Jaguar X-TYPE Sport Premium Engine Specialists – Rebuilt In-House | 12-Month Warranty
Expert rebuilds for every X-TYPE Sport Premium - 2.5L V6, 3.0L V6. In-house, OEM-spec, 12-month warranty.
Expert rebuilds for every X-TYPE Sport Premium - 2.5L V6, 3.0L V6. In-house, OEM-spec, 12-month warranty.
Jaguar X-TYPE Sport Premium Engine Replacement – Rebuilt In-House | 12-Month Warranty
At JLR Engine Specialists Ltd, every X-TYPE Sport Premium engine is rebuilt in our dedicated workshop using only Jaguar-approved components. The X-TYPE Sport Premium spans X400 generation (2001–2009), and we support all factory-fitted engines. With over 185 X-TYPE Sport Premium engines restored since 2009, we provide transparent, all-in pricing and a 12-month unlimited mileage warranty - backed by our specialist team.
Common X-TYPE Sport Premium Engine Problems
These are the most frequent X-TYPE Sport Premium engine issues we diagnose and repair in our workshop. Our solutions address the root cause, not just the symptoms.
| Symptom | Likely Cause | Our Solution |
|---|---|---|
| Timing chain rattle on cold start | AJ25/AJ30 timing chain tensioner wear (X400 chassis) | Updated tensioner kit LR096682 + precision alignment |
| Oil leaks near engine valley | Valley pan gasket failure (common on high-mileage X-TYPE Sport Premium) | Reinforced gasket replacement + full oil system flush |
| Rough idle and throttle hesitation | Throttle body issues (AJ25/AJ30 specific to X-TYPE Sport Premium) | Throttle body cleaning + ECU recalibration per JLR TSB X400-023 |
| Coolant contamination in oil | Head gasket failure (X400 chassis specific to high-temperature operation) | OEM-spec head gasket replacement + cylinder head flatness verification |
Why Choose JLR Engine Specialists Workshop?
We're a specialist JLR engine workshop - not a broker or general garage. Every X-TYPE Sport Premium 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
Complete disassembly with focus on X400 chassis-specific wear patterns
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Diagnostics with Autologic and JLR SDD tools
X-TYPE Sport Premium-specific fault code analysis using chassis number verification
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Upgrades for X-TYPE Sport Premium-specific stress points
Reinforced valley pan gaskets and updated timing chain kits for X400 chassis
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12-month unlimited mileage warranty - issued directly by us
Backed by our Billericay workshop with no third-party involvement
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UK-wide vehicle collection
Logistics handled from our Unit A5 Windsor Road facility
Since 2009, we've helped X-TYPE Sport Premium enthusiasts, classic Jaguar collectors, and daily drivers restore reliability - with no hidden diagnostics fees if you proceed.
Our In-House Rebuild Process
Every X-TYPE Sport Premium engine undergoes our 5-step rebuild process:
Diagnosis
Scan for X400 chassis-specific fault codes, timing chain tensioner issues, valley pan leaks
X-TYPE Sport Premium-Specific Testing
- Timing chain tensioner health check
- Valley pan gasket integrity
- Throttle body performance
Metrology
Measure cylinder wear, bearing clearances (<0.05mm tolerance) - critical for AJ25/AJ30 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
AJ25 → updated timing chain kit LR096682; AJ30 → reinforced valley pan gasket
X-TYPE Sport Premium-Specific Upgrades
- AJ25: Updated timing chain kit LR096682
- AJ30: Reinforced valley pan gasket
- Throttle body recalibration per JLR TSB X400-023
Validation
45-minute dyno run + 15-mile road test (classic Jaguar driving simulation)
Testing Protocol
- 45-minute dyno run
- 15-mile classic Jaguar driving simulation
- Full electronics integration check
Diagnosis
Assess timing chain tensioner health, valley pan integrity, throttle body performance
Comprehensive Testing
- Timing chain tensioner health check
- Valley pan gasket integrity
- Throttle body performance
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
AJ25 → updated timing chain kit LR096682; AJ30 → reinforced valley pan gasket
X-TYPE Sport Premium-Specific Upgrades
- AJ25: Updated timing chain kit LR096682
- AJ30: Reinforced valley pan gasket
- Throttle body recalibration per JLR TSB X400-023
Validation
45-minute dyno run + 15-mile road test (classic Jaguar driving simulation)
Testing Protocol
- 45-minute dyno run
- 15-mile classic Jaguar driving simulation
- Full electronics integration check
Engine Deep Dives
Detailed breakdown of each X-TYPE Sport Premium engine we rebuild, with our specialist approach to common issues.
