What This Service Involves
When a Jaguar engine arrives that was previously rebuilt by another workshop and is not performing correctly, we carry out a systematic assessment to identify what was done incorrectly and correct it. Our focus is on the actions we take to put the engine right — not on why the previous work might have failed.
The Assessment
- Full visual inspection – we examine the engine externally for signs of improper assembly, missing components, or incorrect fittings.
- Comprehensive strip-down – we disassemble the engine to verify every aspect of the previous rebuild, including timing chain alignment, bearing clearances, and bolt torques.
- Verification of work done – we check that all components are correct for the engine and that they were installed to manufacturer specifications.
- Identification of corrective work – we compile a detailed list of what needs to be re-done, replaced, or adjusted, and provide a fixed-price quote for the remediation.
The Remediation
- Timing verification and correction – we re-check and re-set cam and crank timing using factory tools to ensure precise alignment.
- Torque and clearance checks – we re-torque all critical fasteners to correct settings and verify bearing and piston clearances.
- Component replacement – any parts that were incorrectly installed, damaged, or substandard are replaced with OEM or equivalent quality items.
- Full reassembly to factory standards – we rebuild the engine from the ground up using our documented process, ensuring every step meets Jaguar specifications.
- Post-remediation testing – we run the engine, perform diagnostics, and road-test the vehicle to confirm correct operation.
Starting Price
Remediation of a failed previous rebuild starts from:
- 4‑Cylinder (Ingenium / EcoBoost): from £2,000
- V6 Petrol (AJ126 / AJ-V6): from £3,200
- V8 Naturally Aspirated (AJ133): from £4,500
- V8 Supercharged (AJ133S): from £5,500
Final cost depends on the extent of corrective work discovered during inspection. We provide a fixed-price quote after our full strip-down assessment. View pricing disclaimer →
Gallery — Remediation Process
Applicable Models & Engines
We remediate failed rebuilds on all Jaguar models and engine families. Below are the most common ones we correct – each link goes to the dedicated page for that model or engine.
Jaguar F‑Type
X152 (2012–2024) – AJ133 5.0 supercharged V8, AJ126 supercharged V6
Engine families covered:
- AJ133 (AJ‑V8 Gen III) – 5.0 V8 naturally aspirated
- AJ133S – 5.0 V8 supercharged
- AJ126 – 3.0 V6 supercharged
- AJ200D (Ingenium diesel) – 2.0 I4 diesel
- AJ200 (Ingenium petrol) – 2.0 I4 petrol
- AJ‑V6 – 3.0 naturally aspirated V6
- AJ‑V8 – 4.2 V8 (X100/X200)
Our Process — Failed Rebuild Remediation
Arrival & initial inspection
We receive the vehicle and perform a visual inspection of the engine bay and external components.
Full strip-down
We disassemble the engine to verify every aspect of the previous rebuild – timing, torque, component condition.
Identify corrective work
We document what was done incorrectly and what needs to be re-done, replaced, or adjusted.
Quote & approval
We provide a fixed-price quote based on our findings, and obtain your approval before starting remediation.
Correction work
We re-time, re-torque, replace faulty parts, and correct all identified issues.
Reassembly to spec
We reassemble the engine using factory procedures and genuine or equivalent-quality parts.
Testing & handover
We run diagnostics, road-test the vehicle, and provide a full report on the work carried out.
Check your Jaguar
Why Choose Us
- Jaguar specialists – we know Jaguar engines inside out, including all common issues and correct assembly procedures.
- Full strip-down assessment – we don't guess; we verify every aspect of the previous work before we start.
- Fixed-price quote – you get a clear, fixed quote after our assessment, with no hidden surprises.
- OEM-quality parts – we use genuine or equivalent parts to ensure long-term reliability.
- 12‑month unlimited‑mileage warranty – our remediation work is backed by our full warranty.
- Nationwide recovery – we can arrange recovery if your vehicle is not drivable.
Recent Remediation Jobs
How It Works
Contact us
Call, email, or use our quote form to describe the issue and arrange an inspection.
Arrange arrival
We organise for your Jaguar to be delivered to our workshop – recovery available if needed.
Strip-down & quote
We fully strip and inspect the engine, then provide a fixed-price quote for remediation.
Remediation & return
We carry out the corrective work, test thoroughly, and return your Jaguar running correctly.
FAQs — Failed Previous Rebuild Remediation
What does a failed rebuild remediation involve?
We start with a full strip-down inspection to verify all previous work – checking timing alignment, torque settings, component condition, and clearances. Then we correct any issues by re-timing, re-torquing, replacing faulty parts, and reassembling to factory specifications, followed by thorough testing.
How long does a failed rebuild remediation take?
The duration depends on the extent of the issues found. Typically, a full assessment takes 1–2 days, and the correction work can take an additional 3–7 days depending on what needs to be re-done. We provide a clear timeline after inspection.
Can you fix any previous rebuild, regardless of who did it?
Yes – we specialise in correcting work from other workshops. We approach every engine with fresh eyes, strip it down fully, and rebuild it correctly using our established processes and factory specifications.
Will I get a warranty on the remediation work?
Yes – our remediation work is backed by the same 12‑month unlimited‑mileage warranty we offer on all our engine rebuilds and repairs.
What if the previous rebuild was done with non-genuine parts?
During our inspection we identify any substandard parts and replace them with OEM or equivalent quality components. We only use parts that meet or exceed Jaguar specifications.
Book your remediation assessment
Let us inspect your poorly-rebuilt Jaguar engine and give you a fixed-price quote to put it right.