Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

  1. Prepare to diagnose and repair heavy vehicle compression ignition engine
  2. Diagnose engine
  3. Repair engine
  4. Complete work processes
  5. Prepare to diagnose and repair heavy vehicle compression ignition engine
  6. Diagnose engine
  7. Repair engine
  8. Complete work processes

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for:

isolating and stabilising heavy vehicles or machines

lifting and supporting heavy vehicle compression ignition engines

operating compression ignition engines.

Environmental requirements must include:

procedures for trapping, storing and disposing of oil and fluid released from compression ignition engines.


Performance Evidence

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

diagnose and repair a fault in two different heavy vehicle compression ignition engines, including diagnosing and repairing a fault in:

an engine cylinder head, which must include removing the cylinder head from the engine

an engine bottom end, which must include removing the crankshaft, pistons and connecting rods from the engine

dismantle and reassemble one of the above compression ignition engines, ensuring that engine is running at the end of the repair.


Knowledge Evidence

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to diagnosing and repairing heavy vehicle compression ignition engines, including procedures for:

isolating and stabilising heavy vehicles or machines

lifting and supporting heavy vehicle compression ignition engines

working with compression ignition engines

environmental requirements, including procedures for trapping, storing and disposing of oil and fluid released from compression ignition engines

operating principles of heavy vehicle compression ignition engines and associated components, including:

combustion, including:

combustion cycle

swept volume and engine volume

compression ratio

valve timing

engine efficiency, including volumetric efficiency, thermal efficiency and mechanical efficiency

torque and horsepower, including brake horsepower

application, purpose and operation of heavy vehicle compression ignition engines and components, including:

lubrication system, cylinder blocks, cylinder liners, pistons, cylinder heads, combustion chambers, inlet and exhaust manifolds, connecting rods, crankshafts, pistons, piston rings, gudgeon pins, camshafts, timing gears, vibration dampers and flywheels

diagnostic testing procedures for heavy vehicle compression ignition engines, including:

engine compression tests

cylinder leakage tests

oil pressure tests

source of fluid leak diagnosis

exhaust smoke diagnosis

abnormal engine noise diagnosis

dismantling, inspection and reassembly procedures for heavy vehicle compression ignition engines, including procedures for:

measuring clearances and tolerances, including:

crankshaft and camshaft bearings and journals

main bearing and connecting rod tunnels

cylinder bores and pistons

liner depths and protrusions

cylinder heads

inspecting components

repair procedures for heavy vehicle compression ignition engines, including procedures for removing and refitting the:

cylinder head

piston and connecting rod

crankshaft

cylinder liner

post-repair testing procedures for heavy vehicle compression ignition engines.