11728 version 3
Page 1 of 4
Prepare to and machine engine short block assemblies
Level
4
Credits
25
Purpose
This unit standard is for people in the automotive machining industry. People
credited with this unit standard are able to prepare to machine engine short
block assemblies, and machine engine short block assemblies.
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 24275, Disassemble, inspect, and
reassemble an engine short block under general
supervision; and Unit 24306, Carry out general repairs to
an engine short block; 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
1
Legislation relevant to this unit standard includes but is not limited to – Health and
Safety in Employment Act 1992; Resource Management Act 1991, s15 Discharge of
contaminants into environment.
2
Definitions
Company requirements refer to instructions to staff on policy and procedures which
are documented in memo or manual format and are available in the workplace.
These requirements include but are not limited to – company specifications and
procedures, work instructions, manufacturer specifications, product quality
specifications, and legislative requirements.
 New Zealand Qualifications Authority 2016
11728 version 3
Page 2 of 4
Machining refers to the complete rebuild of the short block assembly which includes
the machining operations as stated in this unit standard, and the use of new or remachined components as required to make the short block assembly fully and safely
operational.
Suitable tools and equipment means industry approved tools and equipment that are
recognised within the industry as being the most suited to complete the task in a
professional and competent manner with due regard to safe working practices.
3
Assessment against this standard includes a minimum of three petrol fuelled short
block assemblies from different multi-cylinder engine configurations, and three diesel
fuelled short block assemblies from different multi-cylinder engine configurations.
Elements and performance criteria
Element 1
Prepare to machine engine short block assemblies.
Performance criteria
1.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
personal safety, safety of others, workshop safety, environmental
safety, tools and equipment safety.
1.2
Suitable tools and equipment are selected and used to enable engine short
block assemblies to be prepared for machining in accordance with company
requirements.
1.3
The short block assemblies are inspected in accordance with company
requirements.
Range
1.4
visual inspection, precision measuring.
A condition report is completed in accordance with company requirements.
Range
report includes but is not limited to – estimated cost of repair
compared to replacement cost, workshop operations required,
outwork arrangements.
Element 2
Machine engine short block assemblies.
Performance criteria
2.1
Safe working practices are observed throughout the task in accordance with
legislative requirements.
Range
personal safety, safety of others, workshop safety, environmental
safety, tools and equipment safety.
 New Zealand Qualifications Authority 2016
11728 version 3
Page 3 of 4
2.2
Suitable tools and equipment are selected and used to enable the engine short
block assembly to be machined in accordance with company requirements.
2.3
Broken studs or bolts are removed without damage to the engine short block
assembly, and threads are restored to enable new studs or bolts to be torqued
to engine manufacturer specifications.
2.4
Liners and sleeves are removed and replaced in accordance with company
requirements.
Range
wet liners, dry sleeves.
2.5
Sleeve recesses are machined to restore seal surface and protrusion height to
comply with engine manufacturer specifications.
2.6
Corrosion repairs are completed so that the engine short block assembly is
restored to normal operating condition in accordance with company
requirements.
Range
2.7
Crack repairs are completed so that the engine short block assembly is restored
to normal operating condition in accordance with company requirements.
Range
2.8
welding, grinding, machining.
welding, stitching, plugging.
Block face surfaces are machined to comply with the engine manufacturer
specifications.
Range
ground, milled.
2.9
Cylinder bore ridges are removed and cylinders are deglazed in accordance
with company requirements and machining tolerances.
2.10
Cylinders are rebored and finish honed in accordance with company
requirements and machining tolerances.
Range
2.11
integral bores, cylinder sleeves.
Bearings are fitted in accordance with company requirements.
Range
main, big end;
may include camshaft.
2.12
Block frost plugs and gallery plugs are replaced and sealed to prevent the
escape of coolant and oil under engine operating conditions.
2.13
Oil pump is machined or replaced in accordance with company requirements.
Range
gear type, rotor type.
 New Zealand Qualifications Authority 2016
11728 version 3
Page 4 of 4
2.14
Cam followers (if fitted) are inspected, and machined or replaced in accordance
with company requirements.
Range
2.15
solid type, hydraulic type.
Cylinder block internal and external threads are restored to engine manufacturer
specifications or recoil manufacturer instructions.
Range
tapping, using dies and die nuts, thread inserting.
2.16
All coolant and oil passages are cleared to enable normal circulation to occur.
2.17
Flywheel surface is machined in accordance with company requirements.
Range
flat flywheel, stepped flywheel.
2.18
All components are assembled and fitted in accordance with company
requirements.
2.19
Adjustments are carried out to ensure component clearances comply with
engine manufacturer specifications.
2.20
The machined engine short block assembly is lubricated, protected against
damage and foreign matter, and labelled to ensure identification in accordance
with company requirements.
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