Unit of competency Outline
Date retreived
22/07/2026 5:58 AM AWST
22/07/2026 5:58 AM AWST
Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.
Perform engine bottom-end overhaul
Perform engine bottom-end overhaul
Unit of competency
National Code
MEM18033B
MEM18033B
State Code
W5578
W5578
TGA Status
Replaced
Replaced
DTWD Status
Transition (Replaced)
Transition (Replaced)
State Implementation and Classification
Approved Date
18/06/2009
Field of Education
030503 - Vehicle Mechanics
Original Release Date
18/06/2009
Nominal Hours
36
Description
This unit covers dismantling, cleaning and assessing parts, recording and interpreting measurements, and reconditioning components.
Notes
Elements and Performance Criteria
1. Dismantle, clean and assess parts
- 1.1. Characteristics of surface finishes and wear patterns associated with crankshaft and piston assemblies are understood and parts are correctly assessed for reuse or replacement.
- 1.2. Engine is removed from plant, top-end components are removed and block assembly is dismantled according to manufacturers' recommendations.
- 1.3. Parts are assessed for abnormal wear or defects.
- 1.4. Appropriate cleaning solution and procedure is selected.
- 1.5. Parts are racked or set out according to their original location in the engine.
- 1.6. Characteristics of surface finishes and wear patterns associated with crankshaft and piston assemblies are understood and parts are correctly assessed for reuse or replacement.
2. Record and interpret measurements
- 2.1. Measurements are accurately obtained and recorded.
- 2.2. Readings are correctly interpreted regarding replacement or reuse and appropriate under/oversize of replacement parts is determined.
3. Recondition components
- 3.1. Ridges, gaps, tapers, ovality and protrusions are identified and necessary corrective action is taken.
- 3.2. Tools and equipment are correctly used.
- 3.3. Components are assembled according to manufacturers' specifications.
- 3.4. Bearing clearances are correctly determined by calculation or direct measurement.
RANGE STATEMENT
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
EVIDENCE GUIDE
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
A person who demonstrates competency in this unit must be able to perform engine bottom-end overhaul. Competency in this unit cannot be claimed until all prerequisites have been satisfied.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.
Context of and specific resources for assessment
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.
This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with performing engine bottom-end overhaul or other units requiring the exercise of the skills and knowledge covered by this unit.
Method of assessment
Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.
Guidance information for assessment
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
A person who demonstrates competency in this unit must be able to perform engine bottom-end overhaul. Competency in this unit cannot be claimed until all prerequisites have been satisfied.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.
Context of and specific resources for assessment
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.
This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with performing engine bottom-end overhaul or other units requiring the exercise of the skills and knowledge covered by this unit.
Method of assessment
Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.
Guidance information for assessment
Replaces
| State Code | National Code | Title | Type |
|---|---|---|---|
| M0442 | MEM18.33AA | Perform engine bottom-end overhaul | Unit of competency |
Replaced By
| State Code | National Code | Title | Type |
|---|---|---|---|
| OAT08 | MEM27030 | Perform engine bottom-end overhaul | Unit of competency |
| State Code | National Code | Title | Type |
|---|---|---|---|
| W245 | MEM40105 | Certificate IV in Engineering | Qualification |
| W247 | MEM50105 | Diploma of Engineering - Advanced Trade | Qualification |
| W237 | MEM30205 | Certificate III in Engineering - Mechanical Trade | Qualification |
| W234 | MEM20205 | Certificate II in Engineering - Production Technology | Qualification |
| W726 | LMT31909 | Certificate III in Engineering - TCF Mechanic | Qualification |