Jaguar XKR-S Coupe Engine Specialists – Rebuilt In-House | 12-Month Warranty
Expert rebuilds for every XKR-S Coupe - 5.0L Supercharged V8 (AJ-V8 Gen III), 5.0L Supercharged V8 (AJ-V8 Gen IV). In-house, OEM-spec, 12-month warranty.
Expert rebuilds for every XKR-S Coupe - 5.0L Supercharged V8 (AJ-V8 Gen III), 5.0L Supercharged V8 (AJ-V8 Gen IV). In-house, OEM-spec, 12-month warranty.
Jaguar XKR-S Coupe Engine Replacement – Rebuilt In-House | 12-Month Warranty
At JLR Engine Specialists Ltd, every XKR-S Coupe engine is rebuilt in our dedicated workshop using only Jaguar-approved components. The XKR-S Coupe spans X150 (2011–2014), and we support all factory-fitted engines. With over 185 XKR-S Coupe 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 Coupe Engine Problems
These are the most frequent XKR-S Coupe engine issues we diagnose and repair in our workshop. Our solutions address the root cause, not just the symptoms.
| Symptom | Likely Cause | Our Solution |
|---|---|---|
| Engine misfire under high boost | 5.0L Supercharged V8 (AJ-V8 Gen III) high-pressure fuel pump failure (LR024578) | Bosch updated fuel pump + recalibration per JLR TSB XKR-S-2013-07 |
| Oil consumption during spirited driving | 5.0L Supercharged V8 (AJ-V8 Gen IV) piston ring wear from track use | Mahle piston rings + cylinder honing to JLR spec <0.05mm tolerance |
| Supercharger whine at low RPM | X150-specific supercharger pulley wear (LR018365) | Upgraded supercharger assembly + belt tensioner replacement |
| Timing chain rattle during cold starts | 5.0L Supercharged V8 timing chain tensioner failure (LR096682) | Updated timing chain kit + precision alignment to JLR SWE-21-15 |
Why Choose JLR Engine Specialists Workshop?
We're a specialist JLR engine workshop - not a broker or general garage. Every XKR-S Coupe engine is rebuilt in-house by our technicians, using only OEM-spec or premium aftermarket parts (Mahle, Elring, Jaguar).
Our service includes:
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Full strip-down and precision metrology
X150-specific focus on supercharger alignment and bearing health checks for high-performance driving
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Diagnostics with Autologic and JLR SDD tools
Specialized software for supercharger calibration and boost control systems unique to XKR-S
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Upgrades for XKR-S Coupe-specific stress points
Reinforced supercharger internals for track use, high-flow oil pumps for sustained high-RPM operation
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12-month unlimited mileage warranty - issued directly by us
No third parties - backed by our Billericay workshop with full documentation
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UK-wide vehicle collection
Logistics handled from our Unit A5 Windsor Road, Ramsden Heath, Billericay facility
Since 2009, we've helped performance enthusiasts, track day drivers, and collectors restore reliability - with no hidden diagnostics fees if you proceed.
Our In-House Rebuild Process
Every XKR-S Coupe engine undergoes our 5-step rebuild process:
Diagnosis
Scan for supercharger calibration errors, boost control faults, and high-performance driving stress indicators
XKR-S-Specific Testing
- Supercharger alignment verification
- High-pressure fuel system integrity
- Boost control sensor calibration
Metrology
Measure cylinder wear, bearing clearances (<0.05mm tolerance) - critical for 5.0L Supercharged V8 longevity
Precision Standards
- Crankshaft runout (<0.05mm)
- Bearing clearance measurement
- Cylinder bore wear assessment
Machining
Block honing, head skimming - all done on-site at our Billericay facility
On-Site Facilities
- CNC cylinder head skimming
- Pressure testing
- Plateau honing
Upgrades
5.0L Supercharged V8 → reinforced supercharger internals, updated timing chain kit LR096682
XKR-S-Specific Upgrades
- Reinforced supercharger internals for track use
- High-flow oil pump for sustained high-RPM operation
- ECU recalibration for performance optimization
Validation
45-minute dyno run + 15-mile performance road test (high-speed stability verification)
Testing Protocol
- 45-minute dyno run with boost validation
- 15-mile high-speed stability road test
- Supercharger calibration verification
Diagnosis
Assess supercharger alignment, boost control system, high-pressure fuel integrity
Comprehensive Testing
- Supercharger alignment verification
- High-pressure fuel system integrity
- Boost control sensor calibration
Metrology
Measure cylinder wear, bearing clearances (<0.05mm tolerance)
Precision Standards
- Crankshaft runout (<0.05mm)
- Bearing clearance measurement
- Cylinder bore wear assessment
Machining
Block honing, head skimming - all done on-site
On-Site Facilities
- CNC cylinder head skimming
- Pressure testing
- Plateau honing
Upgrades
5.0L Supercharged V8 → reinforced supercharger internals, updated timing chain kit LR096682
XKR-S-Specific Upgrades
- Reinforced supercharger internals for track use
- High-flow oil pump for sustained high-RPM operation
- ECU recalibration for performance optimization
Validation
45-minute dyno run + 15-mile performance road test (high-speed stability verification)
Testing Protocol
- 45-minute dyno run with boost validation
- 15-mile high-speed stability road test
- Supercharger calibration verification
Engine Deep Dives
Detailed breakdown of each XKR-S Coupe engine we rebuild, with our specialist approach to common issues.
