Auto Mechanics

Automotive and diesel mechanics inspect, repair, and overhaul cars, buses and trucks. Although service technicians work on traditional mechanical systems, such as engines, transmissions, and drivebelts, they also must be familiar with a growing number of electronic systems. Braking, transmission, and steering systems are increasingly controlled by computer chips. Additionally, fuel injection and engine timing systems rely on microprocessors to maximize fuel efficiency and minimize harmful emissions.

Inspect brake systems, steering mechanisms, transmissions, engines, and other parts of vehicles.
Plan work procedures, using charts, technical manuals, and experience.
Read and interpret diagnostic test results to identify mechanical problems, often by using computerized diagnostic equipment.
Repair or replace worn parts, such as brake pads, wheel bearings, pistons, and gears.
Perform basic care and maintenance, including changing oil, checking fluid levels, and rotating tires.
Test-drive vehicles to ensure that they run smoothly.

Further, diesel service technicians and mechanics may work on a vehicle's electrical system, make major engine repairs, or retrofit engines with emission control systems to comply with pollution regulations. For example, they may use an oscilloscope to observe the signals produced by electronic components. After identifying malfunctioning equipment, service technicians repair and recalibrate components such as hydraulic pumps and spark plugs. Service technicians use many different tools, including power tools such as pneumatic wrenches, welding torches, and engine hoists. In fact, experienced workers literally may have several thousand dollars invested in their tool collection.

Education

Completing a vocational training program in diesel technology or heavy equipment mechanics is increasingly considered the best preparation for some entry-level positions. These programs cover diagnostic techniques, electronics, and related subjects. Programs may last 1 to 2 years and lead to a certificate. Other programs, which lead to associate's degrees, generally take 2 years to complete. These degree programs mix classroom instruction with hands-on training, and include courses on diesel technology, repair techniques, performance optimization, and equipment tooling.

Students also learn how to interpret technical manual diagrams and electronic diagnostic reports. Automotive technicians receive extensive on-the-job training, and trainees are assigned basic tasks, such as cleaning parts, checking fuel and oil levels, and driving vehicles in and out of the shop. After they learn routine maintenance, trainees move on to vehicle inspection and diagnostics, at which point a trainee is usually considered a journey-level mechanic. Employers often send experienced mechanics to special training classes conducted by manufacturers and vendors to learn about the latest diesel technology.

Certification

Certification programs enable students to learn new skills and demonstrate their expertise to potential employers. To earn certifications, candidates often complete training programs followed by a written or oral exam.

Certification Level	Skills Required
Apprentice Mechanic	Basic Automotive Theory: Fundamental concepts of automotive systems and operations. Tool Use and Maintenance: Proper use and upkeep of automotive tools and equipment. Safety Practices: Essential safety protocols and procedures to prevent accidents. Basic Diagnostics: Identifying common automotive issues and performing basic repairs.
Journeyman Mechanic	Advanced Diagnostics: Techniques for diagnosing and repairing complex automotive issues. Engine Repair: In-depth knowledge of engine components and repair methods. Electrical Systems: Understanding and troubleshooting automotive electrical systems. Transmission Repair: Skills for repairing and maintaining transmission systems.
Master Mechanic	Expert-Level Automotive Repairs: Performing high-level repairs and maintenance. Automotive System Design: Designing and modifying automotive systems for improved performance. Project Management: Managing automotive repair projects, including parts ordering and scheduling. Code Interpretation: Expert understanding and interpretation of automotive codes and standards.

Certification from the National Institute for Automotive Service Excellence (ASE) is the standard credential for diesel and other automotive service technicians. Diesel technicians may be certified in drivetrains, electronic systems, and preventative maintenance and inspection.

To earn certification, auto mechanics must have 2 years of work experience and pass one or more ASE exams. To remain certified, diesel technicians must pass a recertification exam every 5 years. Many diesel mechanics are required to have a commercial driver's license so that they may test-drive buses and large trucks.

Diesel Engines

Diesel engines are the most versatile IC Engines. With help of animation working of Diesel engine is elaborately explained in this video. Here the basic construction of diesel engine, its working and mechanical design aspects are covered.

Automatic Transmission

The working of an automatic transmission is best understood with help of a 2D animation. This video demonstrates working of Allison 6 speed transmission in a step by step logical manner. Working of reverse gear is also explained here.

