Work in a clean and well lit area. Ensure that you have the following aides before beginning to work: a suitable parts cleaning tank, compressed air supply, trays to keep parts and fasteners organized, and an adequate set of hand tools. An approved engine repair stand will help prevent personal injury or damage to the engine components. Special tools are designed in order to quickly and safely accomplish the operations for which they are intended. Using these tools will minimize possible damage to the engine components. Precision measuring tools are required for inspection of certain critical components. Torque wrenches are necessary for the correct assembly of various parts.