5.0L Supercharged V8 (AJ-V8 Gen III) (2011–2012) – The High-Performance Icon
5.0L Supercharged V8 (AJ-V8 Gen IV) (2013–2014) – The Track-Ready Powerhouse
Performance & Track Use
The XKR-S Coupe was engineered for high-performance driving and track capability
We tailor rebuilds for:
Our Engine Specialties:
- Reinforced supercharger internals (LR018365)
- High-pressure fuel pump upgrades (LR024578)
- Updated timing chain kits (LR096682)
- Mahle performance piston rings
- Supercharger calibration verification
Rebuilt vs. Used Engines
Used engines often fail within months due to hidden stress damage. Our rebuilt units include:
Used Engine Risks
- Hidden track stress damage
- Supercharger wear not visible during inspection
- Undisclosed oil consumption issues
- No warranty or limited coverage
- £6,500 "bargain" that fails during high-speed driving
Our Rebuilt Engines
- Full disassembly and inspection of supercharger components
- OEM-spec components with XKR-S-specific upgrades
- 12-month unlimited mileage warranty issued by our Billericay workshop
- No hidden diagnostics fees if you proceed
- Address AJ-V8 Gen III & Gen IV specific systems
Service Coverage for XKR-S Coupe Owners
We offer UK-wide vehicle collection and specialise in XKR-S Coupe performance enthusiasts, track day drivers, and collectors.
Click on any location to visit our dedicated service page for that area.
Frequently Asked Questions
From £7,500–£8,200 for the AJ-V8 Gen III and £7,800–£8,500 for the AJ-V8 Gen IV - including fitment, ECU reset, road test, and 12-month unlimited mileage warranty. All work is completed at our Unit A5 Windsor Road, Ramsden Heath, Billericay facility.
We've rebuilt 185+ XKR-S Coupe engines since 2009, specializing in both the AJ-V8 Gen III (2011-2012) and AJ-V8 Gen IV (2013-2014) models. Our expertise includes addressing X150 platform-specific issues like supercharger pulley wear and high-pressure fuel system failures.
Yes - with our track-specific rebuild package including reinforced supercharger internals, high-flow oil pumps, and Mahle performance piston rings. We've successfully supported 70+ track day enthusiasts since 2009 with no warranty claims related to high-performance use. All components meet JLR specifications with additional performance-focused upgrades.
Supercharger pulley wear (part LR018365) is the most common issue, especially in vehicles used for track days or spirited driving. We replace this with reinforced components during every rebuild and perform precise alignment checks to JLR specifications (<0.05mm tolerance). This addresses the root cause rather than just replacing the failed part.
Yes - we use Autologic and JLR SDD tools for complete ECU recalibration specific to the XKR-S Coupe's supercharged V8. This includes boost control system optimization, throttle response calibration, and adaptation to our performance upgrades. All recalibrations follow JLR technical service bulletins including TSB XKR-S-2013-07 for proper integration with our rebuilt engines.
Yes - the Gen IV (2013-2014) produces 575 HP compared to the Gen III's 550 HP and features updated supercharger calibration. The Gen IV also has revised piston ring design that's more susceptible to wear during track use. We address these differences with specific rebuild protocols: reinforced supercharger internals for Gen III and Mahle performance piston rings for Gen IV, along with model-specific ECU recalibration at our Billericay workshop.