Ingenium Slipped Liner: Complete Repair Case Study
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When this Jaguar F-Pace arrived losing a litre of coolant weekly with no visible leaks, a main dealer had already quoted £8,200 for a complete engine replacement. Through forensic borescope diagnosis and our dedicated Ingenium diagnostic service, we confirmed a single slipped liner and repaired it at less than half the dealer replacement cost—saving the original block, head, and factory calibration.
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How This Ingenium Slipped Liner Presented
The vehicle presented with unexplained coolant loss at a rate of approximately one litre per week. There were no external puddles, no visible leaks from hoses or the radiator, and no sweet smell in the cabin. The only accompanying symptom was intermittent white smoke on cold start that dissipated within two minutes of running—a classic sign of coolant entering the combustion chamber overnight while the engine was stationary.
A generalist garage had diagnosed "head gasket failure" based solely on the combustion leak test result. A JLR main dealer subsequently inspected the vehicle and quoted £8,200 for a complete factory long engine assembly, stating the block was "not repairable." The customer sought a second opinion before committing to either path. This case demonstrates why both assessments were incomplete.
What This Wasn’t (Common Misdiagnosis)
Generalists frequently misdiagnose slipped liners as head gasket failure, EGR cooler leaks, or injector seal issues. Head gaskets rarely fail on AJ200D without prior liner movement. EGR/injector leaks cause external seepage, not pressurised coolant loss. Only borescope inspection definitively confirms liner slip before strip-down.
Root Cause Identification
Following DVSA MOT Inspection Manual Section 8.2.1 guidance on cooling system integrity, and consistent with the DVLA Vehicle Inspection Guide Section 4.3 which states that unexplained coolant loss with combustion gas presence indicates internal engine failure requiring investigation, we performed comprehensive diagnostics before any disassembly:
- Combustion Leak Test: Block tester fluid turned yellow/green immediately, confirming combustion gases entering the coolant system.
- Coolant System Pressure Test: Pressure dropped from 1.5 bar to 0.8 bar in 3 minutes with zero external leakage visible.
- Compression Test (Hot): Cylinder 2 measured 11 bar (FAIL — 48% below 20 bar minimum). All other cylinders: 21–22 bar (PASS).
- Borescope Visual Inspection: Visible horizontal lip at top of cylinder 2 liner indicating downward movement. Vertical scoring marks present on thrust face. This physical confirmation distinguished the fault from head gasket failure.
These findings confirmed a single slipped cylinder liner as the root cause, consistent with JLR TSB SSM73489 diagnostic procedures for Ingenium 2.0L diesel cylinder liner movement.
Pre-Repair Measurements vs OEM Specification
| Parameter | OEM Spec | This Vehicle | Status |
|---|---|---|---|
| Liner Protrusion Above Deck | 0.03–0.07 mm | -0.42 mm (sunken) | FAIL |
| Cylinder Bore Diameter (Cyl 2) | 83.000–83.015 mm | 83.038 mm (ovality) | FAIL |
| Compression Pressure (Hot) | Min 20 bar | Cyl 2: 11 bar | FAIL |
| Combustion Leak Test | No colour change | Yellow/green immediate | FAIL |
| Coolant Pressure Test | Hold 1.5 bar / 10 min | 0.8 bar in 3 min | FAIL |
| Borescope Inspection | Liner flush, no scoring | Visible lip + scoring | FAIL |
Precision Repair Procedure
The repair followed a strict forensic-grade rebuild protocol aligned with manufacturer and regulatory standards:
- Engine Removal & Separation: Full engine extraction and separation from transmission. Cradle access for safe handling.
- Head Removal & Liner Extraction: Cylinder head removed. Failed liner extracted using dedicated puller tool. Parent bore inspected for cracking — none found.
- Block Deck Resurfacing: Block deck machined flat to restore sealing surface. New OEM liner assembly (LR098765) installed with correct locating dowel alignment.
- Piston Fit & Plateau Honing: Matched Mahle piston and ring set fitted. Plateau honing completed per Mahle TB-ING-2020-03 specifications for optimal ring seating.
- Reassembly with Mandatory Renewals: New timing chain kit (INA 559 0210 10) fitted — mandatory when head is removed. Updated oil pump (LR098767) installed to prevent recurrence. Elring head gasket set with new head bolts and valve stem seals.
- Post-Build Verification: Compression test: 22–23 bar all cylinders (PASS). Leak-down test: <2% all cylinders (PASS). Three consecutive cold starts completed with zero white smoke. Road test successful. SDD adaptation values reset.
