24292 version 1
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Demonstrate knowledge of motorcycle engine cylinder head faults, and
their inspection and repair requirements
Level
4
Credits
3
Purpose
This theory-based unit standard is for people in the motorcycle repair
industry. People credited with this unit standard are able to demonstrate
knowledge of motorcycle engine cylinder head faults, and motorcycle engine
cylinder head inspection and repair requirements.
Subfield
Motor Industry
Domain
Engines
Status
Registered
Status date
25 January 2008
Date version published
25 January 2008
Planned review date
31 December 2012
Entry information
Recommended: Unit 231, Explain the operation of two
and four stroke petrol and diesel engines; and Unit
24301, Disassemble, inspect, and reassemble a multicylinder motorcycle engine; or demonstrate equivalent
knowledge and skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
Accreditation and Moderation Action Plan (AMAP) reference
0014
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
Definition
Service information may include but is not limited to – technical information of a vehicle,
machine, or product detailing operation; installation and servicing procedures;
manufacturer instructions and specifications; technical terms and descriptions; and
detailed illustrations. This can be accessed in hard copy or electronic format and is
normally sourced from the manufacturer.
 New Zealand Qualifications Authority 2016
24292 version 1
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Elements and performance criteria
Element 1
Demonstrate knowledge of motorcycle engine cylinder head faults.
Performance criteria
1.1
Components of a motorcycle engine cylinder head are identified in accordance
with service information.
Range
includes but is not limited to – combustion chamber, ports,
camshaft, valve mechanism (valves, guides, guide oil seals, seats,
springs, rockers and lifters, keepers (collets), adjusters, shims,
shim buckets), machined surfaces, cooling and oil galleries, ports,
head gaskets, cylinder head bolts.
1.2
Procedures for removing and dismantling motorcycle engine cylinder heads to
identify and preserve causes of faults are described in accordance with service
information.
1.3
Damage to a motorcycle engine cylinder head that can be identified visually is
described in accordance with service information.
Range
1.4
Valve, seat insert, and guide faults are described in accordance with service
information.
Range
1.5
includes but is not limited to – damaged threads, damage to the
machined surfaces, warped surfaces, corrosion, cracks, broken
fins.
cleanliness, wear, pits, cracks, seat recession.
Valve spring faults are described in accordance with service information.
Range
squareness, tension, free length.
 New Zealand Qualifications Authority 2016
24292 version 1
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Element 2
Demonstrate knowledge of motorcycle engine cylinder head inspection and repair
requirements.
Performance criteria
2.1
Inspection procedures to identify faults to motorcycle engine cylinder head
components are described in accordance with service information.
Range
2.2
includes but is not limited to – camshaft, bearings and rockers,
rocker shaft(s), slippers, rollers, emission valve systems, baffle
plates, decompression mechanism, hydraulic lifters, tachometer
drive, valves, valve seats, shim buckets, seals, springs, machined
faces, studs, threaded holes, head gasket;
visual inspection, precision measuring.
Repair procedures to motorcycle engine cylinder heads are explained in
accordance with service information.
Range
motorcycle engine cylinder heads on – off-road and competition
machines, on-road machines;
includes but is not limited to – valves (material type, replacement
period), allowable machining, cleaning requirements, reuse of
head bolts and other components, sequence and torquing of bolts,
replacement of components in adherence to allowable stress
hours.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016