2.5L V6 (2001–2009) – The Classic Performer
3.0L V6 (2001–2009) – The Premium Choice
Classic Luxury & Daily Driver Use
The X-TYPE Sport Premium was designed for refined classic luxury driving
We tailor rebuilds for:
Our Engine Specialties:
- Updated timing chain kits LR096682
- Reinforced valley pan gaskets
- Throttle body recalibration per JLR TSB X400-023
- Complete AJ25/AJ30 rebuilds
- Classic Jaguar driving simulation testing
Rebuilt vs. Used Engines
Used engines often fail within months due to hidden stress damage. Our rebuilt units include:
Used Engine Risks
- Hidden X400 chassis-specific wear patterns
- Timing chain tensioner failure within months
- Valley pan gasket leaks from age-related degradation
- No warranty or limited coverage for X-TYPE Sport Premium
- £4,500 "bargain" that fails during classic Jaguar driving conditions
Our Rebuilt Engines
- Full disassembly and inspection for X400 chassis-specific issues
- OEM-spec components including timing chain kit LR096682
- 12-month unlimited mileage warranty issued directly by us
- No hidden diagnostics fees if you proceed
- Address AJ25, AJ30 and X400 chassis-specific systems
Service Coverage for X-TYPE Sport Premium Owners
We offer UK-wide vehicle collection and specialise in X-TYPE Sport Premium enthusiasts, classic Jaguar collectors, and daily drivers.
Click on any location to visit our dedicated service page for that area.
Frequently Asked Questions
From £6,100–£6,700 including fitment, ECU reset, road test, and 12-month warranty. This covers the AJ30 engine found in X-TYPE Sport Premium models (2001-2009), including updated timing chain kit LR096682 and reinforced valley pan gasket replacement at our Billericay workshop.
Yes - we've rebuilt over 85 AJ25 engines for X-TYPE Sport Premium models since 2009. Our specialists are experienced with the X400 chassis-specific issues including timing chain tensioner wear and valley pan gasket leaks. We use the updated timing chain kit LR096682 and perform thorough metrology to ensure proper bearing clearances (<0.05mm tolerance).
Yes - with our rebuild process addressing X400 chassis-specific weaknesses, the X-TYPE Sport Premium becomes highly reliable. We've restored over 185 X-TYPE Sport Premium engines since 2009, focusing on the common failure points like timing chain tensioner wear and valley pan gasket leaks. Our 45-minute dyno run and 15-mile classic Jaguar driving simulation road test ensures proper operation before delivery from our Unit A5 Windsor Road facility.
Timing chain tensioner failure is the most common issue, particularly in high-mileage X-TYPE Sport Premium models. The AJ25/AJ30 engines in the X400 chassis are prone to tensioner wear, which can cause chain rattle on cold start and potentially lead to catastrophic engine damage. We address this by installing the updated timing chain kit LR096682 during every rebuild, verified through precision metrology at our Billericay workshop.
Yes - we use Autologic and JLR SDD tools for complete ECU coding and adaptation after engine replacement. This includes throttle body recalibration per JLR Technical Service Bulletin X400-023, which is critical for proper operation of the X-TYPE Sport Premium's drive-by-wire system. All coding is performed at our Unit A5 Windsor Road facility by technicians with specific X400 chassis expertise.
No - the engine itself is identical across X-TYPE trims. The Sport Premium trim features the same AJ25 or AJ30 engines as other X-TYPE models, but with additional luxury features. However, Sport Premium models often have different driving patterns that can affect engine wear - we account for these patterns in our rebuild process at our Billericay workshop, particularly regarding throttle body operation and emissions system calibration.