This plan of instruction, lesson plans, student study guides, and programed texts for a secondary-postsecondary level course in engine mechanics is one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. It is the fourth of a four-part course (see Note for other sections) covering general vehicle mechanics, including inspection, maintenance, and repair. The plan of instruction suggests number of hours of class time devoted to each lesson in two blocks of instruction (Blocks VI and VIII), a total of 139.5 hours of instruction: (1) Brakes and Suspension (8 lessons, 94 hours), including hydraulic brakes, conventional and power steering systems, and service and adjustment of beam-type, front axle and independent suspension systems and (2) Compression Ignition Engines and Automotive Air Conditioning, (4 lessons, 45.5 hours), including compression ignition engine familiarization, operation, and servicing and principles of, construction, operation, inspection, troubleshooting. evacuating, and charging air conditioning systems. It also details criterion objectives and support materials needed. Lesson plans outline teaching steps. Student materials in Block VI include two study guides containing objectives, text, and review questions and seven programed texts and in Block VII a study guide. Military manuals, commercial texts, and audiovisuals are suggested, but not provided. (YLB)