Engine Repairs in Sunbury-on-Thames
Engine faults range from a failing coil to internal mechanical wear. Getting the diagnosis right is what separates an efficient repair from a series of expensive guesses.
We diagnose and repair engines on all makes and models, with particular depth on BMW, Jaguar and Land Rover.
Safety first: If the engine is overheating, knocking heavily or the oil warning is on, stop driving and contact us.
Common signs
Symptoms worth checking
- Misfire, shaking or rough idle
- Engine warning light or limp mode
- Loss of power
- Oil or coolant consumption
- Smoke from the exhaust
- Knocking or tapping noises
Finding the cause before replacing parts
A misfire could be ignition, fuel, air or mechanical. We use fault data, compression and leak-down testing, smoke testing and inspection to narrow the cause.
Many serious-sounding faults can be repaired without replacing the whole engine — we’ll tell you honestly where that’s the case.
What we check
- Fault codes and live data
- Compression and leak-down
- Ignition and fuel delivery
- Intake and vacuum leaks
- Oil and coolant condition
What we can do
- Ignition and fuel system repairs
- Gasket and seal replacement
- Cylinder head work
- Timing system repairs
- Internal repairs or rebuild where justified
How it works
The process
- 01
Tell us the symptoms.
- 02
We diagnose and explain the cause.
- 03
You authorise the quoted repair.
- 04
We repair and road test.
Why The Factory
Main-dealer capability, independent service
A Master Technician-led workshop with seven mechanical ramps, a dedicated MOT ramp and dealer-level diagnostics. Faults are shown to you and additional work is quoted before it goes ahead.
We stand behind the work we carry out. Parts and workmanship are covered in accordance with your statutory rights and any applicable manufacturer or supplier warranty. Please ask us for details relevant to your repair.
- Dealer-level diagnostics
- Engine rebuild capability in-house
- BMW and JLR specialist experience
Free local collection & return
Available by arrangement within approximately five miles of our Sunbury-on-Thames workshop. Further afield? Just ask us.
Courtesy cars
Courtesy cars are available, subject to availability.
FAQs
Engine Repairs: your questions answered
Why is my engine misfiring?
Common causes include ignition coils, spark plugs, injectors, air leaks or mechanical issues such as low compression. Diagnosis confirms which.
What should I do if my engine warning light comes on?
If it’s flashing or the car is running badly, reduce load and stop when safe. If it’s steady and the car drives normally, book a diagnostic soon.
Can you diagnose low compression or poor running?
Yes — through compression and leak-down testing alongside data analysis.
Why is my engine using oil or coolant?
Possible causes include leaks, worn seals or rings, turbo issues, or head gasket faults. We test to find which.
Can you repair major engine faults without replacing the entire engine?
Often, yes. Where a targeted repair or rebuild is the better option, we’ll explain why.
Related services
Engine Rebuilds
Diagnosed, planned engine rebuilds as an alternative to replacement.
Vehicle Diagnostics
Dealer-level fault finding — not just reading and clearing codes.
Cooling System Repairs
Overheating, coolant loss and heater problems diagnosed and repaired.
Oil Leak Diagnosis & Repair
Tracing the true source of oil leaks and repairing them properly.
Turbocharger Repairs
Confirming turbo faults properly and repairing the cause, not just the symptom.
Need help with engine repairs?
Send your registration and a quick description on WhatsApp, or call the workshop.
The Factory, Harris Way, Sunbury-on-Thames TW16 7EL