maintenance:
Routine checks and services like oil changes, filter replacements, tire rotations, and fluid level checks.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and uncommon vehicle issues, often presented in a flowchart format.
Disassembly Assembly:
Step-by-step instructions for removing and reinstalling major components and sub-assemblies.
Repair Overhaul:
Detailed instructions for rebuilding and repairing worn or damaged components, from minor adjustments to full engine or transmission rebuilds.
Refurbish Renovate:
Guidance on restoring components to their original specifications and appearance.
Periodic Lubrication:
Specific lubrication points, types of lubricants, and recommended service intervals for all chassis and powertrain components.
Depth:
Comprehensive, ranging from basic owner maintenance to advanced mechanical and electrical diagnostics and repairs, suitable for professional technicians and dedicated enthusiasts.
Oil Change:
Typically every 5,000 - 7,500 miles or 6-12 months, depending on driving conditions. Consult manual for exact interval for the 3.6L AJ6.
Transmission Fluid Change:
Recommended every 30,000 - 50,000 miles or as per manual specification. It's crucial to use the correct fluid type (e.g., Dexron II).
Spark Plugs:
Intervals vary, but typically around 20,000 - 30,000 miles for conventional plugs of that era. The manual will specify the exact type and gap.
Engine Oil:
API SG or SH specification, SAE 10W-40 or 20W-50 depending on ambient temperature. Capacity approx. 5.5 - 6.0 liters.
Coolant:
Ethylene glycol-based coolant with corrosion inhibitors. Typically a 50/50 mix with distilled water. Capacity approx. 10 liters.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Electrical Gremlins:
Jaguar of this era is known for electrical gremlins. Poor grounding, faulty relays, and aging wiring harnesses can cause intermittent issues with lights, instruments, and ECU communication.
Suspension Bushings:
Wear in suspension bushings (especially control arm bushings) can lead to imprecise handling and premature tire wear.
Cylinder Head Gasket:
While the AJ6 is generally robust, the cylinder head gasket can be a potential failure point, particularly if the cooling system has not been properly maintained.
Rust:
As with many cars of this vintage, rust can be an issue, especially in common areas like wheel arches, sills, and around the windows. Thorough inspection is recommended.
