Engine Disassembly and Assembly Engine Disassembly and Assembly - General information N14 Page 0-9 Engine Disassembly and Assembly - General information These procedures apply to all N14 engines. The differences between engine models due to the application, the optional equipment on an engine, and the year an engine was built are included in the instructions. Omit the steps that do not apply to the engine being rebuilt. 1. A warning statement is included for any component or assembly that weighs more than 23 kg [50 lb]. To avoid personal injury, use a hoist or get assistance from more than one person when removing or installing these parts. 2. All capscrews used on the N14 engine are U.S.
customary. Disassembly The instructions in this procedure are organized in a logical sequence to disassemble an engine. This is not the only sequence to disassemble an engine. Certain parts must be removed in the sequence indicated. Use this sequence until you become familiar with the engine. Discard all gaskets ( except rocker housing cover gaskets which are reusable), seals, hoses, filters, and o-rings. Keep these parts if they are needed for a failure analysis. Label, tag, or mark the parts for location as the parts are removed in order to easily find all of the parts that can be involved in a failure and to simplify the assembly procedure.
Label, tag, mark or photograph all special equipment prior to the removal from an engine. This engine assembly procedure does not include the installation of special optional equipment. Force must be used to remove certain parts. A mallet must be used when force is required. All of the fasteners must be removed before using force. Avoid as much dirt as possible during disassembly. The accumulation of additional dirt will make it more difficult to clean the components. Assembly Make sure all the components and assemblies have been cleaned, replaced or rebuilt, and are ready to be installed on the engine before beginning the assembly process. Torque values are listed in each step.
If a torque value is not specified, use the chart listed in Specifications, Group 18, to determine the correct torque value. Many of the gaskets and the o-rings are manufactured from a material designed to absorb oil. These gaskets will enlarge and provide a tight seal after coming in contact with oil. Use ONLY a recommended contact adhesive or a vegetable-based oil to install these parts. Always use a capscrew of the same system (metric or U.S. customary), the same dimension, and the same grade as the capscrew removed. The use of a longer, shorter, different grade, or wrong thread capscrew than the capscrew that is listed can result in damage to the engine.