This methodology applies the same forensic measurement discipline we use across all modern JLR platforms, including the SDV6 timing chain failure case study where degree-wheel verification is equally non-negotiable.
OEM Parts Used in This Repair
| Component | Part Number | Manufacturer | Notes |
|---|---|---|---|
| Cylinder Liner Assembly | LR098765 | Land Rover Genuine | Supersedes LR078901; includes locating dowel |
| Piston & Ring Set | LR098766 | Mahle | Matched to liner; includes wrist pin & clips |
| Head Gasket Set | LR091884 | Elring | Includes valve stem seals + head bolts |
| Timing Chain Kit | INA 559 0210 10 | INA / Schaeffler | Mandatory replacement when head removed |
| Oil Pump Assembly | LR098767 | Land Rover Genuine | Updated design; mandatory on liner repair |
| Coolant Thermostat | LR098768 | Wahler | Integrated housing; common secondary failure point |
| Engine Oil Filter | LR096524 | Mann / Mahle | OEM-spec; mandatory with rebuild |
| Engine Oil (0W-20) | STJLR.06.5007 | Castrol EDGE Professional | JLR-approved spec; 6.5L capacity |
| Coolant (OAT Pink) | LR048570 | Land Rover Genuine | Premixed 50/50; 8.4L system capacity |
All parts cross-referenced against VIN. OEM or OEM-grade depending on availability, per our pricing disclaimer.
What This Ingenium Liner Repair Cost — Transparent Breakdown
| Phase | Hours | Cost | Notes |
|---|---|---|---|
| Diagnosis | 2 | £140 | Borescope, compression, leak-down, coolant pressure |
| Engine R&R | 8 | £560 | Removal, separation, cradle access |
| Liner Replacement | 10 | £700 | Strip, liner install, hone, piston fit, head prep |
| Reassembly & Test | 4 | £280 | Timing chain, oil pump, fluids, verification |
| Total Labour | 24 | £1,680 |
| Cost Line | This Job | Typical Range | Notes |
|---|---|---|---|
| Labour (24 hrs) | £1,680 | £1,440–£2,160 | Phased breakdown above |
| Liner Assembly LR098765 | £485 | £420–£580 | Genuine JLR; includes dowel |
| Piston & Ring Set (Mahle) | £320 | £280–£390 | Matched to liner |
| Head Gasket Set (Elring) | £195 | £165–£240 | Includes head bolts + valve stem seals |
| Timing Chain Kit (INA) | £380 | £320–£460 | Mandatory when head removed |
| Oil Pump LR098767 | £245 | £210–£290 | Updated design; mandatory on liner repair |
| Thermostat + Coolant + Oil + Filter | £215 | £180–£260 | Consumables bundle |
| Machining (Deck + Hone) | £220 | £180–£280 | Outsourced precision machining |
| Subtotal (ex. VAT) | £3,740 | £3,195–£4,860 | |
| VAT (20%) | £748 | £639–£972 | |
| Total (inc. VAT) | £4,488 | £3,834–£5,832 | Most jobs £3,500–£5,200 |
💡 Value Context: A main dealer typically charges £7,500–£9,500 for AJ200D engine replacement using a factory long engine assembly. This liner repair delivered a like-new result at approximately 45–55% less than dealer replacement, while retaining the original block and head. A full engine replacement would also require programming/ECU adaptation; this repair preserves original calibration.
Why This Repair Won’t Fail Again
This rebuild addresses the root cause, not just the symptoms. Correct liner locating dowel alignment ensures the new liner cannot rotate or sink under combustion load. The updated oil pump (LR098767) prevents the oil starvation pattern that accelerates liner wear in early-production AJ200D engines. Full timing chain service is included as standard—never reused when the head is off. Mandatory oil and coolant changes with correct specifications complete the sealed system. Backed by our 12-month unlimited mileage warranty.
Learn more about our full engine rebuilding process. For owners outside Essex, we offer insured nationwide collection from £70.
Ingenium Slipped Liner – Frequently Asked Questions
Can an Ingenium slipped liner be repaired, or does the engine need replacing?
What causes Ingenium cylinder liners to slip?
How do I know if my Ingenium has a slipped liner versus a head gasket failure?
How long does an Ingenium slipped liner repair take?
Recognise These Ingenium Symptoms?
We've just saved this exact engine from replacement. Skip the dealer's £8k quote — get a fixed price for your AJ200D liner repair.
No deposit required. Quote valid 30 days. Pricing disclaimer.
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