Engine replacement becomes necessary after catastrophic failure — timing chain or belt failure, severe overheating damage, spun bearings or hydrolocked engines. The cost depends heavily on which replacement route you choose.
Options
Option: Used (breaker) engine
Cost: £400-1,500 + fitting
Pros: Cheapest option
Cons: Unknown history, no warranty
Option: Remanufactured engine
Cost: £1,200-3,500 + fitting
Pros: Rebuilt to spec, warranty included
Cons: Availability varies by model
Option: OEM new engine
Cost: £3,000-8,000 + fitting
Pros: Full manufacturer warranty
Cons: Usually only cost-effective on newer cars
Frequently Asked Questions
Is engine replacement worth it?
Only if the rest of the car is solid. A £3,000 engine in a car worth £4,000 rarely makes financial sense unless the car has sentimental value or is a sought-after model.
What causes engine replacement?
Most commonly: neglected timing belt/chain failure, overheating damage (head, pistons, bore), oil starvation from neglected maintenance.