How a Clutch Works?

What is happening inside a car when you press the clutch pedal? Why do you need to press the clutch pedal before you shift gears with a manual transmission? This video gives you logical answers to these questions.

Alternators

Alternators are also referred as synchronous generators. Construction details of the generator, functions of slip rings, armature coils, Automatic Voltage regulator (AVR) and pole core are explained.

Automotive Courses

Engine Repair

Diagnostic Tools: Use of diagnostic equipment for troubleshooting engine performance issues.
Fuel Systems: Inspection and repair of fuel injection systems and carburetors.
Ignition Systems: Diagnosis and repair of ignition components and systems.
Engine Performance: Optimization and tuning for optimal engine efficiency and power.
Exhaust Systems: Inspection and repair of exhaust components and emissions systems.

Steering

Steering Systems: Inspection, repair, and alignment of steering components.
Power Steering: Diagnosis and maintenance of power steering systems.
Steering Geometry: Adjustment and alignment for precise vehicle handling.
Steering Linkages: Inspection and repair of steering linkages and mechanisms.
Steering Fluids: Maintenance and replenishment of steering fluid levels.

Computer Diagnostics

On-Board Diagnostics (OBD): Interpretation of OBD codes and diagnostic procedures.
Scan Tools: Use of scan tools for retrieving and analyzing vehicle data.
Diagnostic Software: Application of diagnostic software for troubleshooting electronic systems.
Sensor Systems: Diagnosis and calibration of vehicle sensor systems.
Electronic Control Units (ECUs): Understanding and programming vehicle ECUs for optimal performance.

Automotive Maintenance

Fluid Systems: Maintenance of automotive fluids including oil, coolant, and hydraulic fluids.
Tire and Wheel Service: Mounting, balancing, and maintenance of tires and wheels.
Vehicle Inspection: Comprehensive inspection procedures for routine maintenance and safety checks.
Preventive Maintenance: Scheduled maintenance tasks to prolong vehicle lifespan and prevent breakdowns.
Exhaust Systems: Inspection and repair of exhaust components and emissions systems.

Body and Collision Repair

Body Repair Techniques: Repair and replacement of vehicle body panels and components.
Painting and Refinishing: Techniques for automotive painting, refinishing, and color matching.
Dent Repair: Methods for repairing dents and dings on vehicle surfaces.
Frame Alignment: Straightening and aligning vehicle frames for structural integrity.
Collision Repair: Procedures for repairing collision damage and restoring vehicle safety.

Automotive Systems

Ask yourself if you can see yourself being a mechanic, working with complex equipment, which can be challenging at times. While classes and internships will prepare you well, certain innate qualities that you bring to bear will help you succeed.

Automotive Engineering

The Engine is the heart of a vehicle, generating power by combusting fuel. It includes components such as the engine block, cylinders, pistons, crankshaft, camshaft, fuel injection system, and the exhaust system. The engine converts the chemical energy of fuel into mechanical energy, which drives the vehicle.

Transmission transmits power from the engine to the wheels, enabling the vehicle to change speed and direction. It typically includes components such as the gearbox, clutch, torque converter, driveshafts, differential, and axles. The transmission system can be manual, automatic, or semi-automatic, each with its own set of components and operating principles.

Suspension ensures a smooth and comfortable ride, as well as maintaining stability and control of the vehicle. It includes components such as springs, shock absorbers, struts, control arms, sway bars, and linkages. The suspension system absorbs shocks from the road surface, supports the vehicle's weight, and helps maintain tire contact with the road, enhancing traction and handling.

Braking System is responsible for slowing down or stopping the vehicle safely. It includes components such as brake pads, brake rotors, brake calipers, brake lines, brake master cylinder, brake booster, and anti-lock braking system (ABS) sensors. When the driver presses the brake pedal, hydraulic pressure is applied to the brakes, causing friction between the brake pads and rotors, which slows down the vehicle.

Electrical System powers various electrical and electronic components in the vehicle, providing functions such as starting the engine, lighting, climate control, entertainment, and communication. It includes components such as the battery, alternator, starter motor, wiring harnesses, fuses, relays, switches, sensors, computers (Electronic Control Unit), and various actuators. The electrical system also manages charging and distribution of electrical power throughout the vehicle.