Replacing an engine: what to prepare before fitting
A good engine is half the job – the other half is correct fitting. Here is what we recommend preparing so the replacement engine starts without problems and lasts.
Before delivery
- Make sure the code and version match the car (VIN check)
- Agree the specification – what moves over from the old engine
- Book the workshop so the engine doesn’t sit waiting
Consumables to replace
- Oil and oil filter, fuel and air filters
- Timing kit and water pump – if belt-driven or with unknown history
- Manifold, rocker cover and sump gaskets as needed
- Coolant and visibly worn hoses
- Auxiliary drive belt
Cooling and lubrication
If the old engine overheated, check the radiator, thermostat and fan – otherwise the new engine will suffer for the same reason. Before the first start, fill with oil and crank without starting to build pressure.
Turbo and fuel system
On diesels, check the intercooler and oil lines – debris from a failed turbo can damage the new engine. If you transfer injectors from the old engine, make sure they are sound and correctly coded.
Electronics and coding
Modern cars may need adaptation or coding with diagnostics after an engine swap – for example injectors, throttle body or DPF. A good workshop will do this straight away.
The first miles
Drive gently for the first few hundred kilometres, watch temperature and oil level, and change the oil early if in doubt.
Dvigateli.bg delivers engines to your workshop in Bulgaria, Greece, Spain and the UK and can recommend a fitting partner. Send an enquiry or see repair and services.
Frequently asked questions
Should I replace the timing gear on a used engine?
We recommend it on belt-driven engines or when there is no record of when it was replaced. It is cheap insurance against an expensive failure.
How long does an engine swap take?
For most passenger cars, from one to a few working days depending on the model and workshop.
Can you recommend a workshop?
Yes, we work with partner workshops – get in touch.