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Service and supplier of OEM quality Diesel engine parts from leading European manufacturers

Simplex Engineering offer reconditioning services and spare parts for Bergen engines, MAN engines, MaK, Wartsila engines and more from the UK and Germany. Our team of experienced service engineers regularly rebuild Dorman Diesel engines, and are on hand to supervise or carry out work on major engine parts.

Engine spare parts

We are one of the major independent stockists of medium speed diesel components. We have worked with many of the leading European engine component manufacturers since the 1980’s. We can, on request, confirm the origin of the components which you may wish to order so that you can be reassured about the quality of the parts which you will be receiving.

The range of engines for which we hold stock includes:


B, B:32:36, B:32:40, B:35:40, C:25:33, K series, L series






M25, M32



L16/24, L21/31, L23/30, L28/32, L27/38, L32/40

*As these are licensee build engines, some of the components are sourced from Korean manufacturers


Mirrlees Blackstone

E Series, K Major, MB275


Nohab Polar

F10, F20, F30, WN25



Paxman Y3J (Valenta)


Perkins 4000

FG Wilson ‘Investor’ range



PC 2.5



APC, AP2, AP230, AR, AT, CSV, RKCM, RK3C, RK215, RK270



22, 32



L20, 32, 34SG (16 & 20 Cylinders)


Our group is one of the leading independent stockists and distributors for some of the best known diesel engine component manufacturers. If you are operating your engine under the parameter system, please let us know so that we can discuss your requirement.

  • Engine spare parts

  • Engine spare parts

Engine service and maintenance

We regularly rebuild Dorman Diesel engines to zero hours and we have full workshop facilities at our Lincoln workshop with a 10 tonne overhead crane. Our experienced service engineers are available to carry out or supervise overhauls, factory rebuilds and refurbishing of major engine components. Each item undergoes stringent inspection and is carefully tracked and tested. A detailed overhaul report is supplied with each order. We ensure rigid compliance with health and safety guidance and exercise a general duty of care with regard to our environment.

Service exchange of major components such as cylinder heads is available on request.

Engine service and maintenance

Reconditioning services

Reconditioning work is carried out both in the UK and in Germany.

Services include:

  • con rod refurbishment
  • crankshaft machining and polishing
  • cylinder head complete overhaul
  • cylinder liner honing
  • fuel injector overhaul
  • intercooler cleaning and pressure test
  • piston crack detection and remachining
  • turbocharger reconditioning
  • valve seat grinding
  • water and oil pump overhaul
  • Reconditioning services

  • Reconditioning services

More solutions

Dorota Wiśniewska
Sales & Service Representative

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Our staff speak more than 10 languages and will be happy to assist with any enquiry.

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