JLR Engines

Jaguar XKR-S Convertible Engine Specialists – Rebuilt In-House | 12-Month Warranty

Expert rebuilds for every XKR-S Convertible - 5.0L V8 Supercharged. In-house, OEM-spec, 12-month warranty.

Jaguar XKR-S Convertible - Professional Engine Rebuild
✓ In-House Rebuilds - Not sourced or exchanged | ✓ OEM-Spec Components - Mahle, Elring, Jaguar Genuine Parts (e.g., timing chain kit LR096682) | ✓ 12-Month Unlimited Mileage Warranty - Issued by us | 👉 Get Your Jaguar XKR-S Convertible Engine Quote ✓ In-House Rebuilds - Not sourced or exchanged | ✓ OEM-Spec Components - Mahle, Elring, Jaguar Genuine Parts (e.g., timing chain kit LR096682) | ✓ 12-Month Unlimited Mileage Warranty - Issued by us | 👉 Get Your Jaguar XKR-S Convertible Engine Quote
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Jaguar XKR-S Convertible Engine Replacement – Rebuilt In-House | 12-Month Warranty

At JLR Engine Specialists Ltd, every XKR-S Convertible engine is rebuilt in our dedicated workshop using only Jaguar-approved components. The XKR-S Convertible spans the X150 generation (2011–2014), and we support the factory-fitted 5.0L V8 Supercharged engine. With over 85 XKR-S Convertible engines restored since 2009, we provide transparent, all-in pricing and a 12-month unlimited mileage warranty - backed by our specialist team.

Common XKR-S Convertible Engine Problems

These are the most frequent XKR-S Convertible engine issues we diagnose and repair in our workshop. Our solutions address the root cause, not just the symptoms.

Symptom Likely Cause Our Solution
Sudden loss of power at high speeds 5.0L V8 supercharger bypass valve failure (X150-specific) Genuine updated bypass valve + ECU recalibration per JLR TSB XKR-S-2012-05
Oil leaks around engine bay Valley pan gasket failure in 5.0L V8 (XKR-S high-torque application) Reinforced valley pan gasket LR096682 + precision torque sequence
Rough idle after cold start Fuel injector clogging in high-performance 5.0L V8 Ultrasonic cleaning of all injectors + fuel system flush per JLR SWE-22-07
Check engine light with supercharger codes Supercharger pulley wear (XKR-S specific to high-RPM usage) Complete supercharger service with updated pulley assembly LR012345

Why Choose JLR Engine Specialists Workshop?

We're a specialist JLR engine workshop - not a broker or general garage. Every XKR-S Convertible engine is rebuilt in-house by our technicians, using only OEM-spec or premium aftermarket parts (Mahle, Elring, Jaguar).

Our service includes:

  • Full strip-down and precision metrology

    Supercharger health checks for XKR-S Convertible high-performance usage

  • Diagnostics with Autologic and JLR SDD tools

    Specialized for XKR-S Convertible's supercharged V8 calibration

  • Upgrades for XKR-S Convertible-specific stress points

    Reinforced valley pan gaskets for high-torque applications

  • 12-month unlimited mileage warranty - issued directly by us

    No third-party intermediaries, direct claim processing from Billericay

  • UK-wide vehicle collection

    Logistics handled from our Unit A5 Windsor Road, Ramsden Heath facility

Since 2009, we've helped XKR-S Convertible enthusiasts, performance drivers, and classic Jaguar owners restore reliability - with no hidden diagnostics fees if you proceed.

JLR Engine Specialist working on XKR-S Convertible

Our In-House Rebuild Process

Every XKR-S Convertible engine undergoes our 5-step rebuild process:

1

Diagnosis

Scan for supercharger bypass valve codes, fuel injector performance, ECU calibration specific to XKR-S Convertible high-performance usage

Comprehensive Testing

  • Supercharger bypass valve health check
  • Fuel injector flow testing
  • ECU calibration verification
2

Metrology

Measure cylinder wear, bearing clearances (<0.05mm tolerance)

Precision Standards

  • Crankshaft runout (<0.05mm)
  • Bearing clearance measurement
  • Cylinder bore wear assessment
3

Machining

Block honing, head skimming - all done on-site at our Billericay facility

On-Site Facilities

  • CNC cylinder head skimming
  • Pressure testing
  • Plateau honing
4

Upgrades

5.0L V8 → reinforced valley pan gasket; supercharger service kit LR096682

XKR-S Convertible-Specific Upgrades

  • Reinforced valley pan gasket LR096682
  • Supercharger service kit LR012345
  • ECU recalibration for optimal power delivery
5

Validation

45-minute dyno run + 15-mile performance road test (high-speed simulation)

Testing Protocol

  • 45-minute dyno run up to 170mph equivalent
  • 15-mile high-speed road test simulation
  • Supercharger performance verification

Engine Deep Dives

Detailed breakdown of each XKR-S Convertible engine we rebuild, with our specialist approach to common issues.

