The Sodor Dieselworks is a repair yard specializing in the repair of diesel engines. It is the diesel equivalent of the Sodor Steamworks.
When it was introduced, the Dieselworks was run down and shabby, with insufficient and damaged equipment. After a fire broke out in the main building, it was rebuilt. The company's logo is a picture of a diesel similar to Den's class, which is painted on the sides of their locomotives.
The site of the Dieselworks consists of:
- An elevating turntable
- A crane named Happy Hook
- A set of lifting jacks
- An on-site smelting department
- A five-road shed to accommodate the Diesels
- A special shed for Diesel 10
- A giant vice
- The Dieselworks is located in a desert-like area, not far from Vicarstown.