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Evidence Guide: MEM18034B - Perform engine top-end overhaul

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEM18034B - Perform engine top-end overhaul

What evidence can you provide to prove your understanding of each of the following citeria?

Dismantle clean and assess parts

  1. Characteristics of surface finishes and wear patterns associated with valve operating mechanisms and cylinder head are understood.
  2. Cylinder head and ancillary components are disassembled according to manufacturers' recommendations.
  3. Parts are assessed for abnormal wear or defects.
  4. Appropriate cleaning solution/procedure is selected.
  5. Parts are correctly cleaned and stored ready for reassembly.
  6. Parts are racked or set out according to their original location in the engine.
Characteristics of surface finishes and wear patterns associated with valve operating mechanisms and cylinder head are understood.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Cylinder head and ancillary components are disassembled according to manufacturers' recommendations.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Parts are assessed for abnormal wear or defects.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Appropriate cleaning solution/procedure is selected.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Parts are correctly cleaned and stored ready for reassembly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Parts are racked or set out according to their original location in the engine.

Completed
Date:

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Record and interpret measurements

  1. Measurements are accurately obtained and recorded using appropriate measuring equipment.
  2. Parts are replaced or reused, and appropriate under/over size of replacement parts is determined.
Measurements are accurately obtained and recorded using appropriate measuring equipment.

Completed
Date:

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Parts are replaced or reused, and appropriate under/over size of replacement parts is determined.

Completed
Date:

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Recondition cylinder head

  1. Cylinder head is correctly pressure tested for serviceability.
  2. Spring tensions, valve and guide dimensions and surface flatness are measured and recorded.
  3. Cylinder head is removed according to manufacturers' specification.
  4. Grinding and cleaning equipment is correctly used.
  5. Operational parameters of cylinder head components are understood and applied in determining whether components are reconditioned or replaced.
  6. Injectors sleeves, sealing washers, plugs, capping etc. are replaced correctly.
Cylinder head is correctly pressure tested for serviceability.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Spring tensions, valve and guide dimensions and surface flatness are measured and recorded.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Cylinder head is removed according to manufacturers' specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Grinding and cleaning equipment is correctly used.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Operational parameters of cylinder head components are understood and applied in determining whether components are reconditioned or replaced.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Injectors sleeves, sealing washers, plugs, capping etc. are replaced correctly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

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 top-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 top-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

Required Skills and Knowledge

Required skills

Look for evidence that confirms skills in:

reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents

planning and sequencing operations

checking task-related information

checking for conformance to specification

removing the cylinder head from the engine

dismantling the cylinder head and ancillary components

identifying the cylinder head as serviceable or requiring repair/replacement

pressure testing the cylinder head

measuring and recording spring tension, valve and guide dimensions and surface flatness

grounding valves and valve

cleaning cylinder head and ancillary equipment using appropriate solutions

identifying cylinder head components for repair or replacement

replacing cylinder head components

checking parts for abnormal wear or defects

identifying components for reuse or replacement

cleaning parts using appropriate solutions and procedures

racking and setting out engine parts according to their original position in readiness for reassembly

obtaining and recording measurements

undertaking calculations and numerical operations within the scope of this unit

Required knowledge

Look for evidence that confirms knowledge of:

the characteristics of surface finishes and wear patterns as applied to valve operating mechanisms and cylinder heads

the specifications of valve operating mechanisms and cylinder heads

the procedures, tools, techniques and equipment for dismantling cylinder heads and ancillary equipment
the hazards and control measures associated with the removal of cylinder heads and ancillary equipment, including housekeeping

the procedures for storing parts in readiness for reassembly

the procedures, tools, techniques and equipment for pressure testing cylinder heads

the cylinder head specifications

the procedures, tools, techniques and equipment for measuring spring tension, valve and guide dimensions and surface flatness

the procedures for recording cylinder head and valve mechanism measurements

the procedures, tools, techniques and equipment for removing the cylinder head from the engine

the procedures, tools, techniques and equipment for grinding valves and valve seats

the procedures and solutions for cleaning cylinder heads and ancillary equipment

the operational parameters of cylinder head components

the procedures, tools, techniques and equipment for reassembling cylinder heads and their components

the precautions to be taken when reassembling cylinder heads

safe work practices and procedures

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.