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Jaguar Xjs

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The Jaguar XJS: A Comprehensive Guide

The Jaguar XJS, produced from 1975 to 1996, occupies a unique space in Jaguar's history. Conceived as a successor to the legendary E-Type, it evolved into a grand tourer that prioritized comfort, refinement, and effortless performance over outright sporting prowess. While initially met with mixed reactions, the XJS has matured into a highly desirable classic, appreciated for its distinctive styling, luxurious interior, and the potent Jaguar V12 engine (in certain models). It represents a luxurious and elegant British motoring experience from a bygone era.

Generations of the XJS

  • Series I (1975-1981): The original XJS, initially only available with the 5.3-liter V12 engine. Notable features included distinctive flying buttresses behind the side windows, inboard rear brakes, and a luxurious interior. Early examples had issues with fuel economy and cooling.
  • Series II (1981-1991): Substantial improvements were made. The high-compression 'Fireball' combustion chamber was introduced to the V12 engine, improving fuel efficiency significantly. Interior trim was updated, and the car received some external cosmetic changes including chrome bumpers and improved cooling. In 1983, the 3.6-liter AJ6 inline-six engine became available, offering a more economical alternative to the V12.
  • Series III (1991-1996): The most visually distinct update. Significant exterior restyling by Geoff Lawson resulted in more contemporary lines, including wrap-around rear lights and redesigned bumpers. The interior also received a complete overhaul. The 4.0-liter AJ6 engine, later upgraded to the 4.0-liter AJ16, replaced the earlier 3.6. The 6.0-liter V12 replaced the 5.3. Electronic fuel injection systems were upgraded throughout the production run.

Reliability & Common Issues

While the XJS offers a rewarding ownership experience, prospective buyers should be aware of potential problem areas. Thorough inspection and preventative maintenance are crucial.

V12 Engine Issues:

  • Cooling System: Overheating is the V12's biggest enemy. Ensure the cooling system is in perfect working order. Check for leaks in the radiator, hoses, water pump, and thermostat housing. Radiator recoring is often necessary on older models. The viscous fan coupling is another common failure point.
  • Fuel System: The complex Lucas fuel injection system can be problematic. Fuel leaks are common, particularly from fuel lines and injectors. Check for rough running, poor idle, and fuel smells.
  • Electrical Issues: The XJS is known for electrical gremlins. Check all electrical systems, including the lights, windows, seats, and gauges. Poor grounds can cause many problems.
  • Oil Leaks: V12s tend to leak oil as they age, particularly from the rear main seal and valve covers.

AJ6 & AJ16 Inline-Six Engine Issues:

  • Timing Chain Tensioner: The plastic timing chain tensioner is a known weak point and should be replaced with an upgraded metal unit.
  • Cooling System: Similar to the V12, cooling system issues can arise. Check the radiator, hoses, and water pump.
  • Oil Leaks: Valve cover gaskets and the front crankshaft seal are common sources of oil leaks.

General Issues:

  • Rust: Check for rust, especially around the wheel arches, sills, floors, and around the windscreen.
  • Suspension: The independent rear suspension (IRS) can be expensive to repair. Check for worn bushings, leaking shocks, and unusual noises.
  • Brakes: The inboard rear brakes on early models can be difficult and expensive to service. Ensure the brakes are in good working order.
  • Interior: Check for wear and tear on the leather upholstery, wood trim, and carpets. Water leaks can damage the interior.
  • Transmission: Both the automatic and manual transmissions are generally reliable, but check for smooth shifting and any signs of slippage.

Driving Experience

The driving experience of an XJS is characterized by its smooth ride, comfortable interior, and effortless performance. It's a grand tourer, designed for long-distance cruising in style.

Pros:

  • Smooth Ride: The XJS offers a very comfortable and compliant ride, absorbing bumps and imperfections in the road.
  • Luxurious Interior: The interior is well-appointed with leather upholstery, wood trim, and comfortable seats.
  • Effortless Performance: The V12 engine provides effortless power and acceleration, while the inline-six engines offer a more balanced and economical driving experience.
  • Distinctive Styling: The XJS has a unique and recognizable design that stands out from the crowd.
  • Relatively Affordable Classic: Compared to other classic Jaguars, the XJS is relatively affordable to purchase.

Cons:

  • Fuel Economy: The V12 engine is notoriously thirsty, especially on earlier models.
  • Reliability Issues: The XJS can be prone to reliability issues, particularly with the electrical and fuel systems.
  • Running Costs: Parts and labor can be expensive, especially for the V12 engine and complex systems.
  • Size: The XJS is a large car, which can make it difficult to maneuver in tight spaces.
  • Weight: The car is heavy, which can affect its handling and braking performance.

Buying Advice

When buying an XJS, consider the following:

  • Later Models (1991-1996): The Series III models, particularly those with the 4.0-liter AJ16 engine or the 6.0-liter V12, are generally considered to be the most reliable and desirable. The redesigned exterior and updated interior make them more appealing to many buyers.
  • Condition is Key: Prioritize a car that has been well-maintained and cared for. A thorough inspection by a qualified mechanic is essential.
  • Check the Service History: Look for evidence of regular servicing and maintenance. Pay close attention to the cooling system, fuel system, and electrical systems.
  • Consider the Engine: The V12 offers effortless performance but is more expensive to maintain. The inline-six engines are more economical and easier to work on.
  • Inspect for Rust: Rust is a major concern, so thoroughly inspect the bodywork, undercarriage, and suspension components.
  • Factor in Running Costs: Be prepared for higher running costs compared to modern cars. Parts and labor can be expensive, and fuel economy is not a strong point.
  • Don't be Afraid to Walk Away: If you find any major issues during the inspection, don't be afraid to walk away. There are plenty of other XJSs out there.
  • Professional Inspection: A pre-purchase inspection by a Jaguar specialist is money well spent. They will be able to identify potential problems that you might miss.

By following these tips, you can find a well-maintained XJS that will provide years of enjoyable motoring.

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