Diesel Engine Specialists

Transportation, Distribution & Logistics > Facility and Mobile Equipment Maintenance

Projected Growth: Average

Projected Job Openings

Medium Preparation Needed

Job Description

Your job is to Diagnose, adjust, repair, or overhaul buses and trucks, or maintain and repair any type of diesel engines. Includes mechanics working primarily with automobile or marine diesel engines.

Common job titles of Diesel Engine Specialists include:

Experience and Education

Previous work-related skill, knowledge, or experience is required for these occupations. For example, an electrician must have completed three or four years of apprenticeship or several years of vocational training, and often must have passed a licensing exam, in order to perform the job.

  • 40.21% said they needed a High School Diploma.

  • 29.51% said they needed a Less than a High School Diploma.


    Install or repair accessories.

    Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.

    Inspect, repair, and maintain automotive and mechanical equipment and machinery, such as pumps and compressors.

    Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.

    Examine and adjust protective guards, loose bolts, and specified safety devices.

    Follow green operational practices involving conservation of water or energy or reduction of solid waste.

    Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.

    Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.

    Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.

    Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.

    Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges.

    Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.

    Adjust or repair computer controlled exhaust emissions devices.

    Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles.

    Repair or adjust seats, doors, or windows.

    Rewire ignition systems, lights, and instrument panels.

    Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications.

    Measure vehicle emissions to determine whether they are within acceptable limits.

    Diagnose and repair vehicle heating and cooling systems.

    Align front ends and suspension systems.

    Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units.

    Specialize in repairing and maintaining parts of the engine, such as fuel injection systems.

    Rebuild gas or diesel engines.

    Operate valve-grinding machines to grind and reset valves.

    Recondition and replace parts, pistons, bearings, gears, and valves.


Workshop cranes

Wire strippers

Wire cutting tools

Wire crimpers

Wheel balancers

Welding hoods

Water pump pliers

All Tools


Vise grip pliers

Valve seat grinders

Vacuum pumps

Utility knives

Two way radios

Tungsten inert gas TIG welding equipment

Torque wrenches

Tire pressure gauges

Test lights

Tape measures


Steam cleaning equipment

Spark plug sockets

Spark plug gapping tools

Socket wrench sets

Snap ring pliers

Snap gauges

Slug wrenches

Slip joint pliers


Single-cut mill saw files

Shielded arc welding tools



Safety gloves

Safety glasses

Riveting tools



Rat tail files

Putty knives


Punch sets

Punch presses

Pump wrenches

Pry bars

Pressure gauges

Power saws

Power sanders

Power grinders

Power drills

Portable welding equipment

Pneumatic wrenches

Personal computers

Paint spray guns

Outside calipers

Open end wrenches

Needlenose pliers


Milling machines


Metal inert gas MIG welders

Locking pliers



Inside calipers

Injector pop testers

Impact wrenches

Hydraulic rams

Hydraulic pumps



Hex keys

Hearing protectors

Handheld diagnostic computers


Grinding machines

Governor test stands

Gas welding equipment

Fuel pump test stands


Flash card readers

Flare nut wrenches

Feeler gauges


Drill presses

Drill machines

Dial gauges

Dial calipers

Diagonal cutting pliers

Detroit diesel electronic control DDEC readers

Desktop computers

Depth gauges


Cutting torches

Cross peen hammers

Combination wrenches

Cold chisels

Claw hammers

Chain slings

Brazing equipment

Brass hammers

Brass drifts

Brake shoe adjusting tools

Box end wrenches

Boring tools

Boring bars

Bore gauges

Blow guns

Bleeder wrenches

Blast cleaning cabinets

Bearing heating ovens

Battery chargers

Ball peen hammers

Adjustable wrenches

Adjustable widemouth pliers

Adjustable crescent wrenches

Acetylene torches


Computer aided design CAD software

Dassault Systemes SOLIDWORKS

Computerized maintenance management system software CMMS

Cummins Insite

Engine diagnostic software

Inventory tracking software

Shop management software



Determining causes of operating errors and deciding what to do about it.


Repairing machines or systems using the needed tools.

Operation Monitoring

Watching gauges, dials, or other indicators to make sure a machine is working properly.

Operation and Control

Controlling operations of equipment or systems.

Critical Thinking

Using logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions or approaches to problems.

Equipment Maintenance

Performing routine maintenance on equipment and determining when and what kind of maintenance is needed.

Quality Control Analysis

Conducting tests and inspections of products, services, or processes to evaluate quality or performance.


Talking to others to convey information effectively.

Equipment Selection

Determining the kind of tools and equipment needed to do a job.

Judgment and Decision Making

Considering the relative costs and benefits of potential actions to choose the most appropriate one.


Monitoring/Assessing performance of yourself, other individuals, or organizations to make improvements or take corrective action.


Adjusting actions in relation to others' actions.

Complex Problem Solving

Identifying complex problems and reviewing related information to develop and evaluate options and implement solutions.

Time Management

Managing one's own time and the time of others.


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