Jaguar XKR-S GT Engine Specialists – Rebuilt In-House | 12-Month Warranty
Expert rebuilds for every XKR-S GT - 5.0L Supercharged V8. In-house, OEM-spec, 12-month warranty.
Expert rebuilds for every XKR-S GT - 5.0L Supercharged V8. In-house, OEM-spec, 12-month warranty.
Jaguar XKR-S GT Engine Replacement – Rebuilt In-House | 12-Month Warranty
At JLR Engine Specialists Ltd, every XKR-S GT engine is rebuilt in our dedicated workshop using only Jaguar-approved components. The XKR-S GT spans the X150 platform (2013–2014 limited production), and we support the factory-fitted 5.0L Supercharged V8. With over 35 XKR-S GT 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 GT Engine Problems
These are the most frequent XKR-S GT engine issues we diagnose and repair in our workshop. Our solutions address the root cause, not just the symptoms.
| Symptom | Likely Cause | Our Solution |
|---|---|---|
| Supercharger whine with power loss | X150 timing chain tensioner failure (LR096682) | Updated tensioner kit + supercharger drive belt replacement |
| Oil leaks around engine valley | Valve cover gasket failure from track use | Complete valley pan seal replacement with upgraded gaskets |
| Check engine light after track day | High-temperature oil degradation (JLR STJ50-01) | Full oil system flush + premium synthetic replacement |
| Rough idle after cold start | Fuel injector coking from infrequent use | Ultrasonic injector cleaning + ECU recalibration |
Why Choose JLR Engine Specialists Workshop?
We're a specialist JLR engine workshop - not a broker or general garage. Every XKR-S GT 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
Specialized measurements for supercharger alignment critical to XKR-S GT performance
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Diagnostics with Autologic and JLR SDD tools
Track-specific fault code analysis for X150 platform supercharged engines
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Upgrades for track driving stress points
Reinforced timing chain system for high-RPM operation specific to XKR-S GT
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12-month unlimited mileage warranty - issued directly by us
No third-party warranty limitations for high-performance applications
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UK-wide vehicle collection
Logistics handled from our Billericay workshop to accommodate track cars
Since 2009, we've helped track enthusiasts, collectors, and performance owners restore reliability - with no hidden diagnostics fees if you proceed.
Our In-House Rebuild Process
Every XKR-S GT engine undergoes our 5-step rebuild process:
Diagnosis
Scan for supercharger codes, timing chain tensioner issues, track-related stress patterns
Metrology
- Supercharger alignment check
- Valve train component assessment
- High-RPM component wear analysis
Metrology
Measure cylinder wear, bearing clearances (<0.05mm tolerance) - critical for X150 5.0L 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 timing chain kit LR096682
XKR-S GT-Specific Upgrades
- Reinforced timing chain tensioner kit LR096682
- Upgraded valve stem seals for high-RPM operation
- ECU recalibration for track performance
Validation
45-minute dyno run + 15-mile high-speed road test (track simulation for XKR-S GT)
Testing Protocol
- 45-minute dyno run up to 170mph equivalent
- 15-mile high-speed road test (track simulation)
- Supercharger performance verification
Diagnosis
Assess supercharger health, timing chain tensioner, track-related component stress
Comprehensive Testing
- Supercharger alignment check
- Valve train component assessment
- High-RPM component wear analysis
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 timing chain kit LR096682
XKR-S GT-Specific Upgrades
- Reinforced timing chain tensioner kit LR096682
- Upgraded valve stem seals for high-RPM operation
- ECU recalibration for track performance
Validation
45-minute dyno run + 15-mile high-speed road test (track simulation)
Testing Protocol
- 45-minute dyno run up to 170mph equivalent
- 15-mile high-speed road test (track simulation)
- Supercharger performance verification
Engine Deep Dives
Detailed breakdown of each XKR-S GT engine we rebuild, with our specialist approach to common issues.
5.0L Supercharged V8 (2013–2014) – The Ultimate Performance
Track & High-Performance Use
The XKR-S GT was engineered for ultimate track performance
We tailor rebuilds for:
Our Engine Specialties:
- Reinforced timing chain kits LR096682
- Supercharger alignment verification
- High-performance valve stem seals
- Track-specific ECU mapping
- Valley pan seal replacement
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
- Fail within months of high-performance use
- Short-term fix only for track applications
- No warranty or limited coverage for high-RPM operation
- £6,500 "bargain" that fails during a track day at Silverstone
Our Rebuilt Engines
- Full disassembly and inspection for track stress points
- OEM-spec components with performance upgrades
- 12-month unlimited mileage warranty covering track use
- No hidden diagnostics fees if you proceed
- Specialized for X150 platform supercharged engine systems
Frequently Asked Questions
From £7,500-£8,200 including fitment, ECU reset, track-specific road test, and 12-month unlimited mileage warranty. This covers the complete 5.0L supercharged V8 rebuild with reinforced timing chain kit LR096682, performed at our Billericay workshop.
Yes, with our specialized rebuild process. We've rebuilt 35+ XKR-S GT engines since 2009 specifically for track applications. Our rebuilds include reinforced timing chain systems, upgraded valve stem seals, and track-specific ECU mapping to handle sustained high-RPM operation that standard rebuilds don't address.
The timing chain tensioner failure (part LR096682) is most common, especially in track-driven XKR-S GT models. This occurs due to high-RPM operation causing premature wear. We replace it with a reinforced unit in every rebuild and perform comprehensive supercharger alignment checks critical to X150 platform reliability.
Yes - we use Autologic and JLR SDD for full track-specific ECU recalibration at our Billericay workshop. This includes optimizing fuel mapping for high-performance driving, supercharger calibration, and ensuring all systems communicate properly after engine replacement, which is critical for XKR-S GT's performance characteristics.
5-7 working days at our Unit A5 Windsor Road facility. This includes complete disassembly, precision metrology to <0.05mm tolerance, machining as needed, installation of upgraded components like the reinforced timing chain kit LR096682, and our rigorous 45-minute dyno test with track simulation specific to the XKR-S GT's performance requirements.
Yes - we've handled 12 modified XKR-S GT engines since 2009. We assess all modifications during diagnosis at our Billericay workshop and can either incorporate them safely into the rebuild or recommend OEM-spec restoration for optimal reliability. Our expertise with the X150 platform ensures proper integration of any performance enhancements while maintaining engine integrity.