QC/T 1074-2017 (QCT 1074-2017)

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QC/T 1074-2017
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.060.10
T 12
The technical specification for remanufacturing of
automotive components - Cylinder head
ISSUED ON: APRIL 12, 2017
IMPLEMENTED ON: OCTOBER 01, 2017
Issued by: Ministry of Industry and Information Technology of PRC
Attachment:
Number, name and date of implementation of 22 automotive industry
standards
No. Standard number Standard name Number of standard replaced
Date of
implementation
301 QC/T 727-2017 Instrument for automobile and motorcycle QC/T 727-2007 2017-10-01
302 QC/T 803-2017 Oxygen sensor for automobile QC/T 803.1-2008 2017-10-01
303 QC/T 1072-2017 Gear position sensor for automobiles 2017-10-01
304 QC/T 1073.1-2017 Accelerometers for automobiles - Part 1: Linear accelerometers 2017-10-01
305 QC/T 1074-2017 Technical specifications for automotive parts remanufacturing products 2017-10-01
306 QC/T 1075-2017
Technical conditions for metal
honeycomb carrier of exhaust catalytic
converter
2017-10-01
307 QC/T 777-2017
Technical conditions for
electromagnetic fan clutch of
automobile
QC/T 777-2007 2017-10-01
308 QC/T 1076-2017
Performance requirements and test
methods for continuously variable
transmission (CVT)
2017-10-01
309 QC/T 1077-2017
Terminology and definitions for
classification of automatic control
transmission for automobile
2017-10-01
310 QC/T 1078-2017 Advertising vehicle 2017-10-01
311 QC/T 1079-2017 Suction & delivery vehicle 2017-10-01
312 QC/T 1080-2017 Mobile loudspeaker for popularization of science 2017-10-01
313 QC/T 1081-2017 Electric power steering device for automobile 2017-10-01
314 QC/T 1082-2017 Motor for electric power steering device of automobile 2017-10-01
315 QC/T 1083-2017 Controller for electric power steering device of automobile 2017-10-01
316 QC/T 1084-2017 Sensor for electric power steering device of automobile 2017-10-01
317 QC/T 1085-2017 X-ray testing for light-alloy wheel of motorcycle 2017-10-01
318 QC/T 1086-2017 Technical conditions for range extenders for electric vehicles 2017-10-01
319 QC/T 1087-2017 Technical conditions for pure-electric city sanitation vehicle 2017-10-01
320 QC/T 1088-2017
Technical conditions for charge &
discharge type motor controllers of
electric vehicles
2017-10-01
321 QC/T 1091-2017 Technical conditions for air purification device of passenger car 2017-10-01
322 QC/T 740-2017 Seat assembly for passenger car QC/T 740-2005 2017-10-01
Table of Contents
Foreword ... 7 
1 Scope ... 8 
2 Normative references ... 8 
3 Terms and definitions ... 8 
4 Requirements for dismantling, cleaning, classification ... 8 
5 Inspection and repair ... 9 
6 Exit-factory inspection requirements ... 10 
7 Marking and packaging requirements ... 11 
The technical specification for remanufacturing of
automotive components - Cylinder head
1 Scope
This standard specifies the terms and definitions, dismantling, cleaning, classification,
inspection and repair, exit-factory inspection requirements, and other requirements for
the remanufacturing of automobile engine cylinder heads.
This standard is applicable to the remanufacturing of automobile engine cylinder heads.
The remanufacturing of other motor vehicle cylinder heads may refer to this standard.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB/T 26989 Automobile recovery - Terminology
GB/T 28675 Remanufacturing of automotive components - Disassembly
GB/T 28676 Remanufacturing of automotive components - Classification
GB/T 28677 Remanufacturing of automotive components - Cleaning
GB/T 28678 Remanufacturing of automotive components - Pre-delivery inspection
3 Terms and definitions
The terms and definitions, which are defined in GB/T 26989, apply to this standard.
4 Requirements for dismantling, cleaning, classification
4.1 Disassembly
4.1.1 The dismantling of the cylinder head shall comply with the provisions of GB/T
28675.
head. The surface of the combustion chamber can be processed and repaired, by
grinding within the specified range, to meet the specified dimensional tolerance
requirements; OR match the thickened original cylinder head product drawings or the
cylinder head liner, which is specified by the enterprise, to restore its fit clearance. OR
pre-treat the surface of the combustion chamber; repair it by adding materials such as
spraying or electroplating; then perform grinding, to restore to the original cylinder
head product drawings or the dimensional tolerance requirements, which are specified
by the company.
5.5 Check all holes in the cylinder head. Carry out pretreatment on the damaged light
hole. Repair it by cold welding and other methods, so as to meet the tolerance size
requirements, which are specified by the original cylinder head product drawings or the
company. For the damaged threaded hole, if the company’s requirements allow it, it
may use the enlarged threaded hole and the method of re-inserting the wire sleeve, to
restore to the original cylinder head product drawings or the dimensional tolerance
requirements, which are stipulated by the enterprise.
5.6 Check all parts of the cylinder head for carbon deposits, oil stains, etc. It can be
cleaned with cleaning fluids, such as carbon deposit removal and oil removal; OR use
high-pressure (cold or hot) water jets, to wash the cylinder head surface, bottom hole,
oil passage, water passage and other parts, to remove dirt. For diesel engines, it can use
pyrolysis method. For dirt that is hard to clean, it may use such repair methods, as
surface shot blasting, local sandpaper grinding, etc., meanwhile prevent the secondary
damage to the non-shot blasting surface.
6 Exit-factory inspection requirements
6.1 Each remanufactured cylinder head shall be subject to corresponding flaw detection
and pressure testing, as well as inspection of key dimensions, in accordance with the
technical requirements of the corresponding remanufactured product or original product
drawings.
6.1.1 The surface-repaired remanufactured cylinder head shall be inspected, by
fluorescent flaw detection, magnetic particle flaw detection and other flaw detection
methods, to ensure that there are no cracks on the surface.
6.1.2 Each cylinder head shall be inspected for tightness, according to the technical
requirements of the remanufactured product drawings.
6.1.3 The key dimensions (inner diameter of valve guide hole, depth of valve seat ring,
etc.) shall be inspected; corresponding records shall be made.
6.2 Cleanliness testing is required after the cylinder head is machined, to meet relevant
requirements.