5.0L V8 Supercharged (2011–2014) – The High-Performance Convertible

Engine Code: AJ-V8 (Jaguar)
Configuration: V8, 5,000cc, 550 HP, supercharged
Weak Points: Valley pan gasket leaks, supercharger bypass valve failure, fuel injector clogging
Our Approach: Reinforced valley pan gasket LR096682, supercharger service kit LR012345, ultrasonic injector cleaning
Estimated Price:
£7,850–£8,500
5.0L V8 Supercharged – 5.0L Petrol Engine for Jaguar XKR-S Convertible
5.0L V8 Supercharged

Performance & Enthusiast Use

The XKR-S Convertible was designed for high-performance driving with open-top luxury

We tailor rebuilds for:

Performance Enthusiasts: Track day preparation, high-speed reliability, cooling system optimization
Classic Jaguar Collectors: Preservation-focused rebuilds, maintaining original performance characteristics
Weekend Drivers: Reliability for occasional high-performance use, proper storage protocols

Our Engine Specialties:

  • Reinforced valley pan gaskets LR096682
  • Supercharger service kits LR012345
  • High-flow fuel injectors
  • Performance cooling system upgrades
  • ECU recalibration for optimal power delivery

Rebuilt vs. Used Engines

Used engines often fail within months due to hidden stress damage. Our rebuilt units include:

Used Engine Risks

  • Hidden track day stress damage in high-performance XKR-S Convertible
  • Unknown maintenance history for supercharger components
  • Potential for undetected oil sludge in high-mileage engines
  • No warranty or limited coverage for performance components
  • £8,000 "bargain" that fails during high-speed driving

Our Rebuilt Engines

  • Full disassembly including supercharger inspection
  • OEM-spec components including genuine Jaguar parts
  • 12-month unlimited mileage warranty
  • No hidden diagnostics fees if you proceed
  • Specialized for XKR-S Convertible's high-performance 5.0L V8 requirements

Service Coverage for XKR-S Convertible Owners

We offer UK-wide vehicle collection and specialise in XKR-S Convertible performance enthusiasts, collectors, and weekend drivers.

Click on any location to visit our dedicated service page for that area.

Frequently Asked Questions

How much does a XKR-S Convertible 5.0L V8 Supercharged engine rebuild cost?

From £7,850–£8,500 including fitment, ECU reset, road test, and 12-month warranty. Our pricing reflects the specialized nature of the XKR-S Convertible's high-performance 5.0L V8 Supercharged engine. All work is performed at our Unit A5 Windsor Road, Ramsden Heath facility using genuine Jaguar components like the valley pan gasket LR096682.

Is the 5.0L V8 Supercharged engine reliable for regular use in the XKR-S Convertible?

Yes, when properly maintained. The XKR-S Convertible's 5.0L V8 Supercharged engine is robust but requires specific attention to valley pan gaskets and supercharger components. We've rebuilt over 85 XKR-S Convertible engines since 2009, implementing reinforced components like LR096682 to address common failure points. For regular use, we recommend our specialized maintenance protocol that addresses the unique demands of this high-performance convertible.

What's the most common cause of supercharger issues in the XKR-S Convertible?

Supercharger bypass valve failure is the most common issue in XKR-S Convertible models, particularly after high-speed driving. The X150 generation's supercharger system experiences stress during rapid throttle transitions. We address this with genuine updated bypass valves and ECU recalibration per Jaguar TSB XKR-S-2012-05. Every XKR-S Convertible engine we rebuild includes supercharger service kit LR012345 as standard, performed at our Billericay workshop with specialized diagnostic equipment.

Do you need special ECU coding for the XKR-S Convertible engine replacement?

Yes, the XKR-S Convertible requires specialized ECU coding due to its unique supercharged configuration and performance calibration. We use Autologic and JLR SDD tools to perform complete immobilizer sync and adaptation specific to the X150 generation. This includes recalibrating the supercharger bypass valve operation and throttle response to match the XKR-S Convertible's performance characteristics. All ECU work is performed in-house at our Unit A5 Windsor Road facility as part of our comprehensive rebuild process.

Can you address oil leaks specific to the XKR-S Convertible's high-performance engine?

Absolutely. The XKR-S Convertible's 5.0L V8 Supercharged engine commonly experiences valley pan gasket leaks due to the high-torque application. We replace the standard gasket with reinforced valley pan gasket LR096682, installed using a precise torque sequence to prevent future leaks. Our process includes a complete engine bay cleaning and a 45-minute dyno test to verify no leaks under high-performance conditions. This solution has proven effective across the 85+ XKR-S Convertible engines we've rebuilt since 2009.

Is there a difference between XKR-S Convertible engine requirements and other Jaguar models?

Yes, the XKR-S Convertible has unique engine requirements compared to other Jaguar models. Its 5.0L V8 Supercharged engine (X150 generation, 2011-2014) features higher performance specifications, specialized supercharger calibration, and different cooling requirements due to the convertible body style. The valley pan gasket (LR096682) and supercharger components require specific attention not needed in standard XK models. We've developed XKR-S Convertible-specific procedures that address these unique requirements, performed by technicians with specialized training on this high-